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Topic: LED cube multiplexing (Read 164 times) previous topic - next topic

kppancholi

I am making an 8x8x8 LED cube.
Which contains total 72 pins. 8 for layer select and 64 for selecting LED.
I have Arduino UNO. Can I do it with UNO?
If yes then which mux I should use?

PaulRB

#1
Aug 01, 2015, 10:26 am Last Edit: Aug 01, 2015, 10:39 am by PaulRB
Hi and welcome.

Use 8 x tpic6c595 (daisy-chained and connected to the Uno's SPI pins) for the cathode columns and 8 x p-channel logic-level mosfet connected to either 8 Uno outputs, or, easier, a ninth tpic chip for the anode layers.

http://www.digikey.com/product-detail/en/NDP6020P/NDP6020P-ND/1055922



Cue Bob!

You will need 64 current limiting resistors for the cathode columns, 8 x 10K pullup resistors for the mosfet gates, 9 x 0.1uF bypass caps for each chip and some big caps for smoothing the power, eg. 1000uF.

Paul

WonderTiger

Welcome to the forum,

A couple weeks ago I'd released a library for controlling a LED cube driven by 8 bit shift registers, this also includes the 8x8x8 version. This topic includes schematics for a 5x5x5 LED cube, if you're interested you could take a look at it :) TOPIC HERE

Greetings,

Mike
Universal LED cube library available at: https://forum.arduino.cc/index.php?topic=336469.0 :)

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