All Questions
Tagged with capacitive touchscreen
52 questions
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How can I make an effective head-mounted pointing device for a touchscreen
I have read How can a capacitive touch screen be triggered without human contact? and feel a bit closer to understanding the technology, but I am still a bit puzzled.
I recently picked up the task of ...
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Looking for a large capacitive touch array controller
I'm building a capacitive touch panel.
It has an odd shape, so I resulted to building my own with the capacitive diamond array solution.
It doesn't have a screen underneath, so it's all contained on a ...
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What CAD software is used to design and manufacture projected capacitive touchscreens?
I am looking to learn more about how projected capacitive (PCAP) touchscreens are designed and made, specifically with laser ablation. What kind of CAD software is used to create layered drawings for ...
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Do projected capacitive touch panels need side clearance to ground metal?
I need to use a TFT module with an integrated capacitive touch. The TFT has it's FFC and the touch controller has its own, with power supply and an I2C interface. Quite standard, I think, since every ...
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How do self capacitance touch screens work?
I get how mutual capacitance touch screens work, by changing the dielectric around the pairs of electrode and "stealing" electric field lines. Connection to earth of the object (a finger ...
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516
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Using capacitive touch screen without human hand
I'm trying to learn more about how to engage a capacitive touchscreen without using a human finger. Full disclaimer I'm in mechanical engineering (notoriously known to have difficulty comprehending ...
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941
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How do capacitive touchscreens really work?
I have a bit of trouble understanding the electrical laws which apply when I touch a capacitive touchscreen with my finger.
Apparently, there is an electric current running through electrodes below ...
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How to detect which finger touched the mobile screen [closed]
I'm working on a project where I need to detect which finger touched the mobile screen i.e capacitive screen.
I'm not talking about double finger touch or single or drag and move etc. I'm asking which ...
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Bad capacitive touch screen sensitivity when running on battery, without earth
In short:
I´m working on a battery driven handheld device with capacitive-touch screen. The capacitive-touch works perfect when the PCB connected via USB, but it loses sensitivity when driven by ...
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How to detect which pins on a pin display are touched using capacitive sensing
I'm working on a project to apply touch sensitivity to a modified pin display (30x30). The goal is to allow someone to interact with the display through their fingers and ideally touch.
We initially ...
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Test device for capacitive touch screens?
Are there any (more or less) simple test devices for capacitive touch screens,
e.g. something which I can attach to a touch screen and which is able to do capacitive inputs at fixed locations (ideally,...
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Reverse-engineer pinout of capacitive touchscreen
I'm interested in reusing the capacitive touchscreen of my old iPad. (As a learning experience -- I'm aware that this project will cost me more than just buying a new capacitive touchscreen would.)
...
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A hole in middle of a capacitive touch screen
I'm thinking about using a capacitive touch screen (the touch layer only, no display) to detect the position of two moving parts. Each part would have its 'stylus' just above the screen to mark the ...
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Is there definitive documentation regarding the reliability of a capacitive touchscreen?
I'm working with a manufacturer who wants to use a touchscreen (like a mobile phone) to activate the machinery but is afraid the touchscreen could give a false reading.
This would be a touch-and-hold ...
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Is there a material that I could use to generate cap touch presses? [duplicate]
I want to automate some testing that uses captouch as the interface for the human user. I would love to use an Arduino or similar's GPIO to create the equivalent press and release events from a finger....
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How do I trigger capacitive touch screen electronically (without hands)? [duplicate]
I would like to trigger a "touch" or "touches" to a smartphone screen electronically without actually touching the screen with my finger using a remote control somehow.
The idea would be that every ...
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Is it possible to drive a capacitive touch screen work as a touch simulator? [duplicate]
I want to simulate a finger touch/move/etc. on capactive touch screen. Obviously using a robot arm and stylus pen is a solution, but it was expansive and the structure was too complex. It would be ...
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Capacitive touch screens and TPU
I'm sorry, I may be slightly out of topic. I'm just an occasionnal "handyman" and I did not found any helping ressource on the web.
I'm willing to protect a touch screen and none of the usual offers ...
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Simulate capacitive touch
I am using an Arduino Uno and would like to simulate a capacitive tap with zero human contact on my iPhone 5 screen.
What seems to work right now is putting a coin on the screen and connecting the ...
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84
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Real world objects touching reading the same capacitance?
In my project, I am developing a capacitive sensor based system which attempts to identify if two real world objects(*) get in contact with each other. I have done my homework (some) on Capacitive ...
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Raw data acquisition from a capacitive touch screen
I'm trying to integrate an existing PCAP touch screen into an experimental project I'm working on. For it to work the way I want, I need access to the raw data from the touch-screen nodes instead of ...
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Using a straw filled with electrolyte as stylus?
Now what I understand is our human body or a stylus disturbs the electrostatic field of a capacitive screen and thus the mobile calculates the disturbance and does some math and registers a touch.
...
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How do capacitive screens work with rubber head stylus?
Now I kind off know that Capacitive Screens have like capacitors built into them that create an electrostatic field. Now whenever a thing that can carry charge or a conductor touches it distorts the ...
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Figuring out the protocol of an SPI device without a datasheet
I am pondering about interfacing with the iPad Mini 2 touch panel. It seems that no one has successfully done this and/or published anything about it, so I want to take a stab at it.
As far as I ...
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Capacitive touch screen sensitivity question
I have a question about capacitive touch sensing. I have read a few related questions already (here, here and here) and I think I understand the basics.
From my understanding, when a human uses a ...
