The Pocket Laser Vortex of DOOOOM will project a cone of laser light and give a spooky effect to spice up any Halloween party. A bit of party smoke and it will look like the gateway to Hades has opened. It uses a standard laser pointer and a few simple bits and bobs from around your workshop.
This is an entry in the HALLOWEEN competition
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The idea for this was spawned after seeing Mever's Laser Vortex. My version is rather more compact.
Step 1: Tools and Materials
Building the Laser Vortex of DOOOOM does need some simple soldering so you will need soldering iron, solder and wire cutters. You will also need some way of making a 3/4" (17mm) hole in plastic. The best tool for this is a step or cone drill, but there are dirtier ways of doing this if you haven't got the drill. A round file would be useful here as well. It's all held together with glue from a hot glue gun.
The parts you will need are :-
A small motor - The tray motor from an old CDROM drive is ideal.
A laser pointer - Mine is a 10mW green one.
A small switch - Slide or toggle. Simple on/off single pole will do.
A 9V PP3 battery and battery clip.
A 100 ohm resistor (brown black brown).
A 4" (100mm) piece of 5/8" (16mm) diameter plastic overflow pipe.
A plastic box - Mine is approx 4.5" x 2.5" x 1.25" (110mm x 70mm x 30mm).
A child's powder compact mirror, CD or other mirrored plastic.
A standard laser pointer is a sliding fit down the standard overflow pipe, and as it enters it presses the 'on' button to energize the laser. If you're using a smaller or larger diameter pointer you will have to find a piece of tube of the right size. Check your local hardware shop.
The motor from the CDROM drive is perfect because it is short and fat and has a pulley fitted to give a flat surface at the end. However, any small motor will do as long as it will fit diagonally inside the box.
For the mirror, any small piece of mirrored plastic will do, but some silvered surfaces diffuse the light rather than reflect it. To test, bounce the laser beam off it and onto a piece of card. You should see a well-defined spot and not a series of lines or 'spray' pattern. At a pinch, a manufactured CD will do it but it it should be one with only a small amount of data so you can cut out a bit of unwritten silvered plastic.