switching an AC transformer

Discussion in 'The Projects Forum' started by wasanne, Apr 18, 2011.

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  1. wasanne

    Thread Starter New Member

    Dec 22, 2008
    my plan is to use a darlington pair to switch the primary of an
    AC transformer. Since a darlington won't switch AC I thought I would use a bridge rectifier between the transformer and darlington pair. the transformer primary output is around 200 volts. Is this a workable theory?
  2. Adjuster

    Late Member

    Dec 26, 2010
    A transformer primary winding has an input. Outputs are obtained from secondary windings. Which are you referring to?

    It may be feasible, if not particularly efficient, to use a DC switch within a bridge rectifier to control AC, but there are safety issues concerned with switching such voltages.

    N.B. the moderators on this forum do not generally allow discussion of circuits powered from the mains without isolation transformers.
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    The purpose of this elaborate idea is a mystery. You idea is not feasible, and is quite dangerous. You would be risking great harm to see that the idea will not work.

    Devices that do such switching exist. Switches, for instance. Solid state relays for another, not to mention electromechanical relays.
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