The HC-SR04 module includes ultrasonic transmitters, receiver and control circuit. You only need to supply a short pulse to the trigger input to start the ranging, and then the module will send out ...

Technically speaking, double-sheet detectors are thru-beam sensors with separate emitters and receivers. The emitter sends the ultrasonic sound wave while the receiver senses the amount of sound ...

It has become a common sight, a must-have feature on modern cars, a row of ultrasonic sensors embedded in the rear bumper. They are part of a parking sensor, an aid to drivers for whom depth percep… ...