LM317T Voltage Regulator with Pass Transistor

Red Laser Module from DX(it seems to be identical with aixiz module) - camparisson with the 5mw laser pointer diode. Asus DRW-2014l1t's 650nm - red diode open can type LM317T/DDL current regulating circuit driver - no capacitor, 3Ω(Ohms) regulating resistance.. 9V from 220V socket.. Max current of the circuit 390-395ma(miliamperes), voltage with max current 3.11V Optical power about 300-350mw(miliwatts) The diode is capable of about 600ma and up to 500mw Lits match instantly--



http://www.youtube.com/watch?v=aIBGqzM56CQ&hl=en