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Dc motor problem

e14 Contributor

Hi all just started with programming an Arduino UNO - I have no previous programming background!!

 

I started with Evil Genius book and I want to make a table feed for my milling machine, but right now im just experimenting with dc motor control.

 

What I have set up is a H Bridge (HMD-02)  2 buttons and 2 potentiometers and 1 dc motor

What i want it to do is 1 Nothing until I press 1 button then Turn forward at speed set by pot 1  , stop when i let go of button and turn backward at speed set by pot 2 when I press button 2???

 

MY sketch starts the motor running as soon as I compile and I cant find the problem??????

 

Please any help??

Many thanks.

Attachments:
dc_motor1.ino.zip
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  • 0

    I just bought one of these HMD-02 H-Bridge boards but mine did not come with any documentation.  The ebay seller hasn't gotten back to my request for information.

     

    I have some screw terminals labeled out1, Vcc,GND, out2.

     

    I also have some pins labeled +5,gnd,in1, in2, en.

     

    I need to speed control a single motor, don't need reversing.

     

    Does anyone have a pointer to a datasheet or wiring diagram for it?

     

    Thank you.

  • 0 in reply to e14 Contributor

    I would imagine the motor will go across Out 1 and 2, supply for the motor to the + and - in between these pins

     

    Arduino output pins would go to in1 and in2, 5V and Gnd from Arduino to respective pins on that connector

     

    Educated guess on funtionality:

     

    0 on both in1 and 2, motor stationary, same if 1 (High) is set on those two pins

     

    if in 1 and 2 are different then the motor will turn one way or the other

     

    you should be able to test this without a motor connected by simply putting a meter on the out 1 and gnd or out 2 and gnd, change the input state and you should see the outputs change appropriately

     

    if you want to control only a simple dc motor then you could use this board to run two motors, one between out1 and gnd, one between out2 and gnd, you will loose direction control thats all.

     

    if you use a PWM output from Arduino you should be able to vary the speed of either side. If you have a motor across the outouts (Reversible) then only apply PWM to one side

     

    let me know how it goes

  • 0 in reply to Robert Peter Oakes

    btw, be warned, this is an educated guess, I do not have a circuit or a board to have tried this with

     

    It is how I would connect it if I did have one though, I take no responsibility for any outcome (Except Success image )

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