HC-SR04 Precision Ultrasonic Sensor
Ultrasonic Sensor Pin Configuration
Pin Number |
Pin Name |
Description |
1 |
Vcc |
The Vcc pin powers the sensor, typically with +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. |
HC-SR04 Sensor Features
- Operating voltage: +5V
- Theoretical Measuring Distance: 2cm to 450cm
- Practical Measuring Distance: 2cm to 80cm
- Accuracy: 3mm
- Measuring angle covered: <15°
- Operating Current: <15mA
- Operating Frequency: 40Hz
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