Little Laser Trip Wire circuit presented here can detect movement of people or objects while passing through the laser beam and trigger security alarms as alert signals to those ... home alarm systems ...

Red lazer, how 1980’s. Green lazer, how girly. Blue laser! now that would be cool. as for “tone decoding” again easy to defeat I can easily sample the beam to figure out what the tone is.

Most of us have had a sibling that would sneak into our room to swipe a transistor, play your guitar or just mess with your stuff in general. Now there’s a way to be immediately alerted when … ...

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 ...

March Top 10 Electronic Circuit Articles. Laser door alarm This door alarm is based on the interruption of Laser beam. A low cost Laser pointer is used as the source of light beam. When somebody ...

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 ...