On 4/26/07, Phillip <pryals@gmail.com> wrote:

> So I've got a project where I need to replace a small sensor that outputs a
> 50Hz frequency with a PWM duty cycle of 30-70%.  I have designed the circuit
> in analog components, but it would be cheaper and (I think) much easier to
> do it with a PIC.  My problem is just finding some kind of information on
> where to even begin.  I've found quite a few examples of PWM, obviously, but
> the detail is the frequency.  Is it possible to specify (for lack of better
> words) a specific frequency for the PIC to output?  Can the PIC (speficially
> the 12F629) combine the frequency with PWM?
>
> I figure this must either be really easy or really hard... If anyone can
> help me out, I'd be in your debt. :)

I don't know how hard your choice for the 12F629 is, but I would use a
12F683 with built-in hardware PWM. Very easy to program. On the
PIC-page of my site you can find some examples (dimmers) written in C.
http://www;robh.nl/picsoft.php.

Regards, Rob.


-- 
Rob Hamerling, Vianen NL (http://www.robh.nl/)
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