This neat little $2 DIY alarm will alert you when people are touching your stuff. It’s not a full blown house security system, but it will work just like a house alarm. When an object you’ve left in place moves, an alarm goes off. It’s cheap and easy to make alarm system that will make your friends and enemies think twice about touching your stuff!
Materials Needed for this DIY Project:
– 2 impact alarms
– Tilt switch
– Neodymium magnet