Hi Robert, There are commercial 'learning' RF fob-type remotes available at around 24 USD. These can capture your exeisting remote codes, and will then reproduce them. There are two things to watch out for, though. Make sure the carrier frequency they use is the same, and note that these *do not* work with code-hopping type systems. Check out http://www.aaaremotes.com/skyl66tran.html ; these guys also have a compatibility chart on their site. Regards, Anand Dhuru ----- Original Message ----- From: "Robert Ussery" To: Sent: Thursday, July 17, 2003 9:04 AM 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! - Robert www.geocities.com/uavbob -- 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: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics