How to make a cheap and very easy laser diode driver from parts found at any electronics store. This video is about the most simple it gets, you can add extra parts for more features if you want later. For a detailed tutorial on building this driver with extra features, go here: http://laserpointerforums.com/f42/diy-homemade-laser-diode-driver-26339.html
RadioShack Parts list:
LM317: http://www.radioshack.com/product/index.jsp?productId=2062601
resistors vary on what you need, resistor kit: http://www.radioshack.com/product/index.jsp?productId=2062304&CAWELAID=107599311
Parts can be bought off the internet for dirt cheap, for the prices I paid for my components, I paid 40¢.
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