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Discussion in 'General Electronics Discussion' started by Heyineedhelpplease, Nov 11, 2012.

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  1. Heyineedhelpplease


    Nov 11, 2012
    Hi, new to this forum.

    I am working on a motorized device, a simple one
    with 2 AA batteries as the power supply. The
    problem I am having is that the voltage from the
    batteries to the motor is too high, I need a current
    reducer to slow the motor down.

    In addition to needing the electric motor spinning
    at the right speed, I also need it on a timer, that spins the
    motor for a designated time, that is triggered by a button.

    Long story short I need to set up a button that triggers a timed,
    and voltage regulated motor that is battery operated with an on/off switch.

    I'm very new to building electronics, I cant seem to find what I am
    looking for. If you could help me with what parts I would need that
    would help me out a lot.

    Thanks in advance for the help.
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Welcome to the forum.

    A simple way of setting the motor speed would be a series resistor. The higher the resistor value, the slower the motor.

    A simple timer can be built from a 555 timer IC. Here is a tutorial showing how to build a monostable multivibrator (timer) from a 555 plus how to add a transistor driver for controlling a motor, lamp, etc.

  3. donkey


    Feb 26, 2011
    on top of what harald has said I can offer another solution andyou can try itlater but there are motor speed controllers out there.
    haralds suggestion is by far the quickest way but has a side effect of generating heat (at AA battery level and in short timed bursts it shouldn't be a problem though)
  4. Heyineedhelpplease


    Nov 11, 2012
    Thanks for the help.
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