: > I inadvertently connected an LED directly to RC5 with no current limiting > resistor. It is flashing brightly at 1 Pulse Per Second. The > PIC port can only > source about 25 mA and that's about right for a bright LED. No, the PIC output is speced to source a max of 25mA, that doesn't mean it is limited to 25mA, you are likely drawing more then 25mA which is out of spec for the PIC and will damage something. > Other than the > current draw is there any down side to driving the LED directly? Yes, for the above reason, the PIC outputs are NOT current limited by design, and certainly don't limit themselgves to only 25mA. TTYL -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads