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.

I'm just shooting in the dark, here, but is it possible that the regulator
can't deal with the "noisy" input, and the resulting output is causing the
pic problems?


-Steve

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