Does anyone know of a link to somewhere for power line and serial transmission on the same two wires. I have several different 12c508 parts that I would like to network with only two wires. I dont think that this is a difficult thing to accomplish, but I haven't been able to find much and be able to do it really cheap and with very few components. Also there could be as many as 28 chips plus the master who will control all of the traffic, I plan to use a protocol similar to the I2C. Any links would be very helpful Cory D. Raak Electronics Technician PCB Developer Gentex Corporation Email coryr@gentex.com "You either do or do not. There is no try." Yoda