LEDs and Multiplexing
building LED wall using 60 8*8 LED matrices
Topic: building LED wall using 60 8*8 LED matrices
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Re: building LED wall using 60 8*8 LED matrices
Aug 06, 2014, 07:11 pm
Buffer SCk, SS, MOSI out to each string. Use 6 chip selects if there is enough IO pins. Otherwise, let MAX7219s be the data in to data out buffer, and just have the SS & SCK buffered.
3 to 8 decoders are generally 1 of 8 outputs low, that doesn't help on data; would help on chip select.
Good drive current to get across lots of PCB traces and wiring, vs wimpier HC parts:
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