Is this a mechanical encoder? Really long signal lines? I don't understand why you are having to deal with bounces. The encoders I've used had clean outputs. Jeff ----- Original Message ----- From: SkinTech [sorry, send at first without tag. therefore resend] Hi all, I always try to solve my own problems (I learn from it) but this one has me stumped. My project has a 16F74, reading the output of a rotary encoder (2 bit), see below. First I check by polling if there is a change in the 'A' bit. If so, I wait some 10mS (debounce) and then look again. If there is still a change, I check if it is 1>0 or 0>1. In each case, I then check the 'B' bit to determine direction. For debugging I beep once (CW) or twice (CCW) the buzzer. When turning the encoder I get seemingly random results. Sometimes it beeps 3 times, or 4 times, or 1 time, or not at all over half a revolution. Then it starts again. I'm pretty sure it has to do with the debounce, but I can't get it right. I must add that the beep adds another 10 or 30 mS delay between pollings. The encoders are spec'd at <5mS chatter. Has anyone experience with decoding rotary encoders? Any help or ideas would be greatly appreciated. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics