Michael Rigby-Jones wrote: > > A quick simulation suggests approximately 1.6 volts pk-pk with the output unloaded, assuming 5v pk-pk input. Funny - mine says 0.8 V peak-to-peak, more in line with the OP's specs. Could be wrong though. -- Timothy J. Weber http://timothyweber.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist