On Thu, Apr 22, 2004 at 05:14:50PM +0100, Michael Rigby-Jones wrote:
> Even easier is to drive one side of the LED and a CMOS inverter input with
> the PIC pin, and the other side of the LED with the inverter output.  The
> above solution may be ok, but you are limiting your forward voltage to
> 2.5volts for a 5v supply rail which may be marginal for some LED's
>
>               |\
> ---+    +-----+ |0-------------+
>    |    |     |/               |
>    |    |                      |
>    |----+----+-|>|-+---/\/\/---+
>    |         |     |
>    |         +-|<|-+
> PIC|          LED
>    |
> ---+
>
>
> Regards
>
> Mike

The only problem I see is packaging. You can get opamps two in a 8 pin package
no problem. Not sure about inverters.

BAJ

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