> I'm having trouble with a circuit.  5V regulator, PIC, and a reed relay.
>
> When I run it from a 9v source, it draws ~20 mA-40mA.  It can run
> "forever" without problems.
>
> When I run it from my car electric system (12v battery, alternator ~
> 14v) it gets very hot.  The regulator gets hot, but nothing terrible.  The
> PIC gets noticably warm.  Pressing your finger on it for > 5 seconds
> causes you to feel pain.

Do you have the "recommended" capacitors on the input and output of the
regulator?  Something is probably oscillating.

michael brown

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads