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

learn more… | top users | synonyms

3
votes
1answer
37 views

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 ...
0
votes
1answer
61 views

A small compatible gpu [on hold]

I would like to know what is the best possible way to solve the following problem: I want to have a touch screen over USB this touch screen should be able to receive Graphics from the attached PC, so ...
0
votes
0answers
36 views

Can I repurpose a tablet touchscreen to use as an oversized touchpad for a computer?

This is what is written on the flex ribbon: A11020A1013 UniDisplay UF-1102 I could only find it for sale on the internet, no real usable information. Only ...
0
votes
1answer
31 views

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 ...
0
votes
1answer
42 views

Placing a button on a touch screen?

First off, I know nothing about electrical engineering. So please bare with me. I'm designing a faceplate for a moto360 smart watch that has a small area that overlays the bottom edge of the screen. ...
0
votes
0answers
44 views

How do active stylii work on touchscreen displays? [migrated]

I recently bought an Acer laptop. Then I tried to buy an Acer stylus. The salesperson at the online store told me that one model would work. It turns out he was wrong, and that my laptop has no ...
2
votes
2answers
65 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 ...
1
vote
2answers
39 views

How do I prevent a capacitive touch from registering?

I'm looking for a thin cloth-like material or something that I can treat materials with that will prevent a capacitive touch from occurring. Everything I've tried either is too thick, or still ...
0
votes
0answers
47 views

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 ...
0
votes
0answers
105 views

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 ...
0
votes
2answers
45 views

Phone touchscreen malfunction when connecting audio circuit to it's jack

I use this circuit to convert audio signal to infrared signal and control my DSLR camera. It works fine on my laptop jack, but when I plug it to my smartphone jack, it shows some malfunctions in ...
0
votes
1answer
71 views

How does this USB capacitive touch light circuit work? You can touch anywhere and it turns on, not just the electrode

Here are some pics of the circuit board. Now I'm not asking how the circuit works, I understand that. There is a capacitive touch sensor IC where the shiny electrode you see on top connects to the ...
1
vote
1answer
97 views

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 ...
2
votes
2answers
109 views

Interface with touch screen using arduino

Basically I am trying to stimulate a touch screen with an arduino board. I know this has been asked several times and Ive spent a long time looking at solutions, namely some kind of foil stuck to a ...
0
votes
1answer
86 views

How to activate a touchscreen device without human interaction [duplicate]

I need to be able to activate apps on my iPad without human interaction. We have tried dropping batteries onto the screen but that only works if dropped within a few inches. Is there any material in ...
0
votes
2answers
96 views

Google has no datasheet for ACX502ALM-7 LCD/resistive touchpanel

I have an ACX502ALM-7 series LCD+touchpanel combo. Google cannot find me a datasheet for it. Can any one of you? I'd like to possibly interface it (at least the touch screen part) to an Arduino Uno. ...
2
votes
1answer
98 views

How does a capacitive multi-touch screen capture multiple triggers?

On which principles does a capacitive touch screen work to enable detection of multiple triggers? I understand that there are two layers; a driving layer and a sensing layer (with x or driving and y ...
2
votes
2answers
136 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 ...
1
vote
1answer
522 views

HDMI to MIPI conversion [closed]

I want to use a 1080p touch panel with an ODROID-XU3 Lite but unfortunately it seems that the ODROID only supports HDMI output and that 1080p panels are only really available with a MIPI interface. I ...
0
votes
0answers
170 views

Help identifying a voltage regulator

I'm trying to build a portable screen so that I can watch movies around my apartment if I need to move away from my TV screen (think a WiiU gamepad or a tablet). I have many raw components and I think ...
1
vote
1answer
102 views

A (touch) screen technology to identify several input devices

This may sound vague, since I am not sure if what I am looking for even exists, but please bear with me. I am interested in a technology that would allow me to not only locate, but also identify ...
2
votes
0answers
99 views

What is the current development status of Transparent OLEDs?

As far as I can see there are some working prototypes, but has this technology reached the market in a stable way? Does anybody know what's the current status of the TOLED technology? Also do you ...
0
votes
1answer
56 views

Touch screen type [closed]

I know there are many different types of touch screen out there. In the attached picture, could someone tell me what type of touch screen that is? I am looking to buy some screens like this one for ...
4
votes
3answers
221 views

Nitrile and touch screens. What is the distance required from your finger to the screen to make it work?

I am working for a safety company and we need to certify how we can use some nitrile gloves with touch screen, I read that your finger needs to be at .5mm to the touch screen to make it work. So ...
2
votes
2answers
252 views

How large is “one pixel” for S5 AMOLED display?

Referring to Samsung Galaxy S5 OLED Pixel structure in oled-display.net, in particular this image illustrates the S5 AMOLED pixels: To my understanding, the yellow rectangle should represent "one ...
0
votes
2answers
101 views

Likely to use more power - phone screen or bluetooth le?

Just as a theoretical guesstimate, would a phone screen likely to be more of a battery drain than a bluetooth le connection? Of course this is going to vary on the amount of data being sent the ...
2
votes
3answers
291 views

4 wire resisitive touch screen not working

I am having a problem with making 4 wire resisitive touch screen work. : This is the touchscreen I am using. I also have 100 Ohm resistors in series with all the pins. If I understood correctly: Y+ ...
1
vote
4answers
3k 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: ...
1
vote
2answers
240 views

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 ...
2
votes
1answer
110 views

Is to possible to measure electric signals using a capacitive touchscreen?

Thanks to a very good explanation by Mr. Ghosh, I found that a capacitive touchscreen measures the change in capacity, induced by contact with a conductive material, along a grid. I have two ...
2
votes
2answers
304 views

What connector for this cable?

I am working on a part of a project for a university exam and it includes an interface with a touch screen. The touch screen is a classic resistive four wire, it comes with a display of course. ...
0
votes
1answer
429 views

Control a 3.6V motor (forward/idle/reverse) using two phototransistors facing a smartphone screen

My purpose is to build a cheap quick-and-dirty "robot" using 2 electrical screwdrivers connected to the wheels and a smartphone to control them. I want to control each motor (forward/idle/reverse) ...
0
votes
3answers
100 views

What is the Correct Term for a Touch Screen Type Touch Sensor

This may seem like a silly question, but while we've all heard of touch-screens, I'm looking to build/prototype a device with a touch-surface (no screen) that can register up to four distinct points ...
0
votes
0answers
90 views

What kind of sensor would be best for detecting a tap or touch on either of two 0.2" panes of glass?

I'm building this really cool double paned glass door with contrasting frosting as a feature between the two panes. It's a sliding bathroom door. Being high tech and all, I want to set it up with a ...
2
votes
0answers
139 views

Resistive touchscreen to ADC

I want to hook up a resistive touchscreen to an ADC. I'm new to electronics and experienced in developing software. My intention is to learn, I would much appreciate it if you could nudge me into the ...
0
votes
0answers
77 views

Integrated touchscreen empowered by android cellphone

Not sure if this is the correct stack exchange platform for my question but I'm pretty sure you guys can help me out with my idea. I was thinking about building a wall mounted touchscreen powered by ...
1
vote
1answer
123 views

Manufacturing a device from off-the-shelf components [closed]

I pursue an experimental project that comprises the development of a car GPS navigation unit and software for it. We develop and test the software on a working laptop-based prototype which has a ...
1
vote
1answer
851 views

Connect Marsboard with Touch Panel and access GPIO pins

I am thinking about using a MarsBoard A10 and LCD Touch Panel for low volume commercial product but I have to confirm some capabilities first. Firstly, what would it entail to get the Marsboard A10 ...
2
votes
1answer
34 views

GLCD touchscreen interference with metal frame?

I am trying to use a 128x240 GLCD driven by t6963 and a resistive touchscreen. When touchscreen and the frame are far apart, everything goes well but when I put them together it starts sending touch ...
1
vote
2answers
116 views

Resistive Touchscreen Stands in Midway of the ADC in standby

In a resistive touchscreen I am trying to read x-y position. The schematics is as followed. The code works fine and when I press a point, it reads correct position well but the problem is in standby ( ...
1
vote
1answer
54 views

How to use touch screen shield for GLCD?

I know this is a very elementary question. I was wondering if it is possible to use a touch screen shield on a normal GLCD to change it into a touch-GLCD. I have seen a product which is a transparent ...
1
vote
2answers
357 views

How to detect the location of an object placed on a display

First of all, I'm primarily a software guy, so excuse my ignorance in this area. What I am trying to do is detect the position and uniqueness of an object (say a small wooden cube) that is placed on ...
4
votes
1answer
829 views

iPhone touch screen pulse generator?

I saw this video on Vimeo http://vimeo.com/23507315 and am amazed. Does anyone know how this works? Dies it send a pulse or switch ground? What is the wheel he is turning? What is that big gray thing ...
7
votes
3answers
2k views

Does higher resolution of LCD/LED display mean higher energy consumption for the very same matrix size

If two mobile devices being compared have exactly the same LCD/LED screen (matrix) size and exactly the same battery, will the one with higher resolution have higher battery consumption and thus will ...
1
vote
2answers
727 views

Touch screen and cold, dry fingers

I've noticed that when I pick up my smartphone first thing after waking up, the touch screen is not very accurate in picking up my "clicks" and gestures. I'm speculating that it's got something to do ...
2
votes
1answer
95 views

Touchscreen interference (metal frame)

I have one of these. It's connected to a raspberry pi. It's being mounted against a metal frame, but when it's mounted, i get interference on the touchscreen (the mouse jumps all over the place). How ...
5
votes
1answer
1k views

How can electromagnetic interference from a USB charger cause a capacitive touchscreen to malfunction?

Electromagnetic interference from a USB charger can cause a touchscreen on a mobile device to malfunction, with symptoms such as reduced sensitivity or spurious touches. As an example, see ...
3
votes
1answer
164 views

Making a electrical signal detector (Inputs from multiple source)

I am working on an electrical project that, actually works something like a touchscreen digitizer, where I have to generate multiple inputs from over 50-100 sources, and I need to check from which ...
7
votes
3answers
1k views

Is a human (or other) electrical signal absolutely necessary to activate a capacitive touchscreen?

I know this is the general wisdom, and that someone has asked a similar question here: How can a capacitive touch screen be triggered without human contact? However, I didn't quite understand the ...
0
votes
0answers
243 views

How to detect sliding motions on a resistive touchscreen, at the driver/microcontroller level

Sort of a code question, sort of a hardware question. I'm working on some microcontroller projects involving a standard 4-wire resistive touchscreen. I roughly understand how touchscreen controllers ...