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  1. J

    Building my first lpc826 red laser

    Hey everyone, Im making (well, trying to make) my first burning red laser from a lpc 826 diode that I ordered from ebay here. I made a driver using a lm317, a capacitor, diode and some resistors. If I put 2 ohms of resistance in the driver I measure about 360mV over the 1ohm resistor in my...
  2. J

    need help setting the current with lm317

    Im in the process of making my first home-made laser. I ordered the components to make a test circuit and driver online. I connected 3 1 ohm resistors in series to a lm317 and when measuring the mv over the resistor in the test circuit a got about 380 mv, dropping to about 300. I guess adding a...


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