Russell,

> I have used a properly designed resistive input from mains to
> processor pin
> with no problems.

Well, based on what you and Roman have input here the following would
work for 240VAC (assuming shitty Australia and New Zealand power);

* Two resistors in series - say 3~4M each
* 5.1V Zener from Pin to GND - only small wattage, I assume is OK
* up to say 100nF Metalised cap (rated at 400V) strapped across Zener

OR

* a pair of Schottky diodes on input pin

Yes?

Ho do you feel about sinking the gate current to a PIC pin through a
single resistor - if maintained at around 5mA?

Regards,

Sean

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu