Questions tagged [touchscreen]

A display that incorporates a human interface device which records positional information of points of contact between the user and the display

Filter by
Sorted by
Tagged with
-2
votes
2answers
65 views

Capacitive touchscreens dangerous and piezoelectric

Isn't capacitive touchscreen dangerous? I mean we are using our body to be a conductor and even with small voltages a current that could kill us. Also why aren't piezoelectric touchscreens used? In ...
1
vote
0answers
35 views

Cell Phone Purse w/ Touch Screen Easy Access

Hi I want to make Cell Phone Purse w/ Touch Screen Easy Access in mass production . My question, what is the quality of plastic which used window in front of cellphone which is touch screen . Thanks
0
votes
0answers
32 views

Is it possible to connect to a phone LCD screen? (just the screen) [closed]

I replaced a Xiaomi MI A1 screen that had a few cracks but is completely working. It got me thinking: Is it possible to wire it up to a Raspberry Pi / Arduino? Has anybody ever succeeded connecting ...
-1
votes
1answer
29 views

Small touch screen that works under frosted glass or plastic [closed]

I’m trying to build a device with an rpi 3b+ with a touch screen that looks something like the nest thermostat e. Is it possible to have a touchscreen behind frosted glass or can anyone let me know ...
3
votes
1answer
969 views

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 ...
2
votes
1answer
421 views

STM32F0 Capacitive Touch Not Detecting

I am trying to implement a simple capacitive touch sensor using the STM32F0's TSC peripheral. I currently have the following setup. (PA1 and PA2 are switched in the schematic, accidentally) simulate ...
21
votes
5answers
27k views

How can a capacitive touch screen be triggered without human contact?

I want to robotically touch an iPhone screen without any human intervention. I've done some experiments but have not found a reliable solution. It seems even styluses that work through gloves still ...
1
vote
1answer
420 views

Build In Self Test LCD

I've recently been trying to get a custom LCD (ET101005DSAK0) connected to an Embedded System on Module however without any success. When debugging why the LCD is not working I wanted to make use of ...
1
vote
1answer
64 views

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 ...
1
vote
0answers
36 views

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 ...
5
votes
7answers
7k views

Can a water drop do a “fake” touch on a capacitive touchscreen?

If a capacitive touchscreen is hit by water drops, like rain, will it report a touch? I'm trying to evaluate what is the most appropriate touchscreen solution to use in an outdoor kiosk.
2
votes
1answer
157 views

Why does this part of an OLED filter light only when orientated correctly?

Note: The screen is an OLED screen. I had assumed it was LCD, therefore the post mentions it as such. I was disassembling a Samsung phone (GT-I9305) and was able to seperate the LCD into two sections....
-2
votes
1answer
34 views

How can I add a raspberry to a touchscreen car dvd unit? [closed]

I am working on converting a Toyota 2-din touch screen dvd stereo unit into a car computer. I would like to add a raspberry to it and be able to have the raspberry display a browser on the touch ...
0
votes
0answers
28 views

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....
1
vote
0answers
64 views

What are these mobile pixels?

I've got this picture under my microscope for an old Samsung Galaxy Ace mobile phone, I'd like to know what are the different pixels in the rows with a separation in the subpixels? And how are they ...
1
vote
2answers
121 views

Can light damage a monitor/screen

I was reading some posts about how light can damage a camera by heating it up its internal components? Link: Can camera sensors be damaged by light? If I shine a 150-lumen flashlight at a monitor or ...
1
vote
0answers
174 views

Large NFC/RFID reader antenna around a screen

I would like to have an NFC/RFID reader with a screen around 7", where one could tap the card anywhere on the screen to have it detected/read. I do not need to know where the card was placed (...
2
votes
1answer
153 views

Dielectric break down of stacked glass layers

We have a capacitive touch panel with 1 mm thick cover glass. Currently it is failing at 15kV ESD. I am assuming that dielectric breakdown of the glass occurred and the touch driver is exposed to ...
0
votes
0answers
43 views

ungrounded conductive materials for touchscreen interaction

I am in search for materials with enough capacitance to control smartphone displays as good as the human hand. My goal is to build a gripper with the ability to control a Tablet. I would prefer using ...
1
vote
0answers
582 views

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 ...
0
votes
0answers
26 views

Touch sensitive surface above leds

So I'm currently working on a box which should dim my lights based on a touch surface on top of the box. To indicate the light brightness I want to place a ws2812b ledstrip under a layer of white ...
8
votes
3answers
14k views

What is the basic difference between Inductive and capacitive touch screen?

I have seen Smartphones mentioning of two terms frequently; naming Inductive touch and Capacitive touch screen. What is their basic difference and what is the advantage of one over another?
2
votes
2answers
2k views

How to mix to video sources into a split screen (two inputs, one output)

I want to build a circuit for my car (It has two cameras, front and rear) that shows me the front and rear camera in the same screen (splitted), top half the video from the front camera and bottom ...
0
votes
3answers
75 views

Cap touch measurement using digital pin?

I have previously used dedicated touch pins and connected them across an electrode and been able to easily detect touch. Usually in such a case one wire directly from the pad to the dedicated touch ...
3
votes
2answers
776 views

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 ...
0
votes
1answer
77 views

How to run electricity through metal wire to (safely) act as a stylus?

I’m trying to make a robotic arm draw a lowercase ‘i’ on my iPhone’s drawing app without lifting the stylus. The robot arm bit is another story, my current focus is trying to make a stylus out of a ...
0
votes
1answer
128 views

LCD Gasket Causes Touchscreen Issues

Edit: Pretty much all conjectures in my question have been proved to be incorrect. I started fresh with a new approach. New question is here. Original question: I'm having an issue with a ...
0
votes
0answers
52 views

Accuracy issues with capacitive touch screen [duplicate]

Previous question I asked here. Posting a new question because my previous approach included many incorrect assumptions. I'm working on a product with a motor, a fan, and a LCD with capacitive ...
1
vote
0answers
106 views

Interfacing touch sensor with stm32f7

I'm having that touch sensor ST IC ST1633i. It's integrated into an LCD. I'm trying to interface with it, but don't know or understand the actual protocol. Here is the protocol So I'm trying to ...
4
votes
4answers
3k views

How do I make a micro-controller act as a finger on a touch screen?

I want to make a device that I can place on a capacitive touch screen and it will start tapping the screen repeatedly. Is there any way to do this with the Arduino?
4
votes
2answers
468 views

Mutual capacitance sensor behaviour

In a typical mutual capacitance touch sensor when finger approaches sensor it draws electrical field in effect decreasing the capacitance of the sensor (which is described here and here, for example). ...
0
votes
1answer
29 views

How are individual mutual capacitance signal read out from a touch screen?

If I understand this correctly, on a touch screen, you have a a grid based system where the rows and columns are either driving or receiving. When you touch the screen a mutual capacitance arises ...
4
votes
1answer
263 views

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 ...
0
votes
0answers
23 views

Hover Stylus for capacitive touchscreen [duplicate]

Capacitive touchscreens are designed to react to the capacitance of a human body. To my understanding the touchscreen is measuring local distortions of the electric field. Is there a way to influence ...
4
votes
4answers
13k views

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: ...
0
votes
0answers
68 views

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 ...
0
votes
1answer
155 views

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 ...
3
votes
1answer
692 views

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 ...
-3
votes
2answers
184 views

Is it possible to connect a smartphone/tablet OLED screen directly as a PC monitor? [closed]

why? Why OLED? mainly because of best contrast by having no backlight annoying leakage. Why smartphone or tablet screen? because of size, resolution and price. usage requirements, previous tests, ...
1
vote
3answers
154 views

What shape do the electrodes of a touchscreen have?

I know that capacitive touchscreens need two layers of electrodes, but have not found much on the precise shape of those electrodes. Are they just plain straight ribbons, or are there more elaborate ...
4
votes
4answers
449 views

Touch detection on big LED screen

I have a big LED screen covered by plastic surface (removable). I want to change image on that screen when someone touches it. Could you give me advise how to do it or some sensor names for further ...
1
vote
2answers
179 views

Problem I2C reading RA8875 using TM4C123

I have been working with I2C protocol to create some code for the RA8875 (see for I2C from page 67) using a Tiva board (TM4C123, I2C chapter from page 997), and I was able to paint in the display or ...
0
votes
1answer
73 views

Connection For simulation touch using 1ch relay

http://gameautomators.com/book/Electronics/4-simulation.html Hi here is a reference to make a touch simulation with rpi and 1ch relay I can't understand how to connect gpios with relay. There are ...
0
votes
0answers
139 views

How can I make a capacitive touch panel that can sense position?

I'm trying to make a fairly large touch panel (no display). Or if that's any easier: a set of touch ribbons. The Wikipedia page on capacitive sensing and other online resources seem to pretty much ...
1
vote
1answer
51 views

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 ...
0
votes
1answer
43 views

Connector identification (multipin connector for automotive touchscreen)

This connector is from a device connected to the touch screen in the car. This device is chinese, so I'm having trouble locating information about any part number or name. The connector has 4 wires ...
-1
votes
2answers
4k views

HDMI to LVDS converter [closed]

I am a software developer and now working on a touch screen based project of which I have no or little knowledge. Attached is the schematic of the circuit we obtained from chalkboard electronics. It ...
0
votes
3answers
102 views

How to drive a 3” TFT

I want to display 2 or 3 images in a loop (every 5 seconds or so) on a 3 inch TFT. The TFT can be found here, Resolution 240x400 Screen 3 Inch Tft Lcd with MCU Interface It uses an MCU interface, I ...
4
votes
1answer
530 views

How do I control a resistive touchscreen?

The gist of my problem is that I have a resistive touchscreen and a Raspberry Pi, and I need to make one talk to the other using a single ADC of some kind. I have worked with an Arduino and I also ...
0
votes
1answer
574 views

What lvds connector do I have

Can someone help me find out what type of LVDS cable I have and point me in the direction of an adaptor to HDMI. Thanks. Backstory: I recently had to throw out an old Sony Vaio All in one PC and ...