Is it feasible to drive the LED of an optocoupler directly from
one of the PIC port pins configured as an output if the frequency
is less than 300Hz and the cable distance is about 150 meters?

I checked the result on a CRO and after passing the signal through a
Schmitt trigger inverter, and all seemed OK. I was wondering about
the loading effects on the PIC output pin.

Thanks for any help..

Tony


Just when I thought I knew it all,
I learned that I didn't.