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 create a simple laser trip wire alarm. You've probably ...

You might be interested in a new Arduino ... simply aim the laser directly at one of the four sensors!” So if you think Laser trip wire system is something you would like to build yourself ...

Here it is created by a single laser beam, a small light sensor brick, and a series of optional reflectors/mirrors. In this article you will learn how to build a laser trip wire out of inexpensive ...

What's a security system without lasers, though? 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 ...

[Ronnie] built a laser trip wire complete ... to the Arduino. When the laser beam is interrupted, the output voltage drops, the Arduino sees that voltage drop and then turns on the alarm buzzer.