Arduino HC-SR04 Security Alarm

by Arduino Tech in Circuits > Arduino

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Arduino HC-SR04 Security Alarm

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Arduino HC-SR04 security alarm will alert you if anyone comes in front of it by turning on a buzzer. It is an easy to make fun project that you can build quickly. Lets get started !!

Materials Required

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1. Arduino UNO

2. HC-SR04 Ultrasonic distance sensor

3. Buzzer

4. Breadboard

5. Wires

6. Arduino USB cable

7. Computer with arduino IDE

Wiring

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HC-SR04

Vcc - 5v

Gnd - Gnd

Trig - Digital Pin 13

Echo - Digital Pin 12

Buzzer

Vcc - Digital Pin 11

Gnd - Gnd

Programming

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It is not necessary to switch on a buzzer, you can switch on different things for example you can switch on your computer when you sit in front of it by using a relay. You can change the code and try different things.

Downloads

HC-SR04_Security_alarm.ino