Hi guys. It has been awhile since I have logged on here.
I had a garage door opener we bought to move Frankenstein's monster in our halloween ride a few years ago and recently converted it to a new use - opening our garage door. I lost one of the transmitters over the years and they are $40 at the store. Also, they are quite large and I would like one for my motorcycle keychain.
So....I popped the cover off of the xmitter I have and see that it is quite simple. I have not traced out the circuit yet, but I am guessing it is a little microcontroller that sends a pulse stream to a 49mhz? oscillator circuit.
Anyone ever tried to roll their own?