Are you constantly being scared when people sneak up behind your back? Do you have bad hearing and can't hear people approaching you? Do you want to just build a super fun Arduino project?

If you answered yes to any of those questions, then this project is for you! I have a workbench in my basement that I use all of the time for homework and projects. The bench is right next to my furnace which is very loud when running. Whenever someone comes in my basement, it scares the life out of me. I made this to alert me when someone is coming. This is a motion alarm system that alerts you whenever motion is detected around you. It uses an Arduino Uno to control the PIR motion Sensor, LED, and the speaker. It is all enclosed and fits in a box from a deck of cards! It is powered using the USB power cord for the Arduino. To program the Arduino, you can make your own sketch, or use mine in the upcoming step. The whole project will probably only take you a day or two and anyone should be able to do it. I am 14 years old, and lacking the ability to buy a lot of parts, so I try to do the best with what I have.

Step 1: Tools and Materials

Not many materials or tools are required for this project. I only spent about $13.00 on this project.

An Arduino Uno
Parallax PIR Sensor (RadioShack- $9.99)
A PC Board (RadioShack- $2.49)
Assorted Wire. (Depending on how far away you want the sensor to be)
Small Speaker (anything should work)
Card Box (optional)
Some spray paint
Zip Ties (optional)
An LED of your choosing

Wire Strippers
A Small Saw
A Drill or Drill Press
A computer and Arduino USB cable
Soldering iron

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