>     One thing that is bothering me is how to make the power supply of a
> remote control. An ideal supply would draw zero miliamps from the battery
> when the PIC is sleeping. I could do the supply simply using a battery and
a
> 78L05, but the regulator would draw some energy from the battery even
> without the microcontroller.

You can get "L" version PICs that run on a supply from 2V to 5.5V.  You
don't need a regulator as long as you can guarantee your battery can't
exceed 5.5V and 2V is essentially dead.  3x AAA cells, for example.


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(978) 742-9014, http://www.embedinc.com

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