HC-SR04 Ultrasonic Range Finder

• Power Supply: 5V DC
• Ultrasonic Frequency: 40 Hz
• Resolution: 3 mm
• Measure Angle: 15°
• Ranging Distance: 2 - 400 cm

The HC-SR04 Ultrasonic Range Finder is an economical sensor that provides 2 to 400 cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3 mm. 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 to use for your next range-finding project!