Dc motor reversing

Discussion in 'General Electronics Chat' started by whiz kid, Oct 13, 2010.

  1. whiz kid

    Thread Starter New Member

    Oct 13, 2010
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    Dc motor reversing

    Hi folks
    this is the best technology forum on the planet.
    Does anyone know how of any hardware/device that can used with a two timers to reverse a twelve volt Dc motor automatically .
    Most electronics hobbyist know that an alternative is using a DPDT toggle switch but this needs to operated manually.
    Does anyone have an idea about how to do this? ​
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Hey Welcome
    U can use a relay and 555 timer to do this
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    If it is a low current motor, under 200 mA loaded, use one 555 for timing & driving a second 555 as invertor. Connect motor, with as much series resistance as possible with given load, between pins 3. Bypass motor with capacitor or diode supressors. Check post by mpcotuong, 9-22-10, chat.
     
  4. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,698
    905
    The electronic equivalent of a DPDT switch is called an H-bridge. H-bridges are used quite often to control DC motors. The direction of motor rotation can be controlled with a microcontroller, transistors, or even micro-switches.

    How big of a motor are you trying to control? Not all DC motors are easily reversible.

    John
     
  5. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    H-Bridge, preferably with a microcontroller or 3 timers, the 3rd being used to wait for the motor to stop so the H-Bridge/motor windings do not burn out from over-current.
     
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