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Topic: RGB LED CUBE  (Read 1 time) previous topic - next topic

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Jun 17, 2016, 10:04 pm Last Edit: Jun 18, 2016, 12:28 pm by 1234567891012151617
I wanted a nice 8 * 8 * 8 RGB LED cube. I have looked at ebay and they cost around £100!  So I decided to make my own.

I know that the human eye can only see things that are relatively slow, I saw a helpful video about it, and decided that I would control them layer by layer with a delay less than 1 (microseconds).This gives us 64 LEDs to control (8*8 ) and we need 192 inputs (64*3) because they are RGB LEDs.

So, my problem is that I cannot control that amount of leds with an arduino, so how can I?

Thank you



sorry if I got anything wrong, I am still new to arduino


also I was wondering where I could get around about 500 RGB LEDs for cheap and what size I should get them. 5mm is pretty cheap, but is it too small? also  should I get them diffused or clear ,whats the difference?

Paul__B

10 mm LEDs are huge!

This might be much easier (and vastly brighter) if you used "NeoPixels" aka WS2812 LEDs, presumably in one of the pre-assembled forms.

I think you meant a delay less than 1 millisecond.  The NeoPixels make this pretty much irrelevant as there is no requirement for them to be continuously multiplexed.

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#2
Jun 18, 2016, 12:20 pm Last Edit: Jun 18, 2016, 12:27 pm by 1234567891012151617
thank you, i will need about 500 of them tough, will this be cost effective?

Paul__B

I figure WS2812 devices on eBay at about three or four for a (US) dollar mounted, or ten for a dollar for the "bare" chips so if you put the work in, it could be worthwhile.



Note that you need a serious power supply!

A limitation is that these have less than 180° visibility.  Larger ones with diffusers (look for WS2811 also) have somewhat more visibility.  I suppose a really big cube would not be all that bad if cheap enough.


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