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Rugged Capacitive Single Touch Screen
I am looking to make a capacitive single touch screen into a small table. Which I can use to put coffee cup etc on. It does not have to be waterproof but rugged enough to not scratch over time easily ...
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551
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Digital control over capacitive touch
I would like to generate computer controlled touches on a capacitive touch screen (e.g. iphone) using the following setup: I have a conductive patch (size of finger) that I place on the touchscreen ...
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339
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Capacitive projectile triggering touch screen
I've read through a number of questions (How can a capacitive touch screen be triggered without human contact?), (How to use a capacitive touch screen without a human hand), (What is the minimal ...
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534
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How does the glass screen of smart phones not block the discharge of capacitors in capacitive touch screens?
Glass is one of the best insulators when designing high voltage electronics, and correct me if I'm wrong, but capacitive touch screens work by measuring the charge of capacitors in a grid on the ...
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199
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capacitive touch film or integerated capacitive touch panel display? using under glass [closed]
We need to put display under 2mm glass. Our device must have capacitive touch input.
which method should we use? Capacitive Touch Films (place it under glass) or LCDs with integrated capacitive touch (...
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capacitive switch behind a mirror (silver backing)
I am new to this field, and I would like to DIY a mirror with a hidden capacitive \inductive touch sensor behind it, once touched it will turn on a 12V LED light.
I have bought a capacitive switch ...
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What material can I lay over a capacitive touch screen that will still make it work?
So I am trying to build a capacitive touch screen in a table, but since the table is much larger then the touchscreen. I like to put something on top that not only make it easier to clean, but also ...
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Making conductive traces for capacitive touchscreens
This is a follow-up to this question I asked years ago.
A short summary:
I'm using a head pointer (see my linked question for a photo) with a tip made of plastic, thus non-conductive. The shaft is ...
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What is the minimal capacitor (capitor type/size/capacity) needed to fool a capacitive touch screen? [duplicate]
Say I want to provide a device (completely batteryless of course, and detached from any human touch) the capability to immitate a touch on a capacitive screen (Galaxy S6 here). I know I just need some ...
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What material can I lay over a capacitive touch screen to block its operation, while still allowing me to see it? [closed]
I own a Kindle Voyage and would like to be able to hold it anywhere, not just along the edges, while reading. So I'm looking for a material that's clear to read through, relatively lightweight, and ...
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Capacitive sensing between two copper plates
Is it possible to detect touch event and its position coordinates between two copper plates spaced apart by approximately 6-7 centimeters? The space between plates have to be transparent.
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Finding the touching angle on a touch-screen?
I am wondering if it is possible to detect from which direction (or at which angle) a human touches a touchscreen.
Imagine something like this:
Is there any technology out there (e.g. special ...
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capacitive touch screen
I am currently trying to build a capacitive touch screen. My end goal is to create a giant track pad/keyboard for my computer. Since abnormally large touch screens are quite pricy I have set out to ...
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Are capacitive display(s) capable of measuring what fraction of a finger is touched?
I'm really curious to get an answer for this question. Since I don't know the functioning of a capacitive display and Google didn't help me on this issue, I landed here. :)
Are capacitive displays ...
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QTouch Matrix ATmega8 issues
After trying a lot on QTouch Matrix for ATmega8,It didn't work for me. So sharing the trouble here.
I have taken reference from this beautiful article. Here he had provided a schematic and PCB ...
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What are possible reasons for this not to work
I connected a 5V relay to an Arduino. It then opened and closed the relay, which had on a terminal (doesn't matter which one?) a wire that went to an iPhone' screen (with tin foil at the tip). On the ...
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Capacitor Touch switch with QTouch
I have been working on QTouch Implementation for ATmega32 Micro controller.
I have taken reference from here. I'm facing issue with grounding Problem.
For debugging process I am displaying the result ...
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Is a capacitive touch screen safe to use?
I was reading about capacitive touch screens. I understood that your hand picks some current flowing on screen. That sounds alarming.
Is it safe to use a capacitive touch screen, since it picks small ...
user59094
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How can I make a fine tipped object emit an electric field similar to that of a human finger?
I've asked this before, but knew less about the tech and didn't word the question properly. I know other people have asked similar questions and knew little, so let me be as specific as possible here:
...
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What exactly does a capacitive touch screen need to register input, and how can that signal be produced?
There are active styli out there, and they take 3A or 4A batteries and don't require any wireless connection. How do those emulate human touch?
EDIT: I am specifically interested in iPad touch ...
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How to use a capacitive touch screen without a human hand
I'm a programmer, and I usually hang out over on stack overflow, but I have a electricity question.
I'm trying to interact with an APP on my phone by indirectly touching the the screen. Modern ...
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Thermoplastic-based touch panels: why not?
(I'm new to EE.SE, so I don't know if this is on-topic here. Please forgive me.)
From what I understand, capacitive touch technology relies on coating one side of a resistive material with a ...
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Capacitive touchscreen [duplicate]
I am doing project in which I want to perform read and write operation by using a capacitive touchscreen. What I know is I can trigger capacitive touch screen by:
By using electromagnet as I heard ...
3
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510
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Smallest touch that can be detected on smartphone touchscreens
Not sure if this is the right place to ask this question, but what is the smallest touch (in terms of height and width) that can be detected on most smartphone screens (capacitive touchscreens found ...
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Conducting plastic for capacitive touchscreens
As I am disabled I have to use a headstick (see picture below) to do stuff on the computer. I also have a phone with a resistive touchscreen, which works well with my headstick.
But here is the ...
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