Questions tagged [touch-panel]
The touch-panel tag has no usage guidance.
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No touch points close to the edge of the screen
Just for fun and to learn, I'm writing code to drive a 800x480 TFT with resistive touch driven by an RA8875 and an ATmega328P and avr-libc.
It works fine so far but when reading touch events, I don't ...
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Driving 1024x600 TFT LCD using SSD1963
I trying to drive a 10-inch (1024 RGBx600) TFT LCD using SSD1963 Controller. According to the datasheet, SSD1963 has 1215 kB embedded SRAM, which can be used for driving 864 x 480 LCD with 24-bit data ...
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How to make a recent laptop touchpad work on PC with an external PS/2 USB adapter
I want to make a laptop touchpad work individually with a USB adapter, but failed, on a recent Thinkpad E14 touchpad part.
Some articles on the internet said they succeeded connecting the touchpad ...
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Why does the air gap between the electrode and the overlay of a capacitive sensor have a negative impact on the touch performance?
I see in the design guidelines that the airgaps between the electrodes and the overlay of the capacitive sensor have detrimental effect on the performance of the touch sensor and they should be filled ...
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Measure capacitance on a mutual capacitive touch sensor
I interpret the mechanism of a mutual capacitive touch sensor like this:
There are 2 electrodes X and Y. To measure the difference in capacity, the X electrode is driven high (i.e 3.3 V) and the Y ...
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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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Need advice on tapping into touch screen connected to LCD
I'm hoping to get some advice on a technical issue I'm currently facing. I am attempting to tap into a touch screen that is connected to an LCD, but I'm feeling a bit confused about how to proceed. ...
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How is this plastic touch component called?
I found this TouchPad inside a toy mimicking a smartphone and I am curious about the technology, which seems to be embedded in a simple transfer plastic sheet like those used for projectors.
What ...
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Voltage triangulation across a copper plate for touch sensing
I'm using an Arduino Uno and am admittedly a bit out of my depth here. I'm trying to sense (very broadly) where on a copper plate a touch occurs. I'm using the voltage triangulation method found here. ...
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How do I find the pinout of this touchpad?
I have this dead Acer Aspire One 756-877B2ss laptop computer from 2012 that I have completely torn down, and I would like to repurpose its trackpad for Arduino or ...
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How can I repair a damaged flat 4 pin cable?
I have a computerized sewing machine Juki HZL-009. This picture is related to its screen, whose touch part has a 4-pin resistive touch screen glass panel.
This image is from a healthy screen without ...
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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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Suggestions on how to desensitize a touch button
The video intercom in my apartment has started ringing on its own at random intervals.
The outdoor panel doesn't have a physical doorