Try keeping the cap on the motor (or two caps to the motor frame) and
add two "hash chokes" (Digi-Key #M5252-ND or simillar) in the motor
leads near the motor.  A hash choke is basically a low Q, high current,
moderate inductance coil intended to stop EMI.

Sherpa Doug

> -----Original Message-----
> From: Quentin [mailto:qsc@ICON.CO.ZA]
> Sent: Wednesday, August 29, 2001 2:25 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: PIC reseting due to relays
>
>
> Gary Neal wrote:
>
> > 7.      Moved the caps to the terminals right on the motor - better
> > success.  Failed probably 1% of the time.
> >
> >          I'm saying failure is when the PIC resets or jumps
> to a random
> > place in the code.
> >          So, I'm thinking if I put a bigger cap on the motor winding
> > terminals, it will help even more.  Question is, how big of
> a cap should I
> > use?  I can't use an electrolytic b/c the motor reverses
> direction.  Anyone
> > have a suggestion?  Hopefully something fairly cheap.
> We in the electric R/C world always put caps on the terminals (10n).
> What we also do is to connect a cap from each terminal to the
> metal body
> of the motor as well.
>
> Quentin
>
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