I think Olin is thinking motor from a servo, whereas I thought you meant=20
complete servo.  If the latter, you should not need a flyback diode, as t=
he=20
servo has it's own interface to covert the digital PWM signal to a=20
motor-drive signal.

Cheers,
-Neil.



On Sunday 15 June 2003 10:19, Joel Middleton scribbled:
> Yes I do not have a flyback diode. I am not sure how
> to implement this with a servo, are they any examples
> on the web that I can look at?
>
> --- Olin Lathrop <olin_piclist@EMBEDINC.COM> wrote:
> > > Well I found out that I am not
> > > getting a nice square wave. The rising edge looks
> >
> > fine
> >
> > > but the falling edge is a slope.
> >
> > This depends on the external circuit.  Something
> > must be sourcing lots of
> > current (almost certainly above spec) when the PIC
> > tries to lower the pin,
> > or the low side driver is blown.  Did you forget a
> > flyback diode?
> >
> > If the timing is otherwise right, then it's not a
> > software problem.
> >
> > <undocumented absolute mode code ignored and
> > snipped>
>
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