Ultrasonic Distance Sensor – HC-SR04

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!

The HC-SR04 has a 5V output (which needs to be reduced to 3.3V to work with the Raspberry Pi).

Features:

• Input Voltage: 5V
• Current Draw: 20mA (Max)
• Digital Output: 5V
• Digital Output: 0V (Low)
• Working Temperature:  -15°C to 70°C
• Sensing Angle: 30° Cone
• Angle of Effect: 15° Cone
• Ultrasonic Frequency: 40kHz
• Range: 2cm – 400cm
• Dimensions
  • Length: 43mm
  • Width: 20mm
  • Height (with transmitters): 15mm
  • Centre screw hole distance: 40mm x 15mm
  • Screw hole diameter: 1mm (M1)
  • Transmitter diameter: 8mm