Ultrasonic
ranging sensor is
an economical sensor module that provides 2cm to 400cm of non-contact
measurement functionality with a ranging accuracy that can reach up to
3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver
and a control circuit.
There are only four pins that you need to
worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive),
and GND (Ground). You will discover this sensor simple to set up and
use for your next range-discovering venture utilizing an Arduino or
Raspberry Pi
