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Topic: Multiplex??????? (Read 922 times) previous topic - next topic


I begin with my brand new Arduino 2009, and I have a question:

If I want to drive 120 leds ( only 5 simultaneously); is there any easier way than multiplexing?

I'm afraid multiplexing is too complicate for my level!

Thank you for your advice!


Apr 26, 2010, 01:28 pm Last Edit: Apr 26, 2010, 01:30 pm by GrooveFlotilla Reason: 1
In theory, I suppose you could do 120 LEDs with charlieplexing and 12 I/O pins.

Otherwise, you could do it with fifteen 8 bit shift registers.
Per Arduino ad Astra


Many thanks for your answer, I will investigate, hoping Charlie Plexing
is a cooperative fellow! :)


.... or you could use a MAX6594, that will drive up to 128 LEDs. Yes it is a charilplexed design but it is all done in the hardware so there is no programming overhead.


Cool, I will try this MAX 6594, it seems more accessible for me!
thanks to you all again

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