hello i just writing this tofind out how to use ultra sonics. how doi put them in to a circuit. how do they work aswell does anyone know. do they work just like a switch.
They are speakers that emit ultrasonic soundwaves..
They can be used as a simple switch if one is emitting a constant wave and the other is recieving.. If the reflected sound is intense enough (depending on your comparator) then it will switch at a given distance.