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  1. #1
    500+ This must be a daytime job Boeing 747 Flyer's Avatar
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    Making my own CDU with O/C USBKeys Card

    Hello everyone,

    As per the title, I am enquiring about building my own CDU.

    Basically, I wish to connect 69 Keys via the USBKeys Card to the Level-D 767 for FSX.

    I am a bit unsure about the full procedure for doing this.

    Can I literally, wire the two terminal legs of a push-button switch (one GND and one "button", similar to the BU0836X Card) directly to the USBKeys Card, and from thereon connect to my PC via a USB cable?

    Once connected, will it be recognised in the SIOC box? If so, then is what I need to do next execute an appropriate SIOC script, then run FSX? Is that it? Or have I missed something?

    Please note, I am not bothered at the moment about the MSG and EXEC Lights of the CDU, so no need for outputs.

    Thanks alot, please advise,

    Jack

  2. #2
    150+ Forum Groupie twisted8's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    check out the tutorial over at the lekeecon forum on how to program it

    http://www.mycockpit.org/forums/show...h-USBKeys-card

    And here is a tutorial on how to wire the switches using a matrix method
    http://www.mycockpit.org/forums/tuto...1257369380.pdf

    I built my own CDU following those two great tutorials!

    This is my wiring which is a bit different than the tutorial for the Airbus MCDU since the layout is different. But same concept!

  3. #3
    500+ This must be a daytime job Boeing 747 Flyer's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    Any chance of a circuit diagram anywhere?
    I think I am getting there!

  4. #4
    150+ Forum Groupie twisted8's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    yeah check the last pages of this tutorial
    http://www.mycockpit.org/forums/tuto...1257369380.pdf

  5. #5
    500+ This must be a daytime job Boeing 747 Flyer's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    Okay, those diagrams have helped a little more, thanks for the information.

    Still a tiny bit usnure though. Can I purchase push-buttons with two terminal legs? If yes, then how exactly do I connect these up (please say what I need to connect to each leg).

    Thanks alot,

    Jack

  6. #6
    150+ Forum Groupie twisted8's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    No a problem!
    yeah you can use any push button, the ones i used which are the same that come with the OC kit have 4 legs which makes it easier to wire in a matrix form but it's basicly a switch with 2 legs and each leg is split in two. If you look at the USBkeys manual
    http://www.opencockpits.com/uploads/...sbkeys_eng.pdf
    it gives you a diagram of how the switches connect. Say pins 1-8 are column A and pins 26 to 36 are column B, each combination will give you a different key so you connect one wire from column A(pin 1-8 ) to one leg of the switch and 1 wire from column B(26-36) to the other leg of the switch so A1+B1 (1+26) is one key, A2+ B1(2+26) is another key, A3+B1(3+26) is another, then A1+B2(1+27), A2+B2(2+27) etc

    but you don't physically have to run two wires for each button since that would be messy. if you look at the diagrams and the photo I posted you can see how to wire it using a matrix which is neater.

    hope that helps!

  7. #7
    500+ This must be a daytime job Boeing 747 Flyer's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    Okay so I think I understand now:
    For example:

    "A" Key on the CDU: 2 terminal legs would connect to pins A1 and B1
    "B" Key on the CDU: 2 terminal legs would connect to pins A2 and B2
    And so on...

    Can I do that wiring for ALL the buttons on the CDU?

    Once all is connected, how hard exactly is it to interface using Leksecon and SIOC?

  8. #8
    2000+ Poster - Never Leaves the Sim kiek's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    Quote Originally Posted by Boeing 747 Flyer View Post
    Once all is connected, how hard exactly is it to interface using Leksecon and SIOC?
    Piece of cake. A SIOC script is available, you only may have to adjust the integer codes for each button pressed. lekseecon will do the interfacing to the Level-D for you, digitally, without using key's, and without the need to have the FMC panel window openened.

  9. #9
    500+ This must be a daytime job Boeing 747 Flyer's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    WOW! This seems really easy! Are you sure there's nothing we've missed out? If so, please review the following procedure:

    - Wire up my CDU using the Matrix Wiring (BTW do you have to solder onto the O/C Board?)
    - Fire up SIOC, run the relavent script
    - Run FSX w/ LDS767
    - Done!

    Correct?

  10. #10
    2000+ Poster - Never Leaves the Sim kiek's Avatar
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    Re: Making my own CDU with O/C USBKeys Card

    Quote Originally Posted by Boeing 747 Flyer View Post
    Correct?
    Almost, after you have fired up SIOC, fire up lekseecon....

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