Hi everyone,I was wondering if anyone has messed with a IR beam on a garage door. Im building a project and it doesnt seem that the beam is a simple high/low when it is broken. Anyone know exactly how they work.I see a DC voltage on the 2 wires but it doesnt toggle high to low or visaversa. It does change but only a small amount. I would like to use a interrupt input to detect this too.Thansk for any help
I don't believe the IR sensors are simple photodiodes, they communicate with the door opener with some proprietary protocol.
The beam does indeed, as i suspected, contain a pulse stream. I found this out by using a scope and I can see the pulse stream. It is running at around 155hz (yes hz). I checked my neighbors and he has a genie garage door opener and his is the same.