Ultrasonic Sensor Distance Measuring Module HC-SR04

Ultrasonic Sensor Distance Measuring Module HC-SR04

The Ultrasonic Ranging Sensor HC-SR04 is one of the common distance sensors for Arduino projects. It works extremely well with any Arduino Board. The basic principle of this device is that it sends a sound wave, hits an object, and return back to the sensor. The time is multiplied by the speed of sound with the following computation: 343m/sec 0.0343cm/μs = [1/29.1] cm/μs approximate to give the total distance traveled by the ultrasonic beam. Which then is then divided by 2.

Simply: Distance = (Time for wave to return * Speed of sound) / 2

Specifications:
✅The power supply is 5VDC
✅Effective angle for computation: < 30 degrees
✅Ideal distance: 2cm to 500 cm
✅Resolution: 1 cm
✅Ultrasonic Frequency: 40k Hz