YourITronics

We all know the Sony Blu-Ray replacement drive assembly for the PS3 and the Blu-Ray Laser phaser project i mentioned in a past article. So we know its possible to build a Blu-Ray Laser with one of these modules, but what makes this project better than others ? It seems the author payed a little more attention to details and added a current-limited power supply opposed to the simple resistor based design. The project also features rechargeable Li-Ion batteries with charging jack on the back and a protection circuit module for Li-Ion batteries. So you can see now that this project brought many improvements to the original one.

Blu-Ray Laser Pointer: [Link]

The idea of the project is to use two mirrors, two motors to move the mirrors, a laser pointer, and a PIC microcontroller with serial input to receive the image from the host computer and control the mirrors and laser. The image will be conditioned in and transferred by Processing. The result will be an image that looks a bit like a big POV or a red and black old style computer display. The project its still a work in progress because only control of the x axes was realized, next the author will add control on the y axes and the project should be finished.
Laser Display POV: [Link]

The basics of this design is similar with television principles: the laser beam is reflected by the mirrors placed on each face of the octagonal head creating a raster. This raster is modulated by turning on/off the laser beam. The Microcontroller board receives one pulse per rotation from the rotational speed sensor and calculates very precisely the moment for turning on/off the beam.
Mechanically scanned laser display: [Link]

Protect Your Home with Laserbeams - video powered by Metacafe
Here is an easy to make and powerful laser alarm system that can protect your entire home, indoors or out! My inspiration for this project came from Brad Graham & Kathy McGowan. Watch the video for details and the Test Results. You’ll be impressed. I hope you enjoy this Instructable.

DIY Laserbeam Alarm: [Via]

Team Cynergy presents this article with step by step instructions on how to program an electronics kit to use a laser as motion detector and fire a gun with the sensor is triggered. The paintball gun can cause serious injuries if not used correctly. So be careful how you use this project if you decide to build it, don’t start making bad jokes on your friends because someone could get hurt. Good lock with the project.