Have you tried putting an RF meter (freq counter) on it and then hooking = your scope up to the antenna and the common on the chip? Many times = this=20 will let you see the freq that is being transmitted on and what is being = sent. From their you just duplicate it. With that setup it can't be=20 too difficult :) Jeremy ----- Original Message ----- From: "Robert Ussery" To: Sent: Wednesday, July 16, 2003 11:34 PM Subject: [OT]: Raynor garage door opener protocol Hi, all. I'm getting mighty sick of my garage door opener falling off of my = visor, so I decided to build it into my Miata's panel. One problem: the remote = costs ~$50, so I don't want to mess with it, especially since I think I can = build one for a couple bucks. I opened the remote up, and it has a really = simple circuit with one IC, a bunch of resistors, a couple of capacitors, and = two inductors. The main problem is that I have little or no experience in RF design, and no knowledge of Raynor's RF signal format (proprietary?), so = I don't know exactly what the IC does. I think it's a Raynor chip (it has = a big R on it, and it says "125CO218" and below that "981864"), but I'm = hoping that it has some commercially available equivalent. Guesses, anyone? One other thing... I don't see any means of tuning the transmitter (like = on an Overhead Door garage door I had a while back had a bunch of DIP switches), except that it has a variable inductor on it. How can I make = sure that a different remote (either a commercial one, or a home-built) will = work with my door? Thanx! -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics