Hc Sr04 Hc Sr04 Arduino Ultrasonic Sensor

HC-SR04 Ultrasonic Distance Sensor Module:
The HC-SR04 Ultrasonic Sensor is a widely used distance measurement module that provides accurate and non-contact distance sensing using ultrasonic waves. It is an essential component for Arduino, Raspberry Pi, and robotics projects, enabling devices to detect and measure obstacles with high precision.
The module operates by emitting an ultrasonic pulse and measuring the time it takes for the echo to return after reflecting off an object. Using this time delay, the sensor calculates the distance to the target based on the speed of sound. It offers reliable measurements ranging from 2 cm to 400 cm with an accuracy of around ±3 mm.
The HC-SR04 is simple to interface with microcontrollers, requiring only four pins (VCC, Trig, Echo, GND) and standard 5V DC power. Its low cost, high accuracy, and ease of use make it a favorite for robotic obstacle avoidance, distance measurement, and automation systems.

Key Features:
Model: HC-SR04 Ultrasonic Sensor Module
Operating Voltage: 5V DC
Working Current: 15 mA (typical)
Frequency: 40 kHz
Measuring Range: 2 cm to 400 cm
Accuracy: ±3 mm
Measuring Angle: <15°
Interface: 4 pins (VCC, Trig, Echo, GND)
Trigger Input Signal: 10 µs TTL pulse
Echo Output Signal: Proportional to distance
Dimensions: 45 mm × 20 mm × 15 mm

Applications:
Obstacle avoidance in robotics
Distance measurement and mapping
Level detection (water tanks, containers, etc.)
Smart parking systems
Security and object detection systems
IoT and automation projects

Advantages:
Accurate non-contact distance measurement
Simple 4-pin interface compatible with Arduino and Raspberry Pi
Low power consumption and high stability
Compact, lightweight, and cost-effective design
Excellent choice for beginners and hobbyists