My project is a security alarm. Using an Arduino, I was able to create an easy-to-use, and cost-efficient security alarm (a working physical device) using distance to detect a person that could potentially be breaking in. And, of course, if the distance reaches a maximum of 40 centimeters or less, the buzzer will sound along with the appearance of a red LED light. I also displayed the distance on an LCD screen (also connected to the Arduino) to give the owner an insight of how far away the person is. It also runs on a battery after coding the Arduino, which is another pro of using an Arduino. So, the code will be saved, but it can still be attached to a battery. I decided to make this because it is a cost-efficiet way to keep my family and I safe from the many burglaries that occur, and I wanted make this any easy-to-use device, not where it requires much set-up. With multiple of my security alarms set around the house, you will be safe!!!
Here is an Image of my project with everything labeled!