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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.

Step 1: Prepare your material and tools

1. Test Board

2. Ultrasonic sensor

3. Arduino cable

4. +5V buzzer

5. Male to male pins

6. Arduino uno board

Tools and materials are shown in the pictures.

arduinohelper. simdif.com
<p>Great intructable ^_^ Here's mine: <a href="https://youtu.be/tl9uDUr10xY?list=PLUf1E7DXqsCvVQ56yFzpO1OO22iZPvi5-" rel="nofollow">https://youtu.be/tl9uDUr10xY?list=PLUf1E7DXqsCvVQ56yFzpO1OO22iZPvi5-</a></p>
<p>please help me friend i want use a relay or something ( your recommend ) and 220v an alarm </p>
Use relay it is easy, but first find suitable relay
<p>how can use a relay not buzzer, i want to use 220v an alarm ?</p>
<p>It is recommended to use opto couplers instead of relays</p><p>put the input on it instead of buzzer.</p><p>If you need i can work on it for you, just tell me<br>Thanks for your comment</p>

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