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

  • l50_ultrasonic

  • HC-SR04 schematics

Wiring

Ultrasonic Module Trigger — Arduino Digital Pin

Ultrasonic Module Echo — Arduino Digital Pin

Ultrasonic Module VCC (+5V) — Arduino VCC (+5V)

Ultrasonic Module GND — Arduino GND


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

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