The HC-SR04 ultrasonic sensor is a popular and cost-effective module used for non-contact distance measurement. It works by emitting ultrasonic sound waves and measuring the time it takes for the echoes to return after bouncing off an object. This time is then used to calculate the distance. The module includes an ultrasonic transmitter, a receiver, and control circuitry. It's widely used in robotics, automation, and interactive projects for obstacle avoidance, distance sensing, and level measurement.
Specifications:
Operating Voltage: DC 5V Operating Current: <15mA Ultrasonic Frequency: 40kHz Maximum Range: 400 cm (4 meters) Minimum Range: 2 cm Accuracy: Up to 3mm Dimensions: 45mm x 20mm x 15mm Weight: 10 grams
