Build A High Powered

You can get 100ohm potentiometers off ebay for pretty cheap
You can get you switch and battery holders at any radioshack
You can get your laser diodes at for less than half of the price of pulling them from a DVD burner (and a heck of a lot easier)
You can get AixiZ modules from Ebay Seller aixiz_lasers
A few tips
-When you have turned the pot so the brightness turns high, donít even think about turning it more to make it more powerful. If you do that the power will go from 100mW+ to .1mW and your diode will be screwed
-buy more than one diode cause they can break by simply touching them sometimes, too much current to the diode or a ton of other things so you will be safe bbuying more, and if you have extras build more modules and sell them to your friends for even more fun! (go ahead and charge $100 for them so you can be rich)
-Buy goggles for these things! Goggles cost around $40 and are easily worth it, your eyes are worth more than $40 and if you get hit in the eye by this thing without goggles on, youíre screwed.
How to build A High Powered Burning Laser pointer