Personal Security System using arduino
Here is just a simple guide on how to create your own mini “security system” using an Arduino. This is just a fun project, please don’t actually rely on this device to keep your house secure! This design uses an arduino, a HC-SRO4 Ultrasonic Sensor, a Buzzer, and some LED’s. Ultimately from this tutorial, I hope you learn how to use a buzzer and LED’s to display how far away an object is from the ultrasonic sensor.