Best Pic'ers, I=92m trying to measure a frequency created from an RC oscillator using = a 16F877. My problem is that my program takes to long to "find" the frequency, and it never stabilizes even though the input signal is constant. Have anyone done this before using CCS or any other C-compiler? Any idea how to do this? Right now I=92m trying to calculate amount of interrupts I get during a specified time period (Using built in timer)... but as I said... It never stabilizes well enough. So which pin is best to measure with? And which kind of auto ranging method is best to use to get a fast an accurate measurement?=20 Any input is highly appreciated. Thanks, Lars T -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.