General Computing
usb touchscreen
Updated Wed, 05 Oct 2022 12:20:10 GMT

What is meant to be plugged into the USB connector labelled "Touch" on thjs screen?

This PCB is a small screen, a 5" screen/display .. If I were to turn it over you'd see a display

What is meant to be plugged into the USB connector labelled "Touch" on this screen?

(Excuse the fact that apparently it's on a fleece material, and not a good idea to put a PCB on a fleece).

enter image description here


If you connect this usb to a computer, it would allow touch controls.

Eg: This port is used to comminuciate touch capabilities of the screen. Usuaully this screen is an embedded screen on a device, and this wire is not shown to the user, but it connects internally to the pc so that it has an additional mouse so to speak.

note added by barlop

barlop: "so that connector would go to the computer and cause the device's panel to be both screen and touchpad?"

lpchip "yes , that's basically how it works."

Comments (5)

  • +0 – So is it a connector that sends 5V out (as opposed to expects 5V)? (quite unusual for a USB connector that isn't USB-A). From what I understand USB-A sends 5V. And non-USB-A is meant to expect/receive 5V. — Jul 15, 2022 at 09:08  
  • +0 – And so if somebody plugged a power in there where it is ;abelled touch, would it damage the device? — Jul 15, 2022 at 09:11  
  • +0 – No, its a connector like any normal USB plug that asks for 5V and communicates with the requester. Consider this port the same as the IN port of a usb hub. One port that you use to connect to your computer and give your computer extra capabilities. For that reason, you can also connect power to it, but I doubt that will do much. At least not damage the device. — Jul 15, 2022 at 09:24  
  • +1 – @barlop it likely does not send out (or receive) 5V at all except to sense when something is connected. What it most likely does is appear to a host PC as a USB HID device such as a mouse with absolute screen coordinates akin to a graphics tablet. — Jul 15, 2022 at 09:24  
  • +1 – Yes, that's basically how it works. — Jul 15, 2022 at 10:52  

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