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Touchscreen 4 or 5 wire -- how to determine

Discussion in 'Electronic Design' started by [email protected], Oct 11, 2006.

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  1. Guest

    There are 4 wires coming from my touch screen:

    1 - right of panel (X2)
    2 - left of panel (X1)
    3 - bottom of panel (Y2)
    4 - top of panel (Y1)

    I am not sure if 4 or 5 wires is referring to the numbers of output
    pins (as listed above) or the number of wires internal to the resistive
    touch screen. If you take a look at page 1 of the following link there
    is a four-wire and a five-wire diagram both having a 4 wire output.

    http://focus.ti.com/lit/an/sbaa036/sbaa036.pdf

    If both cases (4-wire and 5-wire) have a 4 wire output how can I
    determine how the touch screen was designed? The datasheet and support
    for the screen is horrible!

    Thanks for the info!

    -Henk
     
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