Ha ha My original question certainly went off in a strange direction. I really wanted to know a reliable way to detect emergency vehicles with their flashers on. I had no plans to simulate an emergency vehicle. If I detect emergency vehicles will I get in trouble ? Are there laws against this ? Gus S Calabrese 303.964.9670 vm 303.908.7716 cell no vm www.omegadogs.com 4337 Raleigh St Denver, CO 80212 -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads