HC-SR04 Ultrasonic Sensor 4pin

Ultrasonic ranging module HC-SR04 provides 2cm – 400cm non-contact distance measurement function, the ranging accuracy can reach up to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit.

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SKU: AB043 Category:

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Description

Ultrasonic ranging module HC-SR04 provides 2cm – 400cm non-contact distance measurement function, the ranging accuracy can reach up to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit.

The basic principle of work:

  • The module should be triggered by pulling Trigpin high for at least 10uS.
  • The Module automatically sends eight 40 kHz pulses and detect whether there is a echo back after bouncing off any obstacle in front of it.
  • If their is an echo back, the module pulls up the echo line high for a duration it takes for the waves to go to the obstacle and return. 

Test distance = (high level time×velocity of sound /2)

  1. 5V Supply
  2. Trigger Pulse Input
  3. Echo Pulse Output
  4. GND

More details:

  • Power supply :5V DC
  • Quiescent current : <2mA
  • Effectual angle: <15°
  • Ranging distance : 2cm – 500 cm
  • Resolution : 0.3 c

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