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This project was my very first Maker Faire NY project in 2011! This was a covert security system using sensors, which when tripped, would change the background of my computer screen. To demo this project at Maker Faire, I used a doll house and wired up several ping motion sensors in the rooms - each one that got tripped by someone entering the room would change the background screen on my computer to a different picture.
I was "inspired" to build this secret detection system so I would know when someone unauthorized went into my bedroom but they would not realize I was alerted so I could catch them if I wanted to! Make Magazine featured my project in Volume 20 - you can see the article here.