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RGB LED Globe - Rotating Sphere

A Globe is technically much more difficult than a matrix. Nevertheless we built a first version (v1) with 40 RGB LEDs arranged at the outside of a rotating ring with a diameter of about 25 cm. One turn of the globe is divided into 200 sectors interupted by a infrared light barrier. Hence, one frame consists of 40x200 pixels - each with 8 color states.

The LEDs are controlled by one ATmega328 with 15 8bit shift registors (74HC595) sitting on two PCBs in the center of the globe. The power is supplied via slip rings. The two PCBs and the mechanical part are again self-made.

The firmware and the board layout can be found in the download section. Despite we are not really proud about the mechanical design we have to say that it looks pretty awesome! If we show it to friends, they seem to be really impressed and are kind of magnetized. They saw nothing similar before and they are right, there are not much diy rgb globes on the market.

By the time we decided to build at second version (v2) with improved but still hand-made mechanics. Luckily the electronic parts could be reused from the first prototype and hence the board layout didn't change. Eyecandy!

 

Globe - v1

Our first attempt turned out to be only a prototype. It was 100% functional but we definitely needed to improve the mechanics. Here some images of the construction and first tests of the first Globe:

 

Globe - v2

The very first video recorded with a mobile phone of the second version. The mechanics, electronics and software are finished but we still need to come up with some images to display. And of course we need to provide you with more information about this project.

 

Final Video and Making-of

We finally managed to make a final video of our RGB-LED-GLOBE! The Cam we used seems not capable to capture the device in its full beauty. Unfortunately, rotation speed and frame rate of the cam seem to interfere so that you see an overlay in the video which is not present in real. Furthermore, the colors are not reproduced as in real by my cam. However, since we made the video not exclusively to show you the device working, but also to give a short documentation of its creation we can live with a reduced quality.

 

Source Code and Layout

The source code is written pretty simple, the infrared sensor is fed to a digital input which fires up an pin change interrupt on rising edge. The interrupt itself just toggles a flag called "LS" in the code. The main job is done outside the ISR in main code. First we compare how many sectors were displayed within the last frame (turn). If it was to much or to less, the sector time is corrected in the corresponding direction. Next step is to feed the 15 shiftregisters and wait for the sector time to be passed. Then the game starts from the beginning for the next sector ...

The circuit of the globe is that simple that we did not draw any schematics and started direct routing. So the only thing we can publish in this place is the layouts of both of the boards. For code and layout check the download section.

 

Wiring

Wiring is done pretty simple just use the following scheme. However, even if the scheme looks simple the wiring via copper wire is a hell of job and requires a lot of patience and a lot of beer!

Power Supply

Since we get so many questions concerning the power supply of our globe. Here it is. Pretty simple: Just two self made cylinders made of stainless steel. The lower one has an inner diameter fitting to the rotation axis. The upper one has a bigger diameter and in between there is a third cylinder made of teflon. The power transfer is done via simple slip contacts. We had to try several materials until we found a practical solution. Finally we came out using some kind of spring steel. The big cylinder which holds both of the slip contacts is also made of teflon.

 

 

Simulation - GlobeSimulator

Some people asked: "What is the program you used to generate the data and the 3d simulation I saw in the video?" Well, the program in the video was written with LabView some time ago. By the time we rewrote the program in java and added some more features. Now it became its own software project - GlobeSimulator.

 


Comments   

 
0 # daniel 2014-10-31 14:36
hola soy de Mexico me podrías pasar el material para poder construir uno por favor te agradecería.
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0 # Sberbankplc 2014-10-28 05:37
Estimado Señor / Señora,
¿Necesita financiación?
¿Necesita un préstamo para pagar sus cuentas?
¿Necesita negocio o un préstamo personal?
¿Quieres refinanciar para su negocio?

Damos préstamos a empresas individuales y con un interés del 2%
anualmente. Para obtener más información, póngase en contacto por correo electrónico:
macauleyrobertloanlendergmail.com
nombre:
país:
Cantidad:
Teléfono:
Duración del préstamo:

respecto
La señora Jeanette
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0 # Steffen nahr 2014-10-24 21:33
Hallo, ist es möglich den globe als kompletten Bausatz zu kaufen?
Wenn ja, bitte per e-Mail bei mir melden unter:
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0 # CLAUDIR SCHWENDLER 2014-10-22 13:23
OLÁ,, SOU BRASILEIRO E ACHEI SEU PROJETO ESPETACULAR.. CONSEGUE ME ENVIAR A LISTA DE MATERIAIS e tutorial PARA O EMAIL . Parabéns pelo projeto
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+1 # Halvonik 2014-10-22 09:36
Hi , Iam from Slovakia , and Iam studnet , and I want to make rgb globe , can you send me detailed schematic and List of parts pls ?. my email
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0 # Rdy 2014-10-19 12:51
Oh Super,
Would be very happy if you give me information about this project something Materia list :-)
Under Email:
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0 # Sergey 2014-10-19 09:48
Would be very pleased if send me more information about this project
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0 # reib 2014-10-10 03:11
please! upload the schematics, :sad: just the part in which you connect the LEDs with the shift registers
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0 # eduardo 2014-10-07 16:29
hi
I wonder how it is that the LEDs are connected to the circuits
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0 # Bart 2014-09-30 15:14
Hi,

Is there a prefered viewing angle of the rgb LEDs? And is it better to use a clear or diffused type of LED?

Thanks!
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0 # steven 2014-09-23 14:56
hello this project did not work quite well but we
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0 # Said 2014-09-20 13:24
plz can u send me step by step tutrial
am nobie
i want to learn some

my email
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0 # Travis Duck 2014-09-12 04:53
Hey Epic project cant wait to get some time to build one myself.

At the risk of setting a record here for most times asked on one thread could I get a parts list and any other info you would give out ?

I am willing to design a PCB layout for you to upload for others in Eagle view for you to put up on your website if you don't have to time to do so.

Thanks in advance
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0 # Alen 2014-08-27 12:30
Hi, I was looking something for my school project, and your globe project is amazing, so if you could send me somekind of instructions or list of components I would gladly appreciate it!
My email is:
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0 # Ketan 2014-08-05 13:50
can you send me a list of all the components used and the wiring of it? eagerly waiting to make it.
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0 # Oscar Fuentealba 2014-07-15 18:51
Hi!
I need your help!

can you send me a list with all components that were used?

please!

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0 # Oscar Fuentealba 2014-07-15 18:59
Quoting Oscar Fuentealba:
Hi!
I need your help!

can you send me a list with all components that were used?

please!



o.fuentealba @ hotmail.com
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0 # David 2014-06-26 20:44
can you tell me what type of motor you use (stepper, servo or simple DC motor) and which pin of PCb should I connect it to ? please respond me ASAP !!! I really need your help !! my Email
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0 # bunga 2014-06-25 09:32
you're the best 8)
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0 # Martin C. 2014-06-21 07:04
Can you sale the led globe ready to use?
my email is
Thanks
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0 # Lorena 2014-06-16 15:51
Hi guys!!
Excellent!!
I would like acquire your product but I'm Ecuadorian, could you buy it me?, How much would cost ....Thanks a lot.
I hope your response.
Mi mail is
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0 # Dayu Setya Putra 2014-06-13 00:42
That was incredible project sir, I am attracted for practice this project for my end school task. Could I have this schematic and others component for build this project? my e-mail is:

Thanks a lot! :lol:
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0 # masoud_goli 2014-06-05 22:31
Hi men in the first:
you are amazing
i am an Persian & i love your people and technology and your brains
i saw this project in 2 years ago but why without schematic ? :o
how can i have that ?
sorry for my English
if you want to reply me , this is my email:
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0 # Tiko 2014-06-01 17:33
Hi !! great project !! please say me the size of PCB
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+1 # Finn E 2014-05-09 19:46
Hey, great project and all...

