Ultrasonic

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Ultrasonic Sensor

An ultrasonic sensor is an excellent way to detect obstacles.

Example: HC-SR04

Distance 2 to 450 cm

Current 15 mA

  • HC-SR04

  • HC-SR04 schematics

Wiring

Ultrasonic Module VCC (+5V)  — PCB VCC (+5V)
Ultrasonic Module GND        — PCB GND
Ultrasonic Module Trigger    — PCB Digital Pin
Ultrasonic Module Echo       — PCB Digital Pin


An internal schematics of the sensor can be found here.[1]

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