Ultrasonic Wave Detector Sensor HC-SR04
The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object – just like bats or dolphins do. This module offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material (although acoustically soft materials like cloth can be difficult to detect). It is similar in performance to the SRF05 but with the low-price of a Sharp infrared sensor. Perfect for collision avoidance on your next robotics or multi-rotor project!
Features:
- HC-SR04 ultrasonic module can offer non-contact distance sensing function, the range of which is 2cm-400cm and the range accuracy is up to 2mm; the module includes ultrasonic transmitter, receiver and control circuit.
- Working Voltage: 5V(DC)
- Static current: Less than 2mA.
- Output signal: DC3.3-5V
- Sensor angle: Not more than 15 degrees.
- Detection distance: 2cm-450cm.
- High precision: Up to 0.3cm
- Input trigger signal: 10us TTL impulse
- Echo signal: output TTL PWL signal
Specifications:
| HC-SR04 | |
| Working Voltage | 3.3V / 5V compatible Wide voltage level: 3.2V – 5.2V |
| Measurement Range | 2cm – 450cm |
| I/O Pins needed | 4 |
| Operating Current | 2mA |
| Dimensions | 45mm x 20mm x 16mm |
| Ease of pairing with Raspberry Pi and Arduino | Easy, directly connect to I/O of Raspberry Pi
Has Grove Connector for easy connection to Arduino |
Pin Out:
| Pin Number | Pin Name | Description |
| 1 | Vcc | The Vcc pin powers the sensor, DC3.3-5V |
| 2 | Trigger | Trigger pin is an Input pin. This pin has to be kept high for 10us to initialize measurement by sending US wave. |
| 3 | Echo | 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. |
| 4 | Ground | This pin is connected to the Ground of the system. |
Drawing:
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