I was thinking of making this as a project, so could you please send me the schematics and any other info? This would be my first big project 8)
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0 # sameep 2014-04-29 14:35
dude i need ur help.my mechanical frame is vibrating too much.actually i have connected 48 rgb leb and 18 74hc595 on half part of ring.other side of ring is empty.
help me.
my email id:
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0 # Valentino 2014-04-28 21:15
How did u program the atmega separately or directly from the board, and how did u connect the wires to the controller?? pls i rly need it its my graduation work !!!
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+1 # Ayush 2014-05-20 09:44
Use an arduino as ISP to program the atmega and then place it on the board. Google "Arduino as ISP"
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0 # diegoalej123@gmail.c 2014-04-21 17:52
what type of LED used? common anode or common cathode. please answer me, because I'm thinking build it. thanks
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0 # Ayush 2014-04-23 10:46
It's common cathode!
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+2 # Ayush 2014-04-15 18:45
My friends and I made a complete replica of your project. It was done in quite a hurry, in a matter of 2 days. We are not quite certain of the placement of IR LED and Photodiode. Is the photodiode attached to the PCB or with the RGB LEDs? Hope you will reply and we can complete it
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0 # Andrei 2014-04-13 16:23
Hi, I'm a student, I'm interested in your LED GOLDE, please help me how to do that? I have a project about microcontroller.
My email:
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0 # kevin 2014-04-10 23:26
I have some questions
1. ¿How the matrix configure?
2. How do you set the matrix?
3. ¿What programming languages ​​recognized by the program globe simulator?

thank you
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0 # MIPU 2014-04-06 07:59
Thanks for sharing everybody in the world^^
I'm Vietnam
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0 # Valentino 2014-04-01 18:17
Could you pls tell me what are the values of those 120 resistors ?
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0 # #jonathan 2014-03-17 03:00
I want to do this project in order to graduate and you need the diagram I would greatly appreciate if you could send me my mail
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-1 # Pete Kirkham 2014-03-21 17:17
If you're doing it now-a-days, I would add a third slip ring for serial data and use WS2812B or similar RGB leds which build-in serial interface, then reverse the syncing photo-diode. That way you can put the main part of the electronics in the base (and don't need any of the shift registers) rather than having it in the middle. (assuming having a retro DIP pcb in the middle isn't the effect you're after)
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0 # Stephen 2014-04-11 19:55
You have obviously never built an RGB globe or you would know that the WS2812B is far to slow to even come close to the 40 led x 200 scan lines used for the above RGB Globe.

Using 200 scan lines and the slowest speed that still looks decent (600RPM or 10 rotations per second) you would have a massive 500uS between refreshes, taking the 50uS minimum to reset the WS2812B leaves you with 450uS, the WS2812B clocks data at 800kHz, so you would be able to send data to at most 14 WS2812B (math says 15 but you would have timing losses.

So, now-a-days most 595 shift registers are still 100x faster then the WS2812B.
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0 # Alan 2014-05-05 12:02
Using 2801 rather than 2812 pixels would allow for a data clocking rate up to 25Mhz up from the 800k that 2812 does. 2801 is a more forgiving format too and the simplification in wiring would be phenomenal.
The globe concept is awesome and if I had any better understanding of how to get the images to display I'd love to build 1.
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-1 # Cgncvk 2014-03-15 22:27
Hello, I would be glad if they could send me all the information about the RGB LED Globe that would be really great.

My email would be the
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0 # efsn 2014-03-09 22:56
an incredible project I would like to send me the list of materials such as capacitors, resistors, transistors that are not distinguished in the imagethanksMy email:
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0 # Elisa 2014-02-21 11:00
HI!
Your progejt is amazing. Can I ask how you conect ATmega328 to Led's? I am quit begineer on this. hope you have time to repply. :)
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0 # #Joe 2014-02-17 13:38
Hi, name's Joe.
I'm close to my final diploma semester of engineering and I would like to do this as my Final Year Project.
Hope you'll do me a favor by sending me the part lists and schematics of this project to my email:

Millions of thanks and keep up the good work for your future projects! =D
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0 # Nghia Phan Trong 2014-02-13 15:02
My email :
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0 # Nghia Phan Trong 2014-02-13 15:00
Hi, I'm a student, I'm interested in your LED GOLDE, please help me how to do that? I have a project about microcontroller .
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0 # Алексей 2014-02-11 07:45
Чё для Русских зажали схему.Я помоему к вам обратился с прозьбой.
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0 # Алексей 2014-02-09 20:20
Здраствуйте!!! Можно попрасить Вас выслоть схему и список деталей.Зарание Благодарю!!!
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0 # Matthias 2014-02-09 14:20
Hello, I would be glad if they could send me all the information about the RGB LED Globe that would be really great.

My email would be the
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0 # Martin 2014-02-07 18:06
Would be very pleased if send me more information about this prodject.
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0 # Massimo 2014-01-26 14:55
Can you send me the part list please?
8) 8)
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0 # Massimo 2014-01-26 15:19
Quoting Massimo:
Can you send me the part list please?
8) 8)

is my mail
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0 # Blazej 2014-01-25 14:01
Can you send me list of items on e-mail () or write here? How to connect LEDs to 74HC595?
1QA-1BLUE
1QB-2BLUE
1QC-3BLUE
1QD-4BLUE
...
15QH-40RED

or

1QA-1BLUE
1QB-1GREEN
1QC-1RED
1QD-2BLUE
...
15QH-40RED?

How to connect the anode to the Atmega?

Thanks
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0 # RGB globe shematics 2014-01-23 17:28
If u could send me the shematics that would be great,
i rly would like to know what motor did u use and what RPM does it need to get to have a clear image ?
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0 # Blazej 2014-01-23 16:03
Nice project
Can u send me the schematics and list of items on e-mail?

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0 # venkatesh 2014-01-23 14:28
nice project buddies.i would also like to try this,can u send me the schematics.

Thanks
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0 # Kura 2013-12-14 16:22
also like to know how to connect the LEDs to each 74HC595 I'd appreciate quite :-)
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-1 # Antun 2013-12-10 18:03
Please can you send me the schematic?

