i would advice you to wear safety glasses and not fool around while doing this project have fun and be carefull
what we are going to make today is something called as the LM317 constant current driver
so lets make one
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Signing UpStep 1: Materials
1 laser diode (you could hack it out of a dvd drive) x1
2 10uf 16v capacitor or 10uf 63v capacitor x1
3 1n4007 diode x1
4 10 ohm resistors x2
5 100 ohm variable resistor x1
6 lm 317 voltage regulator x1
7 veroboard x1
8 soildering iron
9 solder
10 heat sink
11 switch
all done !!!!!!!!!!!!!!!!!!!!






































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LM317 Laser Driver Schematic and PCB Layout
you can download and edge it to get a tiny driver.
http://www.langeder.org/wordpress/homemade-laser-driver-with-lm317/
Its easier to understand and also includes the two capacitors.
Greetings
Unless you intend to over drive the laser, in which case you need to calculate your component values with care and be prepared to say by by to the laser when it gives up the ghost.