> Herbert, look in the PIC archives, there was someone who built a
> multi-channel decoder. You can write the code to just count while testing
> for the edge, after finding the rising edge of the servo pulse. You can
> also do it using a timer and interrupt on pin change.
>
> The tricky part is the analog feedback from the mechanics which requires
> an A/D. You can try the digital A/D approach but maybe better try to use a
> 16C711 which already has an A/D inside. An A/D is harder to make than a
> CCP ;-).

        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

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads