Led Cube

I am trying to make a large cube out of LEDs, but there are more LEDs than GPIOs on the arduino board. Are there any tricks for this situation?

Multiplexing.

Use Google to find the many examples of Arduino-driven LED cubes.

How large of a cube? Shift registers and transistors for sinking/sourcing current are typically used.

What size cube is possible?

robonerd137: What size cube is possible?

Technically, the sky is the limit. Realistically, how much money are you willing to spend? Not just in hardware but also in electricity cost. Look at what QubeLED does: http://qubeled.com/#/q-ball-series/4565821268

https://www.youtube.com/watch?v=f1YNyQqbiF0

I meant to ask: what size cube is possible from only one Arduino? Using only one microcontroller, what size LED cube could I make?

robonerd137: I meant to ask: what size cube is possible from only one Arduino? Using only one microcontroller, what size LED cube could I make?

The number of Arduino pins isn't a limiting factor, you could make a very big one with a single Arduino.

fungus:

robonerd137: I meant to ask: what size cube is possible from only one Arduino? Using only one microcontroller, what size LED cube could I make?

The number of Arduino pins isn't a limiting factor, you could make a very big one with a single Arduino.

But seriously, if you're asking that question then you're not ready to start building 32x32x32 (or whatever). Start with a small one, eg. 4x4x4.

The MAX7219 will control up to 64 LEDs in a matrix:

http://www.gammon.com.au/forum/?id=11516

I'm building a 12x12x12 RGB one which uses only 11 pins.

BUT

I don't recommend it. Such a cube (in RGB) requires over 10000 solder joints, and took me 3 weeks of 15 hour days just to solder. Even after that I am not yet finished. I've had a lot of experience with electronics and it is still a huge challenge. Large cubes are not a simple task

Start with something small. 4x4x4 is a nice starting size. Maybe even 5x5x5 if you want some fun. Once you have made one and understood how it works, then you can think about expanding. :)

[quote author=Tom Carpenter link=topic=175483.msg1302621#msg1302621 date=1372890507] I don't recommend it. Such a cube (in RGB) requires over 10000 solder joints[/quote]

You're being nice on that amount. :)

When I made my 3 x 3 x 3 LED cube

https://www.youtube.com/watch?v=uTaN-UfZFXI

I found these two related links to be very helpful as well including much help and advice on the forum. Good luck Pedro.

http://www.instructables.com/id/LED-Cube-and-Arduino-Lib/?ALLSTEPS https://www.youtube.com/watch?v=ea8aG2aQ5FY

Thank you all for the advice :)