Hacked Gadgets Forum

December 12, 2008

Rotating Blue LED Display

at 11:12 am. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks

 

Thanks to Csaba for sending in this very nice looking display. The frosted blue LEDs have a great effect!

Project code (zip).

"Motor
An old tape recorder motor. With this load it can rotate about 7.4/s. The image is flashing, it should rotate about 25/s. For supply a 7809 IC is used.

Supply of the rotor
The commutator of another similar motor is used (crw_1511) and a 3 phase rectifier with a big capacitor (crw_1510). For supply a 7806 IC is used shifted with a diode, so the supply voltage for the uper part is 6.7V. The rectifier voltage (1.2V) is subtracted from it.

LED
8 pieces of 5mm 3000mcd blue leds. The body is made to be diffuse by sandpaper, so the viewing angle is much larger. The bottom is painted black, so there are no additional light spots.

Control
PIC 16F84 microcontroller @20MHz.

Edit
The displayed picture can be edited in Excel pixel by pixel. The Excel table is divided to character spaces (5×8 + 1 column spacing) but any graphics can be displayed. 100 columns are displayed, but 250 can be edited. If the jumper is on, than the first 100 column will be visible and not moving. If the jumper is off than the 250 columns will slowly be shifted through the displayed area.

The output of the Excel sheet should be copied into "data.inc" and the software must be rebuilt and downloaded.

Schematic
The LEDs are driven through a 100 ohm resistor directly and the supply can be turned on/off by a FET. An optical sensor is used to get position info. (Dismounted from an old floppy drive.)"

 


 

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29 Responses to “Rotating Blue LED Display”

  1. Rotating Blue LED Display | New Port Me Says:

    […] (more…) […]

  2. joe Says:

    hi how can view the circuits on this project/

  3. ginge Says:

    Nice Finish! Great work.

    joe:
    It is very similar to the classic “Bob Blick Propellor clock”.
    http://www.bobblick.com/techref/projects/propclock/propclock.html
    It even uses the same chip, so the schematics are going to be very very similar. There are hundreds of projects like this one, but this is a good starting point.
    Let’s hope that more information goes up on this one.

    I might see if I can get around to finishing my crazy prop scroller. So far it has 32 tri color SMT Leds in a strip, and derives power like an electric toothbrush does, induction. Oh, and you can load new videos into it over USB.

  4. Alan Parekh Says:

    Hi Ginge,

    The project code has been added (zip file). I think the Bob Blick project was very inspiring, that is what gave me the idea for this project many years ago http://alan-parekh.com/projects/rotating-led-display/

  5. misasd Says:

    ima li neko elektricnu semu za ovaj projekat

  6. misasd Says:

    hi how can view the circuits on this project

  7. Alan Parekh Says:

    Hi misasd,

    If you need more information than what is in the project zip listed in the article you will need to contact the project creator (also linked to in the article).

  8. Spinning LED Display using Fan Motor - Hacked Gadgets - DIY Tech Blog Says:

    […] Csaba Bleuer has completed version 2 of his spinning LED display. Here is what version 1 of the spinning LED display looked like. […]

  9. Spinning LED Display using Fan Motor | Gizmo Addiction Says:

    […] Csaba Bleuer has completed version 2 of his spinning LED display. Here is what version 1 of the spinning LED display looked like. […]

  10. Spinning LED Display using Fan Motor | Geeker Says:

    […] Csaba Bleuer has completed version 2 of his spinning LED display. Here is what version 1 of the spinning LED display looked like. […]

  11. Spinning LED Display using Fan Motor Says:

    […] Csaba Bleuer has completed version 2 of his spinning LED display. Here is what version 1 of the spinning LED display looked like. […]

  12. DonJ Says:

    Hi!
    very nice job!
    there is a way to get the schematic for this circuit?
    and how did you sync the PIC whit the rotation frequency?

  13. sujil manandhar Says:

    Hi I like to make this for first time but i could not found circuits daigram.Please mail me for circuits and software.

  14. grelli Says:

    hi from germany,
    how can I find the schematic on this project and or this on version 2 ?

    ;=)

    grelli

  15. Vano Says:

    I take a great interest in such ideas, me very much interests, synchronisation automatic or hand-held?

  16. Viktor Says:

    Hello Alan. It’s very interesting project for me. Please mail me the circuits if it’s possible.

  17. Viktor Says:

    Hello Alan. It’s very interesting project for me. Please mail me the circuits if it possible. Sorry i write a wrong mail address.

  18. Alan Parekh Says:

    The circuit has been added (last image in the article). Big thanks to Csaba for sending it in.

  19. thomas Says:

    could u pls help me in this
    i’m little bit confused wth the procedure
    can u pls mail me

  20. Nicholas Says:

    Hi, Alan. This is really a great project. Can you send the schematic of circuit together with the code to my email address if possible?? Thanks!!

  21. Stephen Chuah Says:

    hi Alan can i hv the code ? if can mail me thx

  22. Alan Parekh Says:

    Hi Stephen,

    There is a link to the code in the article.

  23. Stephen Chuah Says:

    Oh thx i just see that XD…Really great job

  24. ElectroNick Says:

    A timeless classic!

    The most difficult part of this project is changing the picture by command of a button while the display is already spinning. Sounds like an IR remote or a modulated DC supply through the power rails would be the way to do it.

  25. groupie Says:

    can i see your schematic diagram for my activities cause i cannot understand the diagram under your post.

  26. Albert Says:

    Hello! Great project! Just on question…Were does the FET connect to in your diagram?

  27. anees Says:

    i wish if u can send me the code for this project to my email i love this project and i want try thank you

  28. prafull Says:

    pls can u send me the circuit connection i am very confused

  29. Gaurav Says:

    Can anyone say that, from where I can buy such type of gadget ?

    Or Please send me the whole project code,,,,,,,,,,,
    please please please

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