HC-SR04 overview
The HC-SR04 is an Ultrasonic Sensor For Arduino. Main ratings: Power Supply +5V DC; Quiescent Current <2mA; Working Current 15mA; Effectual Angle <15°. This page brings together the HC-SR04 pinout and key specifications, with the full datasheet PDF to preview below or download.
HC SR04 HC-SR04 Ultrasonic Sensor is also called HC-SR04 Ultrasonic Range Finder. Ultrasonic Sensor module HC-SR04 provides a 2cm – 400cm non-contact measurement function, the ranging accuracy can reach 3mm. The modules include ultrasonic transmitters, receivers, and control circuits.
The ultrasonic sensor uses sonar to determine the distance to an object like bats or dolphins do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package. From 2cm to 400 cm or 1” to 13 feet. Its operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). It comes complete with the Ultrasonic Sensor transmitter and a receiver module
Key specifications
Datasheet
HC-SR04 features
- HC-SR04 Ultrasonic Sensor: Measures distance using ultrasonic waves.
- Non-contact measurement: Does not require physical contact with objects.
- High accuracy: Provides precise distance measurements with centimeter-level resolution.
- Wide measuring range: Capable of measuring distances from a few centimeters up to several meters.
- Fast response time: Provides distance measurements in microseconds.
- Adjustable sensitivity: Can be calibrated for different environments and target materials.
HC-SR04 pinout
| Name | Description |
|---|---|
| Vcc | The Vcc pin powers the sensor, typically with +5V |
| Trigger | The trigger pin is an Input pin. This pin has to be kept high for 10us to initialize measurement by sending a US wave. |
| Echo | The echo pin is an Output pin. This pin goes high for a period of time which will be equal to the time taken for the US wave to return back to the sensor. |
| Ground | This pin is connected to the Ground of the system. |
HC-SR04 specifications
| Power Supply | +5V DC |
|---|---|
| Quiescent Current | <2mA |
| Working Current | 15mA |
| Effectual Angle | <15° |
| Ranging Distance | 2cm – 400 cm/1″ – 13ft |
| Resolution | 0.3 cm |
| Measuring Angle | 30 degree |
| Trigger Input Pulse width | 10uS minimum |
| Dimension | 45mm x 20mm x 15mm |
HC-SR04 applications
- HC-SR04 Ultrasonic Sensor: Measures distance using ultrasonic waves.
- Widely used in robotics for obstacle detection and avoidance.
- Suitable for measuring fluid levels in tanks and containers.
- Used in parking assist systems for detecting the proximity of objects.
- Can be integrated into home automation systems for occupancy detection.
- Ideal for measuring distances in autonomous navigation systems.
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