Description
The HC-SR04 is a reliable and highly popular distance-sensing module that uses ultrasonic sound waves to detect objects and measure distances without physical contact. Capable of detecting objects between 2 cm and 400 cm with a high degree of precision, it features an integrated ultrasonic transmitter and receiver. It is a staple component in educational robotics and DIY STEM projects, perfect for building obstacle-avoidance robots, automated navigation systems, and proximity alarms. Easily integrated with microcontrollers like the Arduino UNO and Magic Board, it provides an excellent practical introduction to wave physics and sensor programming.








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