Ultrasonic Distance Sensor - HC-SR04 (5V)
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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.
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!
This sensor has additional control circuitry that can prevent inconsistent \"bouncy\" data depending on the application.
**Features:**
* Operating Voltage: 5V DC
* Operating Current: 15mA
* Measure Angle: 15°
* Ranging Distance: 2cm - 4m
**Documents:**
* [Datasheet](https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf)
* [Example Tutorial](http://www.instructables.com/id/Simple-Arduino-and-HC-SR04-Example/?ALLSTEPS)
* [GitHub](https://github.com/sparkfun/HC-SR04_UltrasonicSensor)