No LED to mains- here's a neon lamp to mains

Discussion in 'General Electronics Chat' started by takao21203, Nov 30, 2014.

  1. takao21203

    Thread Starter AAC Fanatic!

    Apr 28, 2012
    Couldnt resist to build a blink circuit.

    First with a 1uF capacitor, only good for 50v but worked the whole night. 1 M Ohm.

    Then today tried out a 200V LED panelmeter- I had to lower the resistance to 120K, and increase the capacitors to 2x 4uF.

    These are green phosphor coated neons by the way.

    The joule thief I made a while ago by the way can be used as LED tester- only required to hold the LED on one end. Its useful when you want to test a couple of clear LEDs for their color.

    DSC03204-2.jpg DSC03235.jpg DSC03236.jpg DSC03237.jpg


    But it doesnt work with green neon lamps they need a larger voltage.

    -Could try 2x batteries
    -Could try different transistor
    -Could try different turns ration
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    All that exposed wiring doesn´t look very safe.
  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
    Don't worry, he is working on a flammable polyester blanket. Any sparks will cause a fire and hide the evidence of electrocution.
    cmartinez likes this.