Hi David, I think you have that backwards (at least for most servos). The high time ranges from 1ms to 2ms, not the low time. Sean At 02:34 PM 4/23/01 -0500, you wrote: >"servo" PWM: typically repeats at 20 to 70 Hz; 1 ms lo for reverse; 1.5 ms lo >for neutral; 2 ms lo for full forward, hi for rest of period. -- 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