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- Dec 18, 2009
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Okay guys I have a PHR-803T LD on its way. I have been doing some testing lately with the LM317 circuit. I already turned two red laser diodes into LEDs.:cryyy: I am using the LM317, a 10μF capacitor, 1N5817 diode, and a 22ohm resistor. Now I am using a PC power supply to power the circuit. On the 6 volt rail(red wire)I was getting a current reading of 57mA. The laser diode was lasing and burning at these readings. Now when I hooked the LM317 circuit to 12 volt(yellow wire)the LD instantly turned to an LED. Why is this happening? I thought you can supply the LM317 circuit with 12 volts. I am getting nervous because I do not want to fry my blu-ray diode. I don't understand because I tested the circuit using a 5mm blue LED with 12 volts on the LM317 and it didnt pop the LED. Can someone help me figure out why my diodes are dying?? Oh and I do discharge the capacitor before I hook up the LD.