michael brown wrote: > > > Something like this? > > > > http://www.web-ee.com/Schematics/TDR/tdr.htm > > Nifty circuit, but the first thing I would do is replace the existing chip with a SN74F04 from TI. This should speed up things considerably. Larry -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body