Im struggling to find or to describe what i need. Im looking for a sensor that you can wave you hand in front of to turn something on or off ( in this case opening a door that part i have sorted i just need the contactless input ) . Kind of like you would have on a hands free soap dispenser.
So its like a IR motion detector but all the ones i can find are for burglar alarms or a massive field of operation like a whole room.
Any guidance or what this is or how i can find one would be fab. Im looking for something that i dont need to make myself i.e off the shelf.