Thanks!
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0 # Adam 2013-12-04 14:28
Hey, i'm an electrical engineering apprentice, this looks like a great project to challenge myself with as i am always looking to learn :) Please can you send me the schematic?
Thanks!
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0 # alanmizael 2013-11-30 05:20
hey man, excellent work, could you send me the squematic at please
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0 # Paul Cook 2013-11-25 11:52
please could you send me the squematic at
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0 # JULIAN RUIZ 2013-11-20 23:29
can you send me the esquematic diagram at
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0 # JULIAN RUIZ 2013-11-20 23:24
PLEASSE YOU CAN SEND ME THE SQUEMATIC DIAGRAM AT please
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0 # V4Visca 2013-11-20 22:33
spectacular project! good work! could you send me a list of the components( capacitors, resistors, transistors...) and the rpm of the engine?
Can i program the ATmega328 by USB? i'm a neophyte in this area. here is my email
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0 # carlos 2013-11-12 19:56
por favor me podrían dar los esquemas planos y lista de materiales lo necesito un proyecto urgente para poder graduarme por favor mandemenlo al correo
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0 # ttomanek 2013-11-07 10:22
prosimsoupis soucastek
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0 # Truc Nguyen 2013-11-05 16:18
can you do this with WS2811 Strip? can you helping with a code? i'm using Arduino Uno board.
thanks
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+1 # Frensis 2013-10-31 12:38
hi,this is an incredible project,
I would like to send me the list of materials such as capacitors, resistors, transistors that are not distinguished in the image
thanks
my e-mal:
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0 # hungtrinh36 2013-10-29 04:44
hi
you can share project
please send email:
thanks
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+2 # Daniel 2013-10-25 16:29
Nice gadget! I'm also interested in more information (schematic, etc). Please send me more to
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+1 # Alex 2013-10-18 14:27
Hi!, I need more build information Please
My Email:
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+1 # BALTA 2013-10-18 06:01
an incredible project I would like to send me the list of materials such as capacitors, resistors, transistors that are not distinguished in the image
thanks
My email:
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0 # joni 2013-10-08 11:56
hey its a amzing project and i want to build him can you send me the drawing on orcad or another program you used ??
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0 # martijn 2013-10-10 17:15
Hey i must make this project for my graduation in electronics would you please send me also those schematics thanks allot

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0 # Nahuel 2013-10-07 01:29
alguien sabe q tipo de motor utiliza este POV??
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0 # Damian 2013-10-05 17:27
HOLA.. Me encanto el proyecto, me podrias pasar el circuito con los materiales...Mu chas Gracias
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0 # Daniel 2013-10-01 09:15
Hallo Globus-Team,
Ich finde euer Projekt echt super und würde mich gerne daran versuchen. Bin Mechatronikstud ent und deshalb nicht der totale Elektrikfachman n. Hoffe hier aber einiges zu lernen. Ist es möglich eine Teileliste von euch zu bekommen?
Hoffe von euch zu hören... Viele Grüße Daniel
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+1 # Mariano 2013-09-23 17:07
hola amigos! alguno tiene la lista de los materiales que se usan en la plaqueta? porque no estan especificado en las imagenes que se pueden descargar! saludos
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0 # hernan 2013-09-20 16:41
ola quiciera desarrollar ese proyecto para mi universidad soy estudiante de ing de sistemas y me gustaria que me regalaras la lista de materiales y el procedimiento del circuito te agradesco by colombia
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0 # Jaden 2013-09-11 10:48
please, can ANYONE please send me part lists and schematics ! i am inlove with this project and really want to build it for my yr 12 major. please help me out!
thanks heaps. it will be muchly appreciated
please, please, please
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-1 # MrMurphy 2013-09-13 06:00
Hi Jungs,
wirklich richtig saubere Sache die Ihr da auf die Beine gestellt habt Respekt dafür. Besteht die Möglichkeit das Ihr die LabView Datei zur Verfügung stellt? Besitze zwar eine Lizens bin aber noch recht unerfahren im Umgang mit dem Prog :sigh:
vielen Dank schonmal

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-2 # WILLYFV 2013-08-31 17:49
jaden

http://www.elektroda.pl/rtvforum/topic2543286.html
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-2 # Jaden 2013-09-02 07:29
thanks!
do you know of any other useful information i might need to build this project ?
anything at all .

Thanks heaps
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+1 # WILLYFV 2013-08-30 04:07
muy interesante proyecto realizo por lo que he leido en lenguaje C, tengo varias dudas:
1) capacidad de imagenes que se pueden mostrar una, dos, tres, cuatro, n*****

2) si es posible explicacion de como determinar el tiempo para el encendido y agado de los led

3) no quiero hacer el mismo proyecto de esta manera si no de forma circular como para una biclicleta

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0 # Jaden 2013-08-26 08:46
could it be possible to get a parts list ?
& any circuit diagrams,
Thank
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0 # Woina 2013-08-28 12:12
for me too please! I also need a part list an a Wiring plan. i wan tto draw it in Eagle layout. Can anybody tell me what with the pins on board 1 0..7 and 8..13 and ADc 0..5 is meaning? Please help me to understand how the RGB LED´s are wiring.
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-1 # Woina 2013-08-28 12:13
Quoting Woina:
for me too please! I also need a part list an a Wiring plan. i wan tto draw it in Eagle layout. Can anybody tell me what with the pins on board 1 0..7 and 8..13 and ADc 0..5 is meaning? Please help me to understand how the RGB LED´s are wiring.

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0 # Edwin vega 2013-08-24 19:18
Amigos deseo saber como hacen girar el Globe LED..??
Y como instalaron el infra Rojo??
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0 # luis omar 2013-08-23 16:06
Hey great job very good and very helpful I have a question no more. In ATmega328 board have other components capacitors, resistors and other things that I fail to distinguish can you tell me what material is it? Please my email is
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0 # luis omar 2013-08-23 14:42
Oye excelente trabajo muy bueno y muy útil no mas tengo una pregunta. En la tarjeta del ATmega328 tienes otros componentes capacitores, resistencias y otras cosas que no alcanzo a distinguir ¿me podrías decir que material es? Por favor
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-1 # Zohaib 2013-08-16 01:45
Hey can i please get a parts list and If I have to use the Arduino and the atmega382 ?please email me at
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+1 # Sciferlogical 2013-07-08 16:23
For those looking for other sources on how to do this project the following link may help. A friend tracked this down. It is in Russian...I used Google translator to help me.

http://easyelectronics.ru/3d-led-globus.html
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+3 # Leandro 2013-04-25 18:52
Hi, I have just one question. The photodiode must be connected to pin 3 of Atmega328? I await your response. Thank you.
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+2 # Massimo 2013-04-25 17:29
And sorry.. can i've the part list too?
maxiz at hotmail.it
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0 # Massimo 2013-04-25 17:28
Hi.
I've understand clearly ho to build it..
And that it will take a lot of time to connect all leds.
Which i don't understand is..
How can i program the images that it must show then?
i know that i've to use globe simulator to create the code, but then where I should put this code? Togheter with firmware? How? And the firmware can be burned with a normal ATMega programmer right?
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0 # Nicolas 2013-04-24 16:10
hi I write because I wanted to do this project as year-end project and I need 2 circuits boards and wanted to know how is the usb conection through that connects to usb and nesisito know well the pin connections atmega328 I am a student of technique in electronics and I would love to do many gacias await your response. this is my email:
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0 # Stephen 2013-06-04 19:17
What usb, they did not use a USB connection on there board.
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0 # Ivan 2013-04-07 19:24
Hi there I'm having a couple of problems with the main pcb board the one with the atmega chip on it it wont go through the program I have an atmega328P-PU is that the chip you have as well?

and it will not recognize the ir input ....is the input on the digital pin 3 or analog pin 3?
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0 # Ivan 2013-04-17 19:31
fixed it
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0 # IronEagle 2013-04-03 06:59
Hallo Leute
Ich schreib`s mal lieber auf Deutsch, da mein Englisch nicht gerade das beste ist!

Ich bin auch ein Elektronik begeisterter Bastler. Hab aber leider nicht so die Erfahrung mit yC und da ist so eine Anleitung echt hilfreich!
Ich will mir auch so einen bauen und ein paar Fragen sind noch offen, aber da komm ich schon irgendwann selber drauf. :P

Ich finde euer Projekt echt top und will mal danke sagen, dass ihr das alles online stellt und euch Zeit nehmt die Fragen der Leute zu beantworten!!
Das ist nicht selbstverständl ich, da hab ich in diversen Foren schon anderes erlebt!

