This is the HC-SR04 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.
This sensor has additional control circuitry that can prevent inconsistent "bouncy" data depending on the application.
There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!
|
Number |
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. |
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|---|---|---|---|---|
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