Multiplexing!

This is 5 x 6 matrix of red-green Leds (they are actually rbg, but i don’t need the blue). So it is the equivalent of 60 Leds. These are running off 16 Arduino pins and way too many hookup wires. The vertical rows share common cathodes and the horizontal share anodes. A 2ms delay is used to switch between the vertical rows. Yellow is created by having red and green on at the same time.

16 pins, 60 leds is pretty good but i would like to free up some more pins- so I am going to be using a shift register as well. Stay tuned for my next post where i will attempt to multiplex with a shift register as well.

This will be my basic prototype for the programming of my Sims Needs Meter.

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