How an Ultrasonic Sensor Works A micro computer sends a electric pulse to ultrasonic sensor via a GPIO Pin. The ultra sonic sensor intern sends out a sound wave. The sound wave bounces off an object ...

3. Component Knowledge HC-SR04 Ultrasonic Sensor: Like bats, sonar is used to determine the distance to an object. It provides accurate non-contact range detection, high-precision and stable readings.

In this module we will wire up an ultrasonic sensor and attach it to our Raspberry Pi. Using the ultrasonic sensor we will measure the distance an object is away from the sensor. The distance of the ...

Using a Raspberry Pi mini PC together with inexpensive HC-SR04 ultrasonic sensors as inputs, the system generates MIDI notes which can be played through a synthesizer on the Pi to output high ...