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  1. B

    Magnetic Pendulum

    I'm trying to make a magnetic pendulum circuit for a holiday decoration, and I need some help. I found this circuit online (see attached JPG), but the circuit behavior is not consistent and it rarely works correctly. Most of the time, the coil is ALWAYS on (rather than momentarily on when the...
  2. M

    60Hz transformer and Lichtenberg figures (fractal burning)

    Background: A friend is looking to do some fractal burning (google it) (edit: also called Lichtenberg figure) and has salvaged a microwave oven transformer (MOT) for this purpose. However he likes to think big and isn't satisfied with the 2kV output so has asked me to look at increasing it. As...

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