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Raspberry Pi Forum 2.5 inches Capacitive touchscreen for Raspberry
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  • raspberrypi.
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2.5 inches Capacitive touchscreen for Raspberry

alborz.se@gmail.com
alborz.se@gmail.com over 8 years ago

Hi,

 

I am trying to find a 2.5 capacitive touch screen to be used with a raspberry pie.

Does such a display exist? I have looked everywhere.

(even other sizes around ~3 would be feasible)

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  • spannerspencer
    0 spannerspencer over 8 years ago

    There's the 2.4" touchscreen, but it's resistive: 4DPI-24-HAT 4D SYSTEMS, HAT Primary Display, 2.4", Raspberry Pi | Farnell element14

     

    Not sure I've seen a small one, that's capacitive. Those tend toward multi-touch functionality, which I guess most manufacturers don't see as being all that practical on a small screen. Single touch is probably all anyone's really going to do, except in very specific circumstances (which is potentially what you're looking at).

     

    What's the application you have in mind? That might help folk to narrow down your options, or even suggest alternatives. image

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  • spannerspencer
    0 spannerspencer over 8 years ago

    There's the 2.4" touchscreen, but it's resistive: 4DPI-24-HAT 4D SYSTEMS, HAT Primary Display, 2.4", Raspberry Pi | Farnell element14

     

    Not sure I've seen a small one, that's capacitive. Those tend toward multi-touch functionality, which I guess most manufacturers don't see as being all that practical on a small screen. Single touch is probably all anyone's really going to do, except in very specific circumstances (which is potentially what you're looking at).

     

    What's the application you have in mind? That might help folk to narrow down your options, or even suggest alternatives. image

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  • alborz.se@gmail.com
    0 alborz.se@gmail.com over 8 years ago in reply to spannerspencer

    Thanks for the reply. I need to mount this display inside of a very tight device.

    The smaller the screen, the easier the installation will be.

    I need capacitive touch since I plan to use swipe on the screen as a way to change the menu-options. (It it important that is actually swipe and not physical buttons or a button on the screen). Resistive touch seems to either not support swipe or offer a very uncomfortable swipe.

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  • spannerspencer
    0 spannerspencer over 8 years ago in reply to alborz.se@gmail.com

    Ah yeah, tricky that. As you say, a resistive screen might not recognise the swipe all that well.

     

    Maybe (as an alternative, if you can't find the capacitive screen) you could set it up so the screen is effectively divided into three columns, and tapping the left side or right side move between menu options, while tapping the centre is used to select?

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  • clem57
    0 clem57 over 8 years ago in reply to alborz.se@gmail.com

    You may want to look at http://www.ti.com/lit/ug/tiduc04/tiduc04.pdf not so much as a solution but to understand the design problems of capacitive touch. The size of 12 buttons are 75 mm by 50 mm which is very small. Room is needed for 12 LED's. I think a screen would have issues at such a small size.

    Clem

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