piclist 2002\09\06\133110a >
Thread: BI-COLOR LED
www.piclist.com/techref/displays.htm?key=led
picon face BY : Harold M Hallikainen email (remove spam text)



       The two zener approach is clever, but a little more expensive. It's also
true that the power dissipation in the voltage divider is higher than
that in the PIC due to leakage current when the input is trisated.
Another trick (but, again, a bit more expensive) is to use a "rail
splitter" virtual ground (like
focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TLE24
26). This is pretty much a voltage divider followed by an op-amp voltage
follower. But, again, cost is higher.
       So, there are some neat tricks out there!

Harold

On Fri, 6 Sep 2002 16:34:49 +0100 Morgan Olsson <spam_OUTmorgans.rt@spam@spamTELIA.COM>
writes:
{Quote hidden}

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