32 LEDs with less than 20mA

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  1. - 11th January 2014, 22:00 #1
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    Default Re: 32 LEDs with less than 20mA

    Great bi-directional multiplex design here:
    http://www.picbasic.co.uk/forum/showthread.php?t=14439
    Only 5 pins to drive 16 LEDs.

    Woot!

    Robert The Happy Camper
    Last edited by Demon; - 12th January 2014 at 00:21.
  2. - 23rd January 2014, 04:28 #2
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    Default Re: 32 LEDs with less than 20mA

    CURRENT SAVING UPDATE

    Transistors are out, back with current limitting resistors and ultra bright LEDs.

    Old "frosted?" green 5mm LED with 330R: 40 LUX using 9mA

    New clear ultrabright green 5mm 10000 MCD LED with 1K at 90Hz: 40 LUX using 0.053mA
    Tested using AR813 Lux Meter.

    Robert
    Last edited by Demon; - 23rd January 2014 at 04:32.
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