Andy1845c
Active Member
I have a very old garage door opener remote. I would like another one, haven't looked for a genaric replacment yet, but the "build one" idea came to mind when I saw how basic it looks inside.
I have limited RF experiance. I love radio, but haven't got to building any radio circuits yet.
Questions - Is this flat out dumb idea thats just going to be frusterating? Or is it doable?
What freq. do these things generaly operate at? The PCB is kinda sloppy compared to current standards. Can I assume its somwhat low freq. from that? Khz? low MHz?
What are the things that look like diodes wrapped in fine wire? (in picture 3 they are below the big silver coil)
Lastly - how does this thing work? Don't most modern remotes use a code of some sort? This looks like a crude transmitter that is tuned with an adjustible inductor?
Anyway, just looking for comments/musings.
I have limited RF experiance. I love radio, but haven't got to building any radio circuits yet.
Questions - Is this flat out dumb idea thats just going to be frusterating? Or is it doable?
What freq. do these things generaly operate at? The PCB is kinda sloppy compared to current standards. Can I assume its somwhat low freq. from that? Khz? low MHz?
What are the things that look like diodes wrapped in fine wire? (in picture 3 they are below the big silver coil)
Lastly - how does this thing work? Don't most modern remotes use a code of some sort? This looks like a crude transmitter that is tuned with an adjustible inductor?
Anyway, just looking for comments/musings.