Olin wrote: > There are no LEDs "rated at 5V". Perhaps you mean one with a built in > resistor. Well, for simplification in this circuit, you can assume that there are LED's rated at 5V, since you can go to Digikey and get a single component called an LED with a rating of 5V. Just call me Mr. Technicality. :-) > Even so, I would wire up the LED between the + supply and the PIC > pin because the low side drivers are stronger than the high side drivers. Why do you say the low-side drivers are stronger than the high-side drivers? The 16F87x datasheets say that the max current sourced by an I/O pin = 25ma, and is the same as that sunk by any pin. Is there more that matters here in an LED circuit? Cheers, -Neil. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body