Detecting obstacles and warning - Arduino, ultrasonic and buzzer

This is tutorial to help you understand ultrasonic and buzzer and go deeper into learning Arduino, follow these steps and give me feedback please.I'm making it to help my cousin in his school project. Prepare your material and tools 1. Test Board2. Ultrasonic sensor3. Arduino cable4. +5V buzzer...
By: Ammar Atef Ali

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[original story: Instructables]

Instructables 12 Feb 00:33