HC-SR04 Ultrasonic Sensor Module for Arduino

The HC-SR04 Ultrasonic Range Finder is a widely used sensor in applications requiring distance measurement and object detection.

The module features two eye-like projections on the front, which serve as the ultrasonic transmitter and receiver. The HC-SR04 uses sonar to determine the distance to an object, similar to how bats and dolphins navigate.

This ultrasonic sensor module combines a transmitter, receiver, and control circuit into a single, compact package. It offers excellent range accuracy, stable readings, and is easy to use. Unlike Sharp rangefinders, its operation is unaffected by sunlight or black materials, although acoustically soft materials like cloth may be harder to detect.

The Trigger and Echo pins are the input/output (I/O) pins of the module and can be easily interfaced with a microcontroller or Arduino. When the receiver detects a returning wave, the Echo pin goes high for a duration proportional to the time taken for the wave to return to the sensor.

The HC-SR04 Ultrasonic Ranging Module provides non-contact distance measurement capabilities within a range of 2cm to 400cm, with an accuracy of up to 3mm.

HC-SR04 Ultrasonic Wiring:

• +5V (Power)
• Trig (Control)
• Echo (Receive)
• GND (Ground)

Specifications:

HC-SR04 Ultrasonic Range Finder Sensor:

• Accuracy: ~0.3cm
• PCB Dimensions: 4.5 × 2.0 cm
• Connections: VCC, Trig (Control), Echo (Receive), Out, GND

Check the Arduino for beginners kit if you are now starting your adventure on Arduino.

Features:

• Measures distances within a range of 2cm to 400cm
• Stable performance and accurate distance measurement
• High-quality acrylic mounting bracket
• High-density, durable construction
• Minimal blind distance

Package Includes:

• 1 x HC-SR04 Ultrasonic Range Finder

External tutorials on SR04 Sensor:

• Getting Started with the HC-SR04 sensor

• Complete Guide for Ultrasonic Sensor with Arduino

• Simple Arduino and HC-SR04 Example