Microcontroller to drive 2 dc relays

Discussion in 'Embedded Systems and Microcontrollers' started by mikeysela, Aug 4, 2010.

  1. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    Hey guys. I was wondering the best Microcontroller to use if the desired function is to drive 2 dc Relays at about 115V at seperate times. I.e there needs to be some logic in here. The DC motors are brushed and have 4 inputs. Variable speed is desired.

    Thank you.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    There is some confusing information here -
    Can you use DC on the relay coils, and what has this to do with DC motors?
     
  3. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    sorry, I meant to say 2 DC Motors, not relays in the first sentence.
     
  4. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    Are these stepper motors perhaps? (4 Wire Bipolar??) Can You post some pics of the motors?? Post any specs?

    B. Morse
     
  5. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    I don't have a specific motor i would like to drive, i Basically would like to know the most modern and effective way to drive 2 Brushed DC motors with variable speed control.
     
  6. AMIT_GOHEL

    Member

    Jul 13, 2010
    67
    7
    Confgure ur design in such a way that at o/p port of mc you get a speed variation.
    at most binary digit ur moter gets highest speed nd at least lowest speed.
    And the o/p of port will drive relay(obviously via transistor/fet).
     
  7. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    The most "modern" way to do it is to use an H-Bridge capable of handling the motor loads, and or FET's, and use PWM to control the speed of the motor....

    B. Morse
     
  8. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    Thanks very much Amit. Bmorse, you have always been extremely helpful. Thank you
     
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