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Thread: Hacking the front panel buttons

  1. #1
    Constant Bitrate zapwizard's Avatar
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    Aug 2002
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    Austin, TX
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    Hacking the front panel buttons

    It seems like a waste to have all those buttons on the LCD, just to adjust the LCD screen.

    This modification rewires the existing keys on the LCD to work as USB keyboard functions.

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    There are six buttons required to control FrontRow.
    ESC, Enter, Up, Down, Left, Right.

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    So I hacked up a USB keyboard and rewired the needed keys.

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    I opened the keyboard and traced around the contacts I need.

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    I then used a multimeter to trace the keys back to the keyboard connector.

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    I mapped out the needed wires and preped the keyboard controller.

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    I opened up my Lilliput and removed the keypad PCB.
    I then carefully cut the traced on each side of the switch.
    This was actualy pretty extensive, as some traces had to be re-routed for the other parts of the circuit to work.

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    I then soldered wires on to each button.
    Some buttons shared a signal.

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    I then ran the wires out one of the button vents of the LCD.

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    The keyboard control panel was then screwed to the back of the LCD.
    I wanted to do it all internal but there isn't enough room.

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    The completed modificaiton.
    Now I have some quick buttons that I can hit without taking my eyes off the road.
    I can still do any needed adjustments on the LCD via the remote control.

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    I have my touchscreen, wired to my Mac Mini.
    Photos on that here:
    http://www.flickr.com/photos/zapwiza...7594054134962/

  2. #2
    Maximum Bitrate wi77iam's Avatar
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    Wow, nice job by you. Lotta work, tho.
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    *******************************

  3. #3
    Constant Bitrate fooshizn1x's Avatar
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    where did you route the buttons to so that you can hit them without taking your eyes off the road?

  4. #4
    Constant Bitrate zapwizard's Avatar
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    Austin, TX
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    Fooshizn1x, read the thread.

    The LCD is installed into my Dash, I hacked the existing buttons on the LCD to a USB keyboard controller.

    Since they are physical buttons, not software touch-buttons, you can press them the same as your A/C or old radio buttons without taking your eyes off the road.

  5. #5
    Maximum Bitrate
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    not bad. I was thinking of doing something similar so that it would control volume or something... but decided it wasn't worth bothing so I just fiberglassed them over when doing the install.

    good work though.

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