Grüsse Joe
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0 # Oscar 2013-03-16 18:44
Hi, the condenser that you show in the scheme of led's connection.. How much uF it is? And where i connect them?. Also the photodiode where it is the connection on the board? Thanks you
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0 # Stephen 2013-03-16 23:17
Quote:
# René 2012-08-27 06:06
The CAPs are 100µF, 100nF and 22pF, respectively.
The Photo-diode connects to an interrupt pin on the Arduino.

And im not sure what a "condenser" is, hoping you meant capacitor.
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0 # Stephen 2013-03-16 11:32
Hey guys, figured I would drop an updated video.

http://www.youtube.com/watch?v=L9BaXpfreVg

Still debating on weather to place a parts list and schematics online. This is not the kind of thing you can just slap together without lots of time spent planning it out.

It took almost a year of planning for me and another student to plan and build it.
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0 # Jaden 2013-09-11 10:46
please, can you please send me part lists and schematics ! i am inlove with this project and really want to build it for my yr 12 major. please help me out!
thanks heaps. it will be muchly appreciated
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0 # petulko89 2013-03-08 17:25
Hi, I know it's probably presumptuous but I want to ask you if you could send me electronic schematic and list of component parts for . Thank you for your answer
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0 # Ivan 2013-03-15 15:56
reverse engineer it from the pcb boards
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0 # co0l3r 2013-03-03 18:16
Plz Send me a partlis :)
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+4 # Stephen 2013-02-21 00:09
Hey guys its been a while, just got my globe running today have a look.

http://youtu.be/O8B22OjIKR0
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+1 # Ivan 2013-02-15 04:07
Hi there Im just wondering what values did you use for you capacitors,resi stors and what is your power source going into the board

I plan to drive my pcb's with a 9v battery and a 7805 regulator.

and can we get a detailed schematic instead of just pcb layouts since I plan to make my own pcb's ( i'm adding some more things :) )
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0 # Spiro 2013-02-12 17:07
hi sorry for my ask but cant you upload the schematic of you'r globe. Great job :)
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+3 # Manuvstihl 2013-01-26 23:59
Rene:

Suppose I used an Arduino Uno Microprocessor instead of the ATMega 328, could I still use the Glediator Software for the Globe? :-)
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0 # Stephen 2013-04-29 21:25
The Gladiator Software is not made for the globe project.
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+1 # Driessss 2013-01-03 14:43
Hey I also want to makethis very nice project .
Can you please send me a partlist. 8)

Thanks
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0 # JasminK 2012-12-16 21:08
Hello guys. I liked the project very much so I started with making it. Can you please send me list of parts needed for that, because I need to deliver it to assistant in faculty so I can get money for the parts.

Thank you in advance :D
My e-mail is
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-13 # Wayne Masters 2012-12-16 09:25
If this is 3D, what dimmension do you call a 'fortune teller's crystal ball'?
There is actual depth to my 3D LED works in progress and they don't use computer codes.
I really feel this computer code stuff is just a phase that the wealthy have forced on the poor.
THe idea that flatscreens are used to view charts and graphs to analyze economics is scary.
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0 # Harry 2013-04-30 19:03
Quoting Wayne Masters:
If this is 3D, what dimmension do you call a 'fortune teller's crystal ball'?
There is actual depth to my 3D LED works in progress and they don't use computer codes.
I really feel this computer code stuff is just a phase that the wealthy have forced on the poor.
THe idea that flatscreens are used to view charts and graphs to analyze economics is scary.



Lot's of people like these projects very much like i do, so don't judge other people's work without giving proof of doing it better yourself.
They don't have to share it with us but they do, and i say keep up the good work thank you.
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0 # Wayne Masters 2014-03-23 00:09
A minus 13, feeling lucky i don't know any of you.
I work on the 4D political Anayzer now to enslave the rest of the minus13 crowd.
Putin is my partner.
LOl
grow up guys, shave, get a haircut and you can join me.
Sort of overbuilt for just music.
I write the songs that make the whole world stink!
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0 # Wayne Masters 2014-03-23 00:14
Wayne, you have few typos but other wise you are perfect.
4D Political Analysis is my bag
FPGA in my brain typing this.
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0 # Amin 2012-11-23 00:47
Hi there.i,m trying to build globe and the first trouble i face is that i cant find atmega328 in my area/country . i tried to program atmega8 wth hex file instead , by deleting other effects and shortening the code in Arduino program.nothing happends.how can i setup arduino to upload codes to atmega8 with my usbasp programmer.
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-4 # amin salimi 2012-12-25 19:56
:zzz :zzz :zzz
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-1 # Karl 2012-11-12 14:35
Ich gebe an den Pin 5V (natürlich OffSet 0-5V), mit einem DutyCycle von 20% und einer Frequenz von 10Hz / Rechteck (so hab ich mir das mal zusammengereimt ...) Könnt ihr mir bitte sagen, was da für ein Signal drauf muss? Ich werde einfach nicht schlau... :cry:
Ein Bild vom KO wäre natürlich das Edelste :-D
Danke euch schon jetzt hunderttausend mal...
Hoffentlich gehe ich euch nicht zu fest auf die Nerven... :sigh:

(entschuldigt die zwei Post, war immer zu lang)
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0 # Karl 2012-11-12 14:35
Guten Tag ihr zwei!

Ich bin nun schon ein ganzes Stück weiter mit dem Teil...erste Gehversuche sind angesagt!
Nun habe ich allerdings noch ein riesiges Problem.
SPI funktioniert ganz und gar nicht wie es sollte...
Verkabelt und angeschlossen ist soweit alles richtig. Nun hab ich aber das Problem, das wenn ich einschalte immer die selben 7 LEDs rot leuchten und sonst gar nichts passiert. Ich vermute stark, dass es mit dem Signal der Lichtschranke liegt. Ich Debugge zur Zeit noch auf dem Tisch ohne Drehung, was heissen soll, dass ich einen Geni fürs LS brauche...
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0 # WWC 2012-11-08 02:57
Hi
Your code is calling for the avr/prgspace.h library. Is there a download for that?

Thanks
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+1 # René 2012-11-08 21:33
prgspace.h is part of the arduino IDE. But I guess with a bit of search you should find it in the www.

Cheers!
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+1 # Stephen 2012-10-27 01:51
Hey, just going over some of the code and noticed "case 1: for (int l=0; l
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-1 # Stephen 2012-10-27 02:00
Hmm not sure where the rest of my post went :o

Anyway was looking at the code and wondering why you used SendRecSPI, since your only sending, doesn't that slow down the Arduino?

Still working on my frame, working on a motor mount atm and working code in my head. Trying to figure out if its possible to use nRF24's transceivers on the globe and a Touchscreen Arduino handheld to change images and maybe freehand some designs.

They really dropped the ball at my school when it came to teaching C :cry:
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0 # René 2012-10-29 07:24
Sorry dude,

didn't really got you question. However, all the best for your project! If you have further questions just let us know!

Cheers!
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0 # Jürgen 2012-10-12 08:51
Hallo ihr zwei!

Ich beschäftige mich gerade mit dem nachbau eures Projekts. Auf der Firmware bin ich auf den define vom Latchpin (nehme an, dass das der Eingang für die Fotodiode ist?!) gestossen. der ist als nummer 10 definiert...das wiederum ist am uC aber der Eingang für den externen Quarz...

