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Thread: How to use Keyboard guts?

  1. #1
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    Question How to use Keyboard guts?

    Ok, here it goes.

    I have ripped aparta an old laptop and the keyboard is small and flat enough to fit in the thing that blocks the sun (damn!, I can't recall how it is spelled!), well that.

    It has two ribbon connectors, one 8 pins the other 12 or something. I know this is a 8x12 matrix of switchs. Now, I have several old normal keyboards, and ripped apart two of them to find that one uses some 16x8 matrix and the other some other combination.

    Inspecting the circuits for the keys, there is no standard as what combination produce what keycode, so...

    Is there some not so hard way of using the circuit of one of the keyboards with the matrix I have from the laptop, or I have to try and test the best combination, and then make a program a device driver for windows to translate the keycodes obtained to the "real ones"?

  2. #2
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    If you want to spend a lot of time soldering and tinkering with the keyboard to make it work, go right ahead!

    An easier solution would be to buy a small keyboard at a local computer store. Places like FRY's sell them and I'm sure you can find several online. It's basically a laptop-sized keyboard in a small case with a normal PS/2 cable coming out of it. Other people have used these and had them custom fitted inside their sunvisor by a car interior shop. Or you could always use velcro or glue it on

    Just some ideas...
    Jason Johnson
    Yorba Linda, California
    http://www.m2pc.com

    MPC Phase IV - *** PENDING ***

  3. #3
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    I was looking towards using a laptop keyboard too...never figured out how to make it work. jjohnson: the main advantage to the laptop keyboard is superflat keys....then you dont have to make the visor ver thick....

    Catlas

  4. #4
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    Originally posted by jjohnson:
    <STRONG>An easier solution would be to buy a small keyboard at a local computer store. Places like FRY's sell them and I'm sure you can find several online</STRONG>
    I live in Mexico. Here there is no commercially available / offered keyboards of that characteristics, damn! and buying through e-bay is hard, not anybody wants to send things outside USA-Canada (so much for NAFTA...). And now that Aaron said that can't get those Dauphin...

    What i would like to know if is there someway to reprogram the chip in the Keyboard, so to rebuild the translation table. And then, if I hook a TSR on the BIOS translation code, Windows will see it, or I need to make a VxD?

  5. #5
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    In case you can't wire the laptop keyboard, what about something like this?
    It's one of those folding keyboards, very light and thin, should be perfect for mounting to a visor.

    Mike.

  6. #6
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    It is too big. (for the car)

  7. #7
    g60
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    I think that folding keyboard is full-size, it's cool tho, you could just stuff it in the glovebox.

    web page
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  8. #8
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    Thumbs up

    The difficult thing to remember with the wiring of a notebook keyboard to a standard keyboard is that the keys are overlaping on the notebook keyboard, it doesn't have the standart ten key off to the right so there in lies the problem!!!!!!!!!!!

  9. #9
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    Well, after ripping apart several keyboards, the mtrix used for each one is different. It wuld be too much luck to fin one that has the same number of pins as the laptop one.

    I once wired an electronic agenda to a keyboard circuit, and made a TSR to translate the resultant keycodes. But only wired enough buttons to make a keypad.

    that was with my original DOS box. Now I'm tryin to put in Win98, so perhaps I'll ask in the software forum if a TSR hokked in DOS to the BIOS routines would be seen or ignored by Windows, cause I don't know how to write a VxD...

  10. #10
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    I saw a review for this a while back
    http://www.halfkeyboard.com/

    it is small but not very pratical, depends on what you will be using it for, all the options of a full sized keyboard, but dont plan on using it fro typing up a document or anything like that

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