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  1. RichardHole

    Most efficient way to make a strong solenoid.

    Hi Thanks for the replies. Do you know of any simple low cost systems that are already for sale that could do what I need? It would be good if I could just buy the motor and system to release or unwind it when the power is off. Regards Richard.
  2. RichardHole

    Most efficient way to make a strong solenoid.

    Hello How practical would it be to make a solenoid or a number of solenoids parallel to one another that would pull a weight of about 3kg over a distance of 160mm? Leverage could be used if needed. I am wondering roughly how many amps and what length of copper wire would be needed if 12 volts...

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