Quote Originally Posted by Acetronics View Post
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or use very high efficiency leds ... as there's a lot here ... current can be reduced to ~ 5 mA per Led to get a nice visible glow.

Alain
I put 16 high efficiency LEDs on a MCP23016 just to see what it looks like. They were just a bit too bright full on, so they come out just about right when pulsed in sequence, and current is kept at a minimum.

I could even use a bit lower than the regular 330ohms too.

Robert