Gary, A few years ago I built 8 relay board for our dyno I used 8 car 32a removable bosch relays with 8 Opto couplers and pic. I may still have the schematic. Andre Abelian Guys, I have an application where I need a low current (5 or 6amp max) relay boards that is powered from ~12 - 15 volts DC (automotive, driven with transistor-level(or ttl/cmos) input, and has all the protection stuff build in. I'd like to have as many relays on the board as possible, but I'm thinking around 5-10 relays/board ballpark. Anyway, just wondering if anyone knew of a commercial product out there that met this or might know where to look. Thanks, Gary -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads