Tagged Questions

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

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1
vote
1answer
42 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
75 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
0answers
58 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
82 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
44 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
80 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
135 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
94 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
115 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
1k 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
162 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
85 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
161 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
229 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
83 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
91 views

Using PIC16F707 and Raspberry Pi for Touchscreen display

I've been asked to make a static touch screen for a store display with a very low budget. Due to the cost limits and large number of 'buttons' required, I've considered the PIC16F707 since it has 32 ...
0
votes
0answers
300 views

Signal's Acquisition of XPT2046 : Resistive Touch Screen Controller

I have some question about this controller with my LCD, have tried to search around but I didn't find any answer. Did anybody can explain to me how it work please. I'm working with a STM32 F4 ...
0
votes
0answers
81 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
106 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
59 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
93 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
633 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
29 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
89 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
50 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
243 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
556 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
1k 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
423 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
88 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
858 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
140 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
892 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
189 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 ...
-3
votes
1answer
173 views

Plastic that can be used with touch screens such as smartphones [closed]

I want to make my own smartphone cover which I can use in basically any weather. And this cover should be made out of see-through soft and bendable plastic and the cover itself will actually be a ...
3
votes
0answers
1k views

Arduino - Trigger an iPhone's touch screen with no human interaction

I'm trying to replicate part of this experiment. Specifically, I want to touch the screen with a cable and some aluminum foil whenever I send a signal from an Arduino pin. From the blog post linked ...
12
votes
5answers
7k views

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 ...
3
votes
3answers
659 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?
-1
votes
1answer
271 views

How to address a 16 bit LCD using 8 bit bus?

I need such a TFT with SSD1289 controller, but with 8 bit bus. Does anyone know how to modify it?
4
votes
1answer
209 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 ...
1
vote
1answer
138 views

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 ...
-5
votes
1answer
1k views

List of companies offering ARM evaluation boards for free/reduced prices (5 - 10$)? [closed]

Does anyone know of any free evaluation boards based on ARM Cortex M or A processors? Or at least for really cheap prices? Are there any who offer free electronics start up kit? Free LCD samples, ...
-2
votes
1answer
150 views

free drawing on a touch screen, interacting with physical objects [closed]

I am an hobbyist and having a plan to create my own drawing tablet, and still making ideas, I want to combine physical world with this thing, an idea that I have is that I want line that I draw with ...
1
vote
2answers
1k views

Trying to find a touchscreen that will be compatible with a microcontroller [closed]

I was wondering id anyone knows or have experience with building something that is controlled by a touch screen? I want a 3x3inches touch screen , that will be controlled by an "fairly-easy" to ...
4
votes
1answer
279 views

Capacitive touchscreen

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
votes
2answers
841 views

How does the Microsoft Surface table detect objects?

I saw that the Surface table (now called PixelSense) detect objects. The strange thing is that it's basically an IR screen with LCD on bottom. How does it "scan" them then? Here's a video ...
5
votes
2answers
4k 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?
-1
votes
2answers
2k views

How to make a touch screen device with android OS?

I am planning to make a device which has a touch screen LCD. I have searched for solutions and i think if this device has android OS could be use for many applications. This device will be used for ...
8
votes
1answer
607 views

Mimic human capacitance

In a video at Kickstarter a project called Tapcaps is mimicing human capacitance for triggering touches to a capacitive touch screen (the iPhone). At 0:45 in the video we can see a glimpse of the ...
-1
votes
1answer
365 views

Is it possible to connect a raspeberry pi to a 3.2" TFT LCD touch panel?

I am wondering if i can connect a raspberry Pi to this? How hard would it be?