Ich blick nicht durch, könnt ihr mir bitte Helfen?

Danke euch!

Grüsse Jürgen
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0 # Thomas 2012-10-20 19:10
Hallo Juergen,

der latchPin in der Firmware ist definiert als Pin 10 vom ATmega328 in der Arduino IDE (vgl. http://arduino.cc/en/Hacking/PinMapping168). Dieser ist mit PIN 12 des Schieberegister s verbunden, dem sog. LatchPin (vgl. z.B. http://www.arduino.cc/en/Tutorial/ShiftOut).

Hilft das erstmal weiter?

Gruesse, Thomas
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0 # wildcat robotics 2012-10-12 02:30
Hello me and a few friends are buildong your rbg globe for a schiol project and we would like to know what kind of system you used to keep the motor cool you can contact us at
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0 # Karl 2012-10-08 17:57
Hallo miteinander!

vor kurzen bin ich auf euer Projekt gestossen und bin zurzeit mit den Vorbereitungen für einen Nachbau beschäftigt.

Mir ist nur ein kleines Problem aufgefallen:

Wenn ich mit einem durchschnittlic hen Strom von 20mA pro LED (also pro Farbe) rechne, gibt das einen Strom von 160mA pro Schieberegister . Dies übersteigt allerdings den möglichen Strom um mehr als das Doppelte pro Register....
Wie habt ihr das gemacht? ich sehe auf eurer Schaltung keine zusätzlichen Treiber oder sonst was?

könntet ihr mit bitte ein wenige auf die Sprünge helfen?

Danke schon mal

mfg Karl

PS.: Das Ding ist der Hammer, ich freu mich drauf bis meiner Läuft... :lol:
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0 # René 2012-10-08 18:10
Hallo Karl,

wir haben die Vorwiderstände einfach etwas höher gewählt! Den genauen Wert habe ich jetzt nicht im Kopf und da ich gerade auf Urlaub bin kann ich auch nicht nachmessen. Ich denke so um die 10-15 mA hatten wir eingestellt.

Aber die 595er sind sehr robust auch weit über das Datenblatt hinaus! :lol:

LG und Prost!

René
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0 # Karl 2012-10-09 10:35
Hallo René

Danke für Deine Antwort! Werde das auch machen (330Ohm / 220Ohm ^^)

Bereits tun sich aber noch andere Fragen auf: Ich hab mir mal euer Java Programm zur Simulation und Bilderzeugung angeschaut und verstehe das Ganze leider noch nicht ganz...

Auch hab ich im Video gesehen, dass der Prototyp auf LabView respektive CVI basiert (stimmt doch, oder?). Könntes Du mir nicht dieses CVI zur verfügung stellen? oder den Quellcode des .jar schicken (ich weiss, gigantische Forderung...)

Wäre wirklich toll, ich möchts wirklich verstehen und nicht einfach nachbauen auf gut Glück...

Danke Dir vielmals, hoffentlich versau ich Dir Deinen Urlaub nicht!

Lg und Prost zurück!

Karl
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+3 # René 2012-10-11 15:37
Hallo Karl,

ja wir hatten nach der Fertigstellung des Globe schnell gemerkt, das es doch recht umständlich ist die Bilder im Quellcode zu "zeichnen" und uns daher einen kleinen Helper in LabView geschrieben.

Als wir dann alles fertig hatten habe wir das Ganze der Portierbarkeit wegen auf Java umgesetzt.

Wenn Du magst kannst Du gerne das ursprünglicher VI haben, es macht im Grunde das Gleiche wie die aktuelle JAVA-Version, evtl. fehlen ein zwei features, aber Bilder bekommst damit allemal auf den Globe und zum lernen ist es m.M.n. sogar einfacher über LV.

Schreib einfach ne kurze mail an und dann bekommst Du das VI.

LG,

René
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0 # Karl 2012-10-15 07:14
Danke für das VI...

Klappt fast alles tiptop, mir fehlt nur noch ein subVI:

rescale_size.vi

das funktioniert nicht bei mir...könntest Du mir das nochmals zukommen lassen?


Danke Dir!

LG Karl
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+1 # Comp Engr 2012-09-30 11:06
Sir's should I change the Output pins status in the firmware? if the common of the LED's are Positive? should I change it to HIGH?? I already inverted the bytes but still all the LED's are Turned on all colors of the LED. Help please :(
digitalWrite(PI N_SCK, LOW);
digitalWrite(PI N_MOSI, LOW);
digitalWrite(de bug_pin, LOW);
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+2 # René 2012-10-04 07:43
I'm sorry to say this,

but regarding to your changes in the code I have to admit that this project may go beyond your (current) skills!

Sorry for that but we have no time to teach people!

Cheers!
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-1 # Comp Engr 2012-10-04 16:38
Very Last question, Should I tap Ground instead of VCC on the digital pin 3 of the atmega? because if I tap vcc(with resistor 1k) on it the LED's wont turn on, but if I tap ground ( with resistor 1k ) the LED's were on and blinking but blinks so fast.
Thanks again I think I'm getting the program and the logic of this project.

Sorry again sir's.
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0 # Stephen 2012-10-24 02:13
If your using the Globe Code Rene used then you should have a photocell on pin 3?
Its purpose is for timing, if your connecting to either ground or Vcc its just seeing it in that state all the time and if its looking for a high and you give it a high it will just use that, even if its a constant high. I am also trying to learn the code they used, I have nearly completed my globe frame, there code is simple yet complex for me. My last project was over 1500 lines, where theirs is just under 200, yet I have to stare at it for hours to understand whats going on lol.

I think your best bet would be to go to the Arduino.cc forums and post pics and ask questions, you will get a larger number of people willing to help you.

P.S. To Rene
We went back to using 595's for our initial build, we are going with a 64 led setup, once we have that running we will try out a separate ring with WS2801 if we have time. I have the frame build just doing adjustments.
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0 # René 2012-10-29 07:22
We wish you all the best. Keep informing us!

Cheers!
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0 # Jesse 2012-09-29 05:59
Hello friend, I want to build your globe project, but I would like you to send me the list of materials. also like to know how to connect the LEDs to each 74HC595 I'd appreciate quite : )
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-4 # Comp Engr 2012-09-28 16:51
All the LED's are still all turned on (all colors) when I try to supply the PCB, I already inverted the bytes, all the led must be turned off must supplied by 1 because the common of the LED's is positive and all the Led's that must be on is must be sent by 0 by the atmega328..

Thank you for entertaining my questions and asap replies.. :D
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-3 # Comp Engr 2012-09-28 17:17
Another question sir's is the pin 10 of the 595 are really shorted on VCC? because I read on a data that the pin10/MR must be active low?

Thank you again..
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0 # René 2012-10-04 07:38
Active LOW in this case means that for LOW the registers are cleared! Since we don't want this happen Pin 10 is pushed to Vcc.

Cheers!
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0 # Philipp D. 2012-09-28 08:53
Hallo,
Welche LED´s (Abstrahlwinkel , Leuchtintensitä t, Artikelbezeichn ung)hast du für dein Projekt verwendet?

Welchen Motor hast du verwendet?

mfg
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+2 # René 2012-10-04 07:41
LEDs sind von hier:

http://www.led-dealer.de/5R40RGB2DW66M-LED-5mm-4-Pin-RGB-5000mcd-gemeinsamer-Minuspol-diffus

Der Motor ist ein ganz billiger für 15 EUR beim blauen "C".

