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Maha Bodhi School, Victoria School, Anderson JC, LASALLE College of the Arts

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Lazing, Hobby Crafting, DIY, Graphic Design, Computer Stuff that you don't get it

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Friday, July 17, 2009
Project RedBeam
[ZOMBiE CyGiG] ranted at 2:01 AM --- Post#5707380720029420648

Project RedBeam is about creation of a higher power laser from home. Its now successful.

It is all about using DVD writer laser to make a powerful laser that is suppose to cut black paper, pop ballon, light match and some other burning stuff.

Basically, its split into 4 parts:
1. Sourcing for materials
2. Dissection of a DVD Writer to obtain diode
3. Using strip board to build a current limiter
4. Wiring and final assembly

I burnt 2 laser diode in the project. The first one by connecting it directly to 9V battery. The second by accidentally pushing the current on the limiter too high. A third diode was DOA. I went thru the back alley of Sim Lim Square and ask unkers from PC repair shop to sell me second hand DVD writer for cheap cheap price. This is the pile of disassembled DVD writers.

Salvaged some of the motors, shock absorber, metal rods and other stuff for future use.

This is how the final product looks like.

Safety switch.

Top View.

Laser fired.

This is how you hold it. Quite small, but bigger than conventional laser pointer.

Fire button.

[Click to see larger picture]

This is the internals. The stripboad is the current limiter. There is a pot to adjust how much current to pass through. I used 155mA. Typically, according to a Sony DVD laser diode data sheet. Typical is 2V 150mA, max is 3V 170mA.

Shining in my dark room.

Ignore that dumb pikachu, shining through my living room. Note the beam, the laser is just on the left of the camera.

Testing current: 152.6mA

Testing Voltage: 2.600V

Laser painting - heart. (Nicer than WK's)

"Fuck" Graffiti Style

My signature.



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