HC SR04 Ultrasonic sensor

An ultrasonic sensor is a device that uses ultrasonic waves (sound waves at frequencies higher than the human hearing range, typically above 20 kHz) to measure distances to objects. It operates by emitting a pulse of ultrasonic sound and then detecting the echo that bounces back from the object. The sensor calculates the distance based on the time it takes for the echo to return.

Ultrasonic sensors are widely used in various applications including:

• Distance measurement: Determining the distance between the sensor and an object.
• Obstacle detection: Helping robots and vehicles avoid collisions.
• Level sensing: Monitoring the level of materials in containers or tanks.
• Object detection: Identifying the presence and proximity of objects.

These sensors are valued for their accuracy, reliability, and ability to work in various environmental conditions.