Be sure you do not have the cap so big that the rise time for the power
supply is slower than that required to give a solid reset pulse at startup
of the processor.


At 11:00 AM 6/10/99 -0400, you wrote:
>You would probably be wise to make the PIC sort-of isolated from teh power
>supply.  For instance it needs to draw XX mA.  Insert a resistor in the 5V
>supply to the PIC to permit, say 5 * XX mA, to pass with the voltage
>staying with 5%-10%.  Now add a nice big cap by the PIC to keep the voltage
>where it should be.
>
>You also want a nice big cap where the servo power leads attach to the PICs
>PCB.  Try 220uF, 10V.
>
>You end up current-limiting the PIC (big deal) but this prevents spikes off
>the servo motors from screwing things up.
>
>I have one customer who LC isolates the PICs from the servos, and he's
>never had any problems either.
>
>Andy
>
>==================================================================
>   Andy Kunz - www.montanadesign.com - andy@montanadesign.com
>           Life is what we do to prepare for Eternity
>==================================================================
>
>
Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr