The Arduino powered Laser trip wire system project is currently over on the Kickstarter crowd funding website looking to raise $3,000 pledges to make the jump from concept to production.

That’s when I saw several instructables (Laser Tripwire Alarm, Arduino – Laser Tripwire Alarm System, and Super Easy Laser Tripwire, among others) using a laser tripwire.

[Ronnie] built a laser trip wire complete with an LCD screen and keypad for arming and disarming the system. The brains of the project is an Arduino. There’s a keypad for inputting pass codes ...

How to build a laser trip wire alarm with Arduino. As a preview of his latest book, Arduino Project Handbook: 25 Practical Projects to Get You Started, Mark Geddes takes us through the project to ...

Instructables user [1234itouch] recently built a simple laser tripwire alarm that can be mounted ... along with an Arduino and a 12-button key pad. A laser pointer is aimed at the photo cell ...