기능

• Description
• 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