What do you mean by adequate bypassing on the motor and PIC?  I have diodes
across the coils of the relays.

Vern

> ----------
> From:         Thomas C. Sefranek
> Reply To:     pic microcontroller discussion list
> Sent:         Monday, February 14, 2000 8:51 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: PIC not turning off BJT
>
> "Bradshaw, William V" wrote:
>
> > I have a BJT that is switching the ground of a set of relays for a
> motor.
> > When  I send a 5V pulse from the controller to the bjt it turns it on
> but
> > then my circuit goes crazy.  The circuit works when I remove the motor.
> > Does anyone have any suggestions.
> >
> > Thanks in advance,
> > Vern
>
> I have to ask the usual questions...
>
> Do you have diodes across the coils fo the relays?
> Do you have adequate bypassing on the motor and PIC?
>
> --
>   *
>   |  __O    Thomas C. Sefranek  tcs@cmcorp.com
>   |_-\<,_   Amateur Radio Operator: WA1RHP
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>
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>