LG
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0 # Comp Engr 2012-09-27 06:59
What should I do, when I turn the project on or when I'm trying to run it all the LED's were turned on ( all of the colors ) we already used 74HC595. What do you refer me to do sir. Help please.
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+2 # René 2012-09-27 08:02
Invert all bytes shifted out in the firmware!

Cheers!
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0 # Comp Engr 2012-09-23 16:33
I'll ask something, what should I do if my LED's common changed to a anode after we construct the prototype with the LED's but on our first test on the LED's the common is cathode. ( Different Power supply. )
Does the +5V and GND has connection after the 595's was put in the PCB?
We used 74LS595 instead of 74HC595 what will be the effect on the project?
We tested the project but it doesn't project the programmed in the ATMega328. Help please ASAP.
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+2 # René 2012-09-26 19:53
For this project it does not matter wether you use common anode or common cathode, since the 595s are capable for sourcing or sinking current.

However, you have to adjust the source code when using common anode. Just invert all the bytes shifted out to the registers.

Cheers!
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0 # raul 2012-09-17 07:16
nice project.. :-)
can u please let me know the motor details and the source code in .asm format..
i've to work on this project so it would be a lot of help from u guys...:-)
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0 # Ron 2012-09-10 12:39
Hi,

Well done! Amazing project. I do not really understand, how you upload program to Atmel328 ? How you connect it to PC? Can you please shortly describe procedure?

Thank you in advance.
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+2 # René 2012-09-10 19:47
All upload is done via UART. There a simple pin-header for this purpose on the globe's PCB.

To this guy we just connect a simple USB-UART-Conver ter (for example an empty UNO board) and that's it.

Cheers!
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0 # Ron 2012-09-14 11:16
Thanks,

One question more, do you have some kind shift between LED1 and LED2? Are they in same level or LED2 is between LED1 and LED3?
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0 # Thomas 2012-09-16 20:53
Hi Ron,

yes, we shifted every 2nd LED. Hard to see on the image/sketch. The purpose was to reduce flickering while staying at the same 'resolution' (40 x 200) and rotation speed. It works quite well. However, it's difficult to get them (front and back side LEDs on the ring) in sync.
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0 # Stephen 2012-09-09 11:05
Figured I would give an update on my project.

Going to use the ws2801 LED strings on my current build, just going to cut the strings at each section and attach to the ring. Also my current ring is made out of a 5 Gallon Bucket cut into 1 1/2 inch strips. Its fairly rigid once you add a solid bar to it. Its 11.2 inches wide also and will be using about 50-55 LED's, the only real drawback to the ws2801 is to clock the register you have to wait 500us, so max refreshes per second is about 2000. After calculating in rotations per second we decided to shoot for about 100 vertical lines instead of the 200 you guys went with.

I have also relaid out the old 595 layout so that it can be fabricated on a normal perforated board.
http://s274.photobucket.com/albums/jj271/Donziboy2/RGB%20GLOBE/
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0 # René 2012-09-10 19:52
Hi Stephen,

nice wok for the Boards, this will help for sure everyone who has no ability to etch PCBs!

But there's one point I did not get: It the globe made of WS2801 working or not? As you mentioned already there should be some serious issues with timing since latching of these guy takes too long!

So want is the current status?

Cheers!
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0 # Stephen 2012-09-11 10:37
I'm currently waiting for the ws2801 strips to come in for testing. From what I got from the data sheet I should be able to get 1500 refreshes per second pretty easy. So I will run them 100 vertical lines and 15 rotations per second (900 RPM).

As soon as they come in I'm going to see just how close to 2000 refreshes per second I can push 2 meters of the strands which is 64 LEDs/ICs. May even go for 3m since I ordered extra's :)

I was going to play with my new RC motor last night but I got the wrong pinion gear for it so I have to go back to the shop and get the right one.
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0 # Bostjan 2013-01-15 14:50
Stephen hi!

Just asking, have you managed to do it with WS2801 strip, and how does it looks.. ;-)
Best, Bostjan
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0 # Stephen 2013-03-16 23:12
Just an FYI WS2801's are just to slow for this project.
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0 # Biplav 2012-08-15 18:27
Guys, awesome project superbly carried out!!!
can you please email me the necessary files, proteus files, codes and everything at !!i really want to build this myself!!!thanks in advance!!!I am looking forward to hearing from you!!(please,do reply)
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0 # René 2012-08-27 06:07
Hey Biplv,

everything you need can be found within the text above, the sketches within the text, the comments below and last not least in our download section.

Cheers!
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0 # Comp Engr 2012-08-15 16:46
Sir Thomas, can you tell me what are the values of the capacitors, Oscillator, and resistors that you used.
And how did you programmed the ATMega328? is your ATMega is a stand alone that don't need andruino?
and last how did you change the image projecting by the globe while its running/rotating?
It will really help me if you reply. thanks for all the knowledge that you guys shared. thumbs up :D
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0 # René 2012-08-27 06:06
The CAPs are 100µF, 100nF and 22pF, respectively. The oscillator has 16MHz.

The Atmega was programmed outside the circuit wihtin an Arduino board.

We store 4-5 images in the flash of µC and they are randomly displayed when the globe rotates. So there is no online update or communication while rotating.

Cheers!
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0 # Walter 2012-08-09 23:38
Yo,necesito saber si me pueden dar el esquema del circuito?¿
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0 # Thomas 2012-08-14 07:16
Sorry, but no. See text above:

"The circuit of the globe is that simple that we did not draw any schematics and started direct routing. ..."
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0 # tadas 2012-08-09 09:23
congratulation for fantastic the project!! i'm from lithuania and can't speak english very vell. maybe this project creaters can send me EAGLE or PROTEUS project files? i vant to know how connect LED to 595. how conect Rgb GLOBE TO PC. what need atmel programer or something like that.. how need make synchronization ? what nedd dc motero and what need motor turns per s. i want to kow everything becouse i want make this amzing project. please send me all details about this in big thanks!! :sigh:
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0 # eduardo 2012-08-09 02:58
hola! oye me podrían ayudar a armar este proyecto por que me serviría de mucho en mi carrera por favor mi correo es gracias.... realmente son buenos
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0 # Ashvin 2012-08-01 22:16
HI GUY's.... congratulation for the project...i was thinking of making one of the rgb globe..they really look good for eye candy display ... defiantly i would like to make a bigger one, that can use upto 100rgb leds. that would be fantastic ..if someone can help me with the full schematic and how to connect all the hardware fully.....pleas e can someone upload a full schematic ......thanx in regard ...ashh!! :lol: ;-)
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0 # René 2012-08-27 05:59
Sorry Dude,

but I don't think that anybody will deliver full schematics for you and such a project. The only way is to go through hell and learn some basics by yourself!

But I can tell you one thing: It's worth going that way when regarding the final product!

Cheers!
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-2 # MANIVANNAN M 2012-07-29 13:51
plzzzzz tel me the detailzzz wer can i get these LED'S and the circuit board.e.t.c.... plzzzzzzz mail me the details....
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0 # René 2012-08-27 05:57
I guess all the information needed to rebuild this project is given in then text and sketches above. Please see also our download section.

Cheers.
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0 # Comp-Engr 2012-07-11 02:37
The wiring I just got it right at the moment I posted this hahaha sorry.

Quoting Comp-Engr:
Good day sir's! great project.
I just want to know,
> what are the function of the photo-diode and the IR in that project?
> How can you display a new image while the sphere is rotating or running?

Can you send me the details and how the wiring is done?

