Hello Melanie,


Melanie>>It's NOT going to trip the moment your Sine-wave goes high... so technically the ON period time will be considerably less than the OFF period time. <<

Ok, this is what I thought would happen. Thought if this would happen, I would use a transistor and "Tickle" the base of it, to "Turn on" the PICS probe threshold. (but I didn't really want to do that if I didn't have to).

Melanie>>The entire period (ON+OFF) will be correct for the frequency you're measuring, <<

Thus, you are saying that the PULSIN will read the correct frequency *only* if the wave meets the minumum voltage threshhold for the cycle you are reading. The RCTIME is worthless, because the timeing "ON" will probably be 1/4, 1/8, or even smaller than the timing "OFF" of the RCTIME.

Sounds to me, the PULSIN is the way to go, if I wanted to attempt to proceed with the PIC chip. If that doesn't work, I guess i will play around with the NE567.

Thanks a Million Melanie.

Dwayne