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  1. J

    My Solid State Tesla Coil (Music Modulated)

    CD4046 + CD 4049 IRFP460 MOSFET Half-bridge run on 220V https://www.youtube.com/watch?v=BDIB_z0R5Eg
  2. J

    Who have this 520nm laser?

    This 520nm laser seems cool, from JetLaser. It claim laser have AC plug... They use NDG7475 laser diode with 1.8-2mrad beam spread angle. If anyone have it, share your experience :D https://youtu.be/3XNpba1lxhA
  3. J

    CO2 laser

    I don't know about CO2 laser. Some question I want to ask... 1. CO2 laser company said nerver reverse polarity, but what happen if I reverse it? 2. If I don't use it long or just start a monent, is cooling really necessary?




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