Led driver made of two componets LM317 regulator and one resistor,value of resistor is calculated by formula R=1.25/current you get the resistance of resistor for example in video I use 1.5ohms 2resistor in parralel each one is 3 ohms.
Video of how to make this led driver here:http://youtu.be/xGiuSI5awG4
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