Hello all, Here is the schematic for the front end and the counters of the=20 frequency counter that I am building. http://jescab2.dyndns.org/pub_docs/freqcountfrtend.jpg Thanks, rich! Jan-Erik, That's beautiful! Thanks, rich! --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .