I'm thinking of building a 24x24x24 cube (13,000 led's)
but I'm worried that if I control 1 led of the cube at a time the multiplexing won't be fast enough and will flicker
so only 576 leds on each level would be multiplexed ?
I just realise I should have said in my first post I'm dyslexic
I was worried that there would be more overhead on the arduino if I ran with more chips ? (if I'm going to struggle with refresh rate)
QuoteI was worried that there would be more overhead on the arduino if I ran with more chips ? (if I'm going to struggle with refresh rate)The fastest way to get bits out of the arduino is the SPI interface; it can pump data out up to 1/2 the system clock. Many of these LED driver chips are basically shift registers so you daisy chain the output from the first to the input of the second -- for example if you have three 8 port chips you just send 24 bits all at once; you don't need to do anything special between chips.Have you seen the ShiftPWM and ShiftMatrixPWM libraries? They may give you more insight in controlling LED arrays.
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