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  • Capacitive Touch Sensitivity

    Hi

    Sorry if this is a repeat..

    How can I adjust the sensitivity of the capacitive touch screen. I've seen references to doing it but I can't find any method or procedure for doing it.

    I want to move some older products onto the capitive touch but one of them has a full screen keyboard and the size of the keys makes it a bit borderline with 3mm.


    ULCD 34 DTC.

    Cheers

    Garry

  • #2
    Hi Garry,

    Are you perhaps referring to the attached project file(43DCT touch thickness)?

    Try experimenting and changing these values:

    #constant THRESHOLD 0
    #constant PEAK 30

    The program maybe able to help you in your application. No guarantees though. =)

    Best Regards,

    Attached Files

    Comment


    • #3
      Hi Joseph
      Thanks for the program , very helpful.
      could you send me a part number or link so I can get hold of the datasheet for the touch controller .
      Never hurts to have all the info available before tinkering under the hood.

      Cheers

      Garry

      Comment


      • #4
        Hi Garry,

        You can find the parts used at the display datasheet's schematic section at page 21: ( Resistive / Capacitive Touch)

        http://www.4dsystems.com.au/productp...heet_R_1_3.pdf

        This one might be useful or interesting to you too:
        http://www.4dsystems.com.au/productp...rata_R_1_2.pdf

        Best Regards,

        Comment


        • #5
          Hi

          thie first place I looked was the ulcd 43 datasheet
          I have a datasheet for the AR1021-I/SS but thats for resistive touch. The only other symbols on that section of the datasheet are two connectors and the pullups for the i2c bus.?

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          • #6
            Hi Garry. 'In general' the uLCD-43DCT uses the FocalTech FT5306.

            At some point it will/may have changed to the FT5336, as I believe the FT5306 has been discontinued.

            Regardless, the commands are the same with the newer chip.
            Mark

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