The Ultrasonic Sensor (HC-SR04) is a reliable and accurate distance measurement sensor that uses ultrasonic sound waves to detect objects and measure distance without physical contact. It works by emitting high frequency ultrasonic pulses and measuring the time it takes for the echo to return. This allows your microcontroller to calculate precise distances, making it ideal for robotics, automation, and smart sensing applications. With simple Trigger and Echo pins, it’s extremely easy to integrate with Arduino, ESP32, and other development boards. Whether you're building an obstacle avoiding robot or a smart parking system, this sensor delivers stable and consistent performance. Highlights: Non contact distance measurement using ultrasonic waves. Accurate and stable readings. Simple 4-pin interface (VCC, GND, Trig, Echo). Detection range up to 4 meters. Compatible with Arduino, ESP32 & Raspberry Pi (with proper timing control). Low cost and beginner friendly. Specifications: Model: HC-SR04. Operating Voltage: 5V. Operating Current: ~15mA. Measuring Range: 2-400cm. Measuring Angle:
