Yeah we know Halloween is over, but what better time for the zombie invasion to begin than when you let your guard down? With this easy Arduino project from MAKE, even beginners can be protected. Simply breadboard a PIR sensor, LED and buzzer and connect them to your Arduino. Then upload the code to your board to detect motion from the PIR and activate the LED and buzzer. This is a fun way for newbies to learn about digital IO and protect against the zombie apocalypse at the same time!
Code and instructions can be found on the MAKE project page.