This project was accepted for our thesis project.

thank you in advance.
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0 # Comp-Engr 2012-07-11 02:33
Good day sir's! great project.
I just want to know,
> what are the function of the photo-diode and the IR in that project?
> How can you display a new image while the sphere is rotating or running?

Can you send me the details and how the wiring is done?

This project was accepted for our thesis project.

thank you in advance.
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0 # René 2012-08-27 05:55
Hi there,

the photo diode in conjunction with the IR LED is just to synchronize frames. For principle of POV please use simple google search. It's beyond the scope of this page to give detailed information about the basic processes of POV and electronics.

If you will have found the information you will see that everything necessary to rebuild our project is written in the text above and all files can be found in the download section.

Cheers!
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0 # Oscar Fuentealba 2012-07-07 01:46
Quoting Oscar Fuentealba:
Hi. I'm doing the same proyect and I bought the "arduino" plate separate. Can you help me to know how I can do the conection from the plate with the 74hc595 to the arduino
Thanks. I enclosed my email

my email
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0 # Oscar Fuentealba 2012-07-07 00:24
Hi. I'm doing the same proyect and I bought the "arduino" plate separate. Can you help me to know how I can do the conection from the plate with the 74hc595 to the arduino
Thanks. I enclosed my email
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0 # René 2012-07-08 06:22
Hi Oscar,

there are several examples how to connect an Arduino to 595s in the web. A simple google search will give tons of results!

The order of the 595s and the colors of the LEDs can be found in the sketch above!

Cheers!
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0 # Oscar 2012-07-04 02:00
hi.
Where do you connect the common of the LEDs?, to 5V? or to GND?

Thanks
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0 # René 2012-07-08 06:23
To GND! :-)

Cheers!
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0 # Oscar Fuentealba 2012-07-08 23:15
ok, thanks!

but... in the moment that i connect to gnd, the light doesn't turn on :(
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0 # Alex 2012-06-10 15:48
Very cool ;-) I might try and make one of these sometime 8)
Is there any specific reason why you used Teflon to hold the power connectors? Is it to do with the low resistance or was it just something that was close to hand?
Many thanks, Alex
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0 # René 2012-06-12 07:51
It's just because it's insulating! :lol:

Cheers!
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0 # Richard 2012-06-08 12:30
Hi again,

Last question(s) - I promise!

Are the LEDs CA or CC (most RGB LEDs I've seen are CA)?

The sensor - is it a photocell (resistor) or a photo-diode (diode or transistor). Do you have a part number?

I have something in return - I've made a schematic diagram (in EAGLE), which I'd like to send to you. Where can I upload it to?

Regards
Richard
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0 # René 2012-06-12 07:50
The LEDs are of common cathode type. However, since the 595s can source or sink it actually does not matter.

We used a photocell-resit or, but a diode will be fine as well. We just had this guy as spare part.

You can send us files to

Cheers!
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0 # Richard 2012-06-08 04:13
Hi again Guys,

One more question: How are the LEDs connected - like this?

1QA=1R,
1QB=1G,
1QC=1B,
1QD=2R,
1QE=2G,
1QF=2B,
1QG=3R,
1QH=3G,
2QA=3B,
2QB=4R,
:
15QH=40B

Regards
Richard
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+2 # René 2012-06-08 05:59
You can read the wiring from the section "Wiring" above!

Cheers.
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0 # Richard 2012-06-08 07:02
Thanks René,

Now I see the LED configuration - I didn't look close enough at the diagram above!!

The synchronization issue makes sense with two rows. Something to think about...

Thanks for the reply.
Best Regards
Richard
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0 # Richard 2012-06-08 01:03
Hello René and Thomas,

Fantastic work on the globe. I'm tempted to make my own...

I have a question regarding the positioning of the LEDs. Your first version had all 40 LEDs on one half of the ring, while the second version has 20 on each half. Why did you change the configuration and which is easier to control (or does it not make a difference, just timing)?

Best Regards
Richard
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0 # René 2012-06-08 05:58
The second version (LEDs on both sides) allows you to get flicker free pictures at lower rotation speeds. Additionally Masses are more equally distributed within this solution.

However, the first version (LEDs on one side) needs just a bit more rotation speed but the effort you have to spend into the firmware is much less! The reason is the EXACT synchronization between both LED rows needed to be guaranteed in the second solution!

If we would have to rebuild the globe we would go back to the one-side-soluti on just for easier synchronization / programming.

Hope that helps.

Cheers.
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-1 # jose 2012-05-28 21:05
hiii :lol:

I want to know how to keep fed the plate.
the last thing missing to complete our project
sorry for my bad English
thanks a lot: B
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+1 # Thomas 2012-06-04 19:38
Hi Jose,

sorry, I don't understand your question. Can you please rephrase it.

Thomas
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+1 # Alearmijo 2012-05-27 03:10
Excelente la edición del video y por supuesto el proyecto con LED, un abrazo desde Chile.
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+1 # ALElectronicX 2012-05-22 15:03
Hi, I just can't understand how did you power the globe !!! In the pictures of the project I only see a motor below and some bolts but no wires going to the 2 PCBs !HOW ? : :lol:
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+2 # René 2012-05-25 17:50
A pictures says more than 1000 words so we just updated the side above, now things should become clear. If not, feel free to ask! 8)
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0 # Daniel 2012-05-22 04:34
Hi :lol: I'm currently trying to do this RGB Globe(Excellent work by the way!) and I'd like to know the size is the ring where the LED's are mounted. And also what material it's made of? And what kind of motor is making the globe rotate?

Thank you! :D
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0 # Oscar 2012-05-21 16:40
What are the characteristics of the engine?
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0 # Victor Hugo 2012-05-15 19:39
Great job! I will try to build one. You could publish a list of the necessary components to the circuit and a photo of the wiring of the LEDs?

I also plan to make it a little bigger, with the wheel of a bicycle. It would be very difficult to add more LED?

Sorry for my bad English

Greetings from Spain. ;-)
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0 # ALElectronicX 2012-05-07 17:05
I was thinking...If I power the 74HC595 from 3.3V ( that way the outputs will be at 3.3v rather than 5V)would It be necessary to use resistors as the 5050 leds work at that voltage ? Just asking :D
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0 # René 2012-05-07 19:34
I would not recommend doing so! 3.3V is just a little above the forward voltage of blue and green color (3.2V typically). So you would need really small current limiting resistors. Further I heard from several people that they run into trouble when daisy chaining 595s that were powered with just 3.3V!

Cheers!
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+1 # Stephen 2012-05-06 13:20
Im planning out my Capstone a few months in advance and this looks like a good project to tackle.

http://i274.photobucket.com/albums/jj271/Donziboy2/GlobeScheme.png

http://i274.photobucket.com/albums/jj271/Donziboy2/GlobeBoard.png

Ive already started drawing part B of the circuit, I'm limited to small pcb's since I'm using a lite edition of EAGLE.

Ive got a few Q's. Some already on youtube.

What kind of copper wire did you use for the LED's

Is it possible to increase the number of LED's?

How many Shift Registers can the Atmega328 handle?

Whats your spacing on the LED's and the size of the ring?

Is it possible to add say a RAMTRON FRAM to this and load large animations or will the 328 get mad and release magic smoke? :-)

What Frequency crystal are you using on your 328?

