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  • Electromagnet Switch Timer

    abdat60

    abdat60

    @abdat60-rphMSf
    Updated: Oct 26, 2024
    Views: 1.0K
    Hello World,

    Im trying to design a clamp on a hinge that will clamp shut with two (or one) electromagnets attracting for a set interval of time. I would like the option to raise and lower the time interval with a dial (2 to 10 seconds). When the interval of time has passed I want an opposite current to flow over the electromagnets to make them repel from each other for 1 to 2 seconds and a mechanical device will hold the lever in place away from the base.

    I read that a MOSFET can be used to direct the current, any suggestions?

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Replies

  • Ramani Aswath

    Member • Feb 9, 2016

    1. In the open position the magnets are too far away for the magnets (of a reasonable size) to work. It maybe simpler to use a spring on the hinge to do the opening at the end of the set time.
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  • abdat60

    Member • Feb 10, 2016

    I want to manually press them down and just have the magnets hold them in place. the clamp is 15" long.
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  • Ramani Aswath

    Member • Feb 10, 2016

    abdat60
    I want to manually press them down and just have the magnets hold them in place. the clamp is 15" long.
    Then there is no issue. You should still consider a spring release at the end of hold down time. Simplifies the circuit.
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  • abdat60

    Member • Feb 10, 2016

    Ahhhhh, good idea. Simpler is better.
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