Easy Ultrasonic Sensor Siren

Part list:

  • Ultrasonic sensor
  • Pezo (I used a big one)
  • Some wires

OK, lets begin.

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Step 1: Connect the Ultrasonic Sensor and Pezo

Trig pin to pin 4, echo pin to pin 3 and pezo positive pin to pin 12.

Step 2: Code

Download the code form here:

Step 3: Finished

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