Ultrasonic Distance Sensor HC-SR04
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The HC-SR04 ultrasonic distance measuring sensor is a non-contact device used to measure distances by sending out ultrasonic waves and measuring the time it takes for the waves to bounce back after hitting an object. It is commonly used in robotics, automation, and DIY projects to determine the distance of objects or to create obstacle avoidance systems. The HC-SR04 consists of an ultrasonic transmitter and receiver, and can measure distances between 2 cm and 400 cm with good accuracy. The sensor communicates with a microcontroller (such as an Arduino) through digital signals and requires a small amount of programming to use.
The HC-SR04 sensor allows very easy ultrasonic distance measuring. The small PCB contains the ultrasonic transmitter, receiver, and control logic. Only 2 digital ports are needed to connect the sensor to a microcontroller; an example code for Arduino is available in the download section below.
The operation voltage is 5V, and power consumption is just about 2mA. The measuring angle is about 15 degrees.
- Operating Voltage 5V
- Current Consumption ca. 2mA.
- Measuring Distance 2-400cm.
- Measuring Resolution ca. 3mm.
- Dimensions 20x 16 x 45 mm, 8.3g
User Guide to HC-SR04 Ultrasonic Distance Sensor for Arduino
Arduino Demo Sketch Distance Measurement
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