Herbert Graf wrote:
>
>         True, for the one with full position feedback (the throttle BTW) I was
> thinking of using the "resister and capacitor hanging off a port and timing
> the time constant" method, I don't need high accuracy and I believe this
> should be "good enough" for that purpose. Aside from that I have no qualms
> over adding a chip (got a TON of SPI ADCs lying around in my bins) so my
> might just use a real ADC. TTYL



Herbert, thinking again of safety, if the PIC fails
and locks up, you would expect the output pin to stay
LOW or HIGH. I would try and design the driver hardware
so that it needs the PWM in a specific range to keep
the throttle open, and any sustained high or low at
the pin would result in a closed throttle.

Then you only have to worry about the very rare fault
that may leave the PIC oscillating with the output
pin oscillating, but i'm sure you could add extra
safeguards around this.
-Roman

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