Sometimes security doesn’t need to be overly complex to be effective. Instructables user [1234itouch] recently built a simple laser tripwire alarm that can be mounted virtually anywhere, comp… ...

If you are interested in reading more about laser tripwire security systems, check out this similar passcode-based system, this alarm system built into a toy, and this Arduino-based alarm system.

How to create a simple laser trip wire alarm, taken from theArduino Project Handbook: 25 Practical Projects to Get You Started.

In the video above, MAKE Magazine shows how to create your own laser tripwire for just a few dollars worth of electronics equipment. If you want to get into the nitty-gritty, you may need some ...

Sure, you could opt for a laser tripwire that puts intruders on blast via Twitter, but there's something to be said for the simplicity of the latest security system to come from Instructables user ...

How a 12 Gauge Tripwire Alarm Works A 12 gauge tripwire security alarm is a device that uses a tripwire mechanism connected to a 12 gauge blank-firing system. When an intruder trips the wire, it ...