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h-bridge 12v 40amps

Discussion in 'SimTools compatible interfaces' started by trust928, Sep 19, 2013.

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  1. trust928

    trust928 Member

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    im gonna try make a small pcb on eagle of this circuit.. i will post the results...
    trust928, Sep 21, 2013
    #21
  2. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    I have tested the circuit before so you shouldn't have any issues mate all good another good point is you can actually feed a separate 5v and gnd to the circuit so it isolated that from the ard, but I didn't find the need when I tested it.
    eaorobbie, Sep 21, 2013
    #22
  3. Historiker

    Historiker Dramamine Adict Gold Contributor

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    I have been told that importing things into Brazil is extremely expensive, I feel for you. The DIY hobby is alive and thriving down there.

    I wish you luck and please do keep us posted.
    Historiker, Sep 21, 2013
    #23
  4. trust928

    trust928 Member

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    nice point thanks,, i have seem some guys selling some h-bridges here they are not expensive but the circuit is like my one.. but the ones these guys sold hold 90v 20amps,, i think i could add this circuit
    trust928, Sep 21, 2013
    #24
  5. trust928

    trust928 Member

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    hey guys one more thing.. i was looking to the diagram and it confuses me....
    what exatly are the controller pins that i must use...?
    the original diagram dont show really clear just some numbers..

    Attached Files:

    trust928, Sep 21, 2013
    #25
  6. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    ok numbering is the same as in pic supplied. This might help you better.
    74HC08_1.jpg

    As you will see you only use 1/2 of the 74hc08 to drive one H bridge and the other can be driven off the other side.
    Hope that helps you.
    eaorobbie, Sep 22, 2013
    #26
  7. trust928

    trust928 Member

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    can u tell me if those are the right pins? i have marked them...

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    trust928, Sep 22, 2013
    #27
  8. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    No - your outputs (green) are wrong

    Motor_IN2 to pin 1
    Motor_IN1 to pin 5
    Motor_PWM to pin 2 and 4

    Outputs to your Hbridge come off Pins 3 and 6.
    eaorobbie, Sep 22, 2013
    #28
  9. trust928

    trust928 Member

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    just to be sure im gonna be using only the left part of the controller
    like this? and ignore all the right side of the controller

    Attached Files:

    trust928, Sep 22, 2013
    #29
  10. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    correct the other side can be used to control the 2nd hbridge a dual circuit can be created.
    I will do a schematic for you. Sorry should have done that first.
    • Like Like x 1
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    eaorobbie, Sep 22, 2013
    #30
  11. trust928

    trust928 Member

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    thanks u help me a lot...... now its clear... if i could use the right side to control a second h-bridge.. i would must need one circuit
    trust928, Sep 22, 2013
    #31
  12. Historiker

    Historiker Dramamine Adict Gold Contributor

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    Hey Rob, great work and thanks for helping out. I think I would like to try to build one of these as well. (or six, lol)
    • Like Like x 1
    Historiker, Sep 22, 2013
    #32
  13. trust928

    trust928 Member

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    this h-bridge is really really easy to build easy components to find.. really cheap.. in the site have the layote to print...
    trust928, Sep 22, 2013
    #33
  14. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    This should help
    2 WIRE INTERFACE.png
    • Like Like x 2
    eaorobbie, Sep 22, 2013
    #34
  15. trust928

    trust928 Member

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    woow thats really good so i can use the 14 pin as 5v+ to power the vcc input is that?
    you have joined all the grounds.. i must just plug into arduinos gnd..(the resistor of the ground is right?)
    the original diagram seemes to be a little different
    the rest is more clear than water cheers
    trust928, Sep 22, 2013
    #35
  16. trust928

    trust928 Member

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    woow thats really good so i can use the 14 pin as 5v+ to power the vcc input is that?
    you have joined all the grounds.. i must just plug into arduinos gnd..(the resistor of the ground is right?)
    the original diagram seemes to be a little different
    the rest is more clear than water cheers
    trust928, Sep 22, 2013
    #36
  17. trust928

    trust928 Member

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    eaorobbie can u make a draw like the one u have made, but showing me how to plug the pots in arduino and the right pins. just it is remaining....thaks
    trust928, Sep 23, 2013
    #37
  18. Historiker

    Historiker Dramamine Adict Gold Contributor

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    Hmmm...perhaps we can get the information all together and put it on the first post? This might be a good, cheap, alternative to the Pololu755?
    Historiker, Sep 23, 2013
    #38
  19. Historiker

    Historiker Dramamine Adict Gold Contributor

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    Trust, the pot position on the Arduino depends on the code (Sketch) that you use with the H-Bridge.

    I am using RacingMat's code which specifies A3, A4, and A5 for the sweeper connection to your potentiometers. The other two wires on the Pot would be + and - and so would be connected to the 5v and ground of the Arduino.
    Historiker, Sep 23, 2013
    #39
  20. trust928

    trust928 Member

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    yeah it can be an alternative. when everything works.. i will join all hte information on the first post..
    tomorrow im gonna buy all that i need, to build it..

    what firmware u guys think is best working on arduino? :nerd
    • Like Like x 1
    trust928, Sep 23, 2013
    #40
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