Hi all has anyone done any exploratory/repair work on these sort of things? You know the ones, they operate in the 433MHz band I think, and you set some DIP switches on both bell push and receiver so that the codes match.
I know they are cheap rubbish, and the attrition rate is high; nevertheless I am thinking of taking a closer look at one that has stopped working. My first guess was imply that the press switch had failed; but it's a PCB mounted switch with an ON resistance of 50Ohms, which seems at least hopefull.
There is some failry shonky soldering, some of which I will probably redo. There is also a little rust on a 3-wire metal cased part with '433.920' marked on it; a SAW filter I assume? I guess this may have failed, but the LED on the bell push doesn't go on when you press the switch, and I think this is independant of the oscillator/transmitter. Oh, and yes I checked the batteries...
As I say, not a big deal, but I'd be interested if anyone knows of any common failure modes before I get in too deep...
Thanks (and a ding-dong New Year to you all!) Jon N