Sorry for all the Q's.
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0 # Stephen 2012-05-06 14:05
Just noticed in my effort to make the PCB more compact I ran the 595's:

15 14 13 12 11
|
6 7 8 9 10

This will cross the led wire runs X :cry:
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0 # René 2012-05-07 19:44
The copper wire is that thin that nobody will mention! :lol:
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0 # René 2012-05-07 19:43
I am not sure anymore which diameter we choose for the copper wire, but since it has to drive just 20mA you just can take the smallest one you'll find!

For sure you can increase the number of LEDs. Be aware that you will need to change the firmware of the 328!

The maximum number of 595? I don't know! In principle it's unlimited, but in real you should take care on the "strength" of your clock signal as well as the latch signal!

The spacing of our LEDs is about 4° and at the top and the bottom we left 10° free.

You can hook up any Ram or SD card to the 328. You just have to care that data processing from RAM to 595s is done fast enough :-)

We used standard 16MHz oscillator.

Cheers!
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0 # Stephen 2012-05-08 12:12
NICE!!! Thanks ;-)

I have some 24AWG Essex coated magnet wire laying around I might use that.

Using some extrapolation I'm guessing you used an 8" ring for your design.

Killed some time and laid it out using InkScape.
http://i274.photobucket.com/albums/jj271/Donziboy2/GlobeLEDlayout.png

The yellowish board in the middle is my board size. Probably going to go with a 6" ring to reduce the spaces between LED's when its running.
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0 # René 2012-05-08 20:01
Best wishes for your project and keep on sending us pics of progress! ;-)

Cheers!
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0 # Stephen 2012-05-11 01:01
What kinda RPM's are you guys working with on your globe?

Trying to figure out motor, and refresh rates and what not.

Probably gonna be 2 months before I start my build. And I want to make sure I have as much info before I run into the gremlins :)
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0 # René 2012-05-11 13:33
It's round about 10-20 Turns per second (depending on the motor voltage).

Cheers!
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0 # Stephen 2012-05-14 21:17
What kind of motor are you guys using?
Fan motor or something stronger?
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0 # René 2012-05-15 05:58
A fan motor would be somewhat weak I guess. We used that kind of motor they use in RC cars. These guys are really strong, cheap and have a wide range of input voltage and rpm.

Cheers!
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0 # Stephen 2012-05-23 01:47
Thanks for all the info so far Rene.
Its starting to take shape, at least in my head and the guy i'm working with.

Was just looking at the LED ring what is that anyway? It looks like its one piece of uncut aluminum? And i'm guessing from pics it about 8 inches?
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0 # René 2012-05-25 17:32
You are right, it is indeed ONE single piece of aluminum. It was made from ONE whole block, not kidding!

The outer diameter is 225mm and the thickness is 3mm, so the inner diameter becomes 219mm.

Have a nice weekend!
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0 # ALElectronicX 2012-05-06 12:18
I've been searching for a week how to build a sliding contact to transfer power but I haven't found nothing ! In the images you posted I only see a small motor ...sorry for being so silly but I really starting to hate my project loool :D
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0 # René 2012-05-07 19:46
We will put some magnified pics from our slip ring construction to this page a.s.a.p. !! I promise ;-)
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0 # Ductape 2012-05-18 20:18
https://engineering.purdue.edu/ece477/Webs/F09-Grp07/index.html

This project did something similar and has a close up picture of the slip rings it used. They brushes DC motor carbon brushes from the hardware store, the holders were just soldered copper and the rings were made from brass pipe.

https://engineering.purdue.edu/ece477/Webs/F09-Grp07/nb/Shaun/Motor%20Pics/Slip%20Ring%20009.jpg
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0 # ALElectronicX 2012-05-05 17:32
Another thing...I've read that 74HC595 shiftregister have a max current output of 70 mA..so each pin of you led has nearly 10 mA ...Would it be enough for the 5050 rgb leds or shuld I connect 4 leds common cathode and 4 leds common anode (this way I would have nearly 20 mA for each output ) ? I saw another similar povglobe project that uses a lot of resistors, one for each output and I'm wondering if it would work without them. Thanks a lot and sorry for my bad english :lol:
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0 # René 2012-05-05 18:14
10 mA is fine, you should not worry about that point! You will not see much difference in intensity between 10mA and 20mA but your needs for PSU will change dramatically! :lol:

And two Amps over the slip rings will work for sure! Just take care that the slip rings are always in contact during rotation and put some big capacitors to your board, thats it!

Cheers!
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0 # ALElectronicX 2012-05-05 16:13
Hi,I am trying to a POVglebe for a school project.I already have leds(64 5050 rgb) and I use a PIC18F4620.But I have some doubts regarding the supply for the rotating PCB and leds...How does sliding contatc work and how can I power the entire circuit? I have done some calculus and I'll need more than 4 amps( 60ma x led x 64 led = nearly 4 amps for a full white globe!!!) What supply did you use and how did you transfer the 5v ? Please help :sad: my email is :
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0 # Luke 2012-05-04 14:14
Could you post a picture of it fully wired and not moving? I'm slightly confused on how the photo diode and infrared led are connected.
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0 # René 2012-05-05 18:15
Yes for sure we will do so within the next days!

Cheers!
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0 # Zohaib 2013-08-16 01:48
Quoting René:
Yes for sure we will do so within the next days!

Cheers!

hey , have you uploaded the picture of how to wire it? and the photo diode and infrared led?
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-2 # Domas 2012-04-29 01:00
hello, i need this item. how much cost it? I need that it will be done completly and what i must to do is just to conect to electricity. If you interest for this spot contact with me Thenk you.
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0 # Thomas 2012-04-29 19:57
Sorry, we don't sell it:
http://www.solderlab.de/index.php/faq
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0 # Mike 2012-04-28 10:35
Congratulation for such a great work,
I have three questions I think other maybe have too

1-How to connect RGB led to the shifters?
2-How connect the ISR?
3-What is the freqence rotation for a still image?

Thank you in advance for your reply
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0 # René 2012-04-29 08:03
Hi Mike,

you are right, these questions are interesting for others too! We will do a drawing and put it to this place soon!

To your 3rd question: The image is ALWAYS still, independent on rotation speed. That's what the ISR is good for!
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+5 # Mike 2012-04-29 20:56
Hi René

Thank you very much for your reactivity, congratulations for this project again.
Sorry but now I have another question ,I think it's important before making the mechanical part

even and odd LED are on the same line or they are shifted
like this ?
1------------------
-------------------2
3------------------
or like this?
1------------------2
3------------------4
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+1 # René 2012-04-29 21:42
They are shifted!
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-1 # Mike 2012-04-30 08:32
Thank a lot for your reply
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0 # Thomas 2012-04-30 06:54
Shifted like your first version. We wanted to reduce the flickering at low rotation speeds. This is something we also need to document.

Thomas
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+2 # Daumants 2012-04-25 08:14
Hello, very beautiful project.
I hav 2 questions.
1)What kind of electromotor rotate globe, where can buy it on internet?
2)how much money taked all project?
could you answer me, please!
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-3 # harry 2012-04-23 02:47
i want to learn that, i am always exciting with something like this....can you teach me? please....
my email:
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-4 # Lucrecia 2012-04-21 14:40
Hola , te escribo desde Argentina y realmente me encanto lo que hicieron con el Globo RGB , me descargue los tutoriales por que lo quiero hacer como proyecto final este año pero no se si con 3D , primero quiero empezar a hacerlo con assembler si tenes alguna idea me encantaria que me ayudes - Desde ya Muchas Gracias
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-8 # Wyllton 2012-04-21 13:12
I need urgent code in c language, led a globe showing the world map, you can help me?
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