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 the US wave. |
| 3 | 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. |
| 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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