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Tutorial DIY load cell brake pedal (short tuto)

Discussion in 'DIY peripherals' started by RacingMat, Nov 26, 2014.

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  1. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    i think no: in the HX711 datasheet https://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/hx711_english.pdf
    it is told Operation supply voltage range: 2.6 ~ 5.5V

    INA122 has a much wider range: 2.2V to 36V
    RacingMat, Jan 14, 2016
    #21
  2. NVMax

    NVMax New Member

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    Hey Guys,
    just wondering if you know if the load cells from a Wii Fit balance board will be good for this mod? Not sure what he specs on it are...
    DSC_0001 copy.jpg
    NVMax, Jan 17, 2016
    #22
  3. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    • Informative Informative x 4
    RacingMat, Jan 17, 2016
    #23
  4. NVMax

    NVMax New Member

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    Thanks for the reply RacingMat, Should I be getting a voltage out of without an amplifier?

    Max.
    NVMax, Jan 18, 2016
    #24
  5. NVMax

    NVMax New Member

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    I'm thinking, No...
    NVMax, Jan 18, 2016
    #25
  6. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    No, an amplifier is mandatory to read the small values from the wheatstone bridge...
    • Agree Agree x 2
    RacingMat, Jan 18, 2016
    #26
  7. NVMax

    NVMax New Member

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    [​IMG]

    By any chance do you you know what "E" & "A" stand for which is the input V?

    Thanks for clarifying the need for the amp.

    Cheers,
    Max.
    NVMax, Jan 18, 2016
    #27
  8. NVMax

    NVMax New Member

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    NVMax, Jan 18, 2016
    #28
  9. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    RacingMat, Jan 18, 2016
    #29
  10. NVMax

    NVMax New Member

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    Thanks RacingMat, very helpful!
    NVMax, Jan 18, 2016
    #30
  11. NVMax

    NVMax New Member

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    All Parts are ordered, now the wait...
    Thanks again for all your help, I'll keep you posted.

    Max.
    NVMax, Jan 19, 2016
    #31
  12. NVMax

    NVMax New Member

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    Hi RacingMat,
    will a INA114 do the job?

    Thanks,
    Max.
    NVMax, Jan 23, 2016
    #32
  13. Michal Kudla

    Michal Kudla New Member

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    Hi Guys, I'm new here so first of all, Hello:)

    I have a short question, will this load cell be ok as a replacement of pot in g27 pedals? I can see that you can order it with amplified output (0.5V - 4.5V). Will pedals calibrate with such voltage range?

    Thanks in advance.

    Attached Files:

    Michal Kudla, May 4, 2016
    #33
  14. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    Last edited: May 4, 2016
    RacingMat, May 4, 2016
    #34
  15. Michal Kudla

    Michal Kudla New Member

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    Thank you for such quick response :)

    So the rephrase, In case of Load Cell with amplifier, I do not need to do any wiring/building custom ciruit board, just attach it to wires that were attached to pot, right?

    and regarding consoles?

    ricmotech first revision of load cell was using this device as replacement of pot and you just connected it directly in place of potentiometer (without any amplifier/circuit board) however he stated that it is incompatible with consoles. Why?
    Lately he released v2 which is compatible with ps3 however there is a small circuit board included in this mod (load cell itself looks the same). Can you tell me what is the role of this circuit board?

    Is he using load cell without amplifier now and the circuit board is amplifying the signal (similiar what you have done with diy mod) so it will calibrate properly when plugged in to console?

    Thank you very much.

    PS. Don't get me wrong, if I was living in US I would definitely buy that straight from ricmotech just to support him and what he is doing to community, but I'm concerned that if I will order it it won't get to Poland since it is uncommon that small packages just disappear here before they reach reciever :)
    Michal Kudla, May 4, 2016
    #35
  16. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    RacingMat, May 4, 2016
    #36
  17. Michal Kudla

    Michal Kudla New Member

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    Yes, exactly. It's this one (v2).

    I found a youtube clip (I can not paste links yet, so if you are insterested search for "Logitech G27 Load Cell Brake mod by Ricmotech") in which they review v1 and if you will go to 5:35, they have mentioned there that it's incompatible with ps3 because the axis is reversed.

    Anything that could be done about that?

    Thanks.
    Michal Kudla, May 5, 2016
    #37
  18. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    you could insert some swiches to invert the polarity...
    RacingMat, May 5, 2016
    #38
  19. mmcgeer

    mmcgeer New Member

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    Like this will bookmark as a project
    • Friendly Friendly x 1
    mmcgeer, Nov 13, 2016
    #39
  20. Alexandre Kostik

    Alexandre Kostik Member

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    Hello @RacingMat !! Does INA125 or INA128 also work? I can not find the INA122 in Brazil ....
    Tks!!!
    Sorry, English, google translate
    Alexandre Kostik, Jul 6, 2017
    #40
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