K243 motor controller

Discussion in 'The Projects Forum' started by Erac, Aug 14, 2010.

  1. Erac

    Thread Starter New Member

    Aug 7, 2010
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    0
    I bought this motor driver ( K243) http://secure.oatleyelectronics.com/files/K243notes.pdf ,but I want to replace the potentiometer that controls the direction of the motor (When the potentiometer is centered the motor does not turn....Rotating it clockwise makes the motor turn one way...anticlockwise..the other..).

    I want the direction of my motor, to be controlled by my arduino micocontroller. Do you have any idea how?


    Hope for your support,
    Erac
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    I remember making this circuit when I tried to PWM a motor.

    The motor does rotate both ways, I am used to PIC's. I think it is possible to use other uC's. I think you have to use DAC ports. Or a digital pot interfaced with the controller
     
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  3. Markd77

    Senior Member

    Sep 7, 2009
    2,803
    594
    If you follow the instructions for using a R/C servo pulse it should work.
    Just send a 1-2 ms pulse every 20ms or so. 1.5ms would be centered, 1ms it would rotate full speed one way, etc.
     
    Erac likes this.
  4. campeck

    Active Member

    Sep 5, 2009
    194
    3
    you could use the arduino to control a digital pot instead of a manual one.
    I did this with a BASIC stamp that controlled a digipot on a 555 that controlled the pulse width going to a motor driver chip for speed control.
     
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  5. Erac

    Thread Starter New Member

    Aug 7, 2010
    8
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    Thanks! markd-77 now I get the concept...some question for clarification:

    Motor Direction Control by arduino microcontroller
    How will i wire the arduino to change the direction as replacement for the potentiometer? It says in guide that the potentiometer is wired to terminals B C and D.. Where/what pins of my arduino should I connect? Where will I connect it to my K243

    Motor speed control

    I will connect the GND of my K243 to the GND of my arduino microcontroller and SIG ( k243) to the digital pin that is being used by my arduino microcontroller.. Is this right?

    My motor speed and direction microcontroller: http://secure.oatleyelectronics.com/files/K243notes.pdf


    Hope for your support
    Erac
     
  6. Erac

    Thread Starter New Member

    Aug 7, 2010
    8
    0
    Hello,

    What digital potentiometer interfaced with a microcontroller do your suggest?


    Thanks,
    Erac
     
  7. Erac

    Thread Starter New Member

    Aug 7, 2010
    8
    0
    Thanks campeck! I think this would be a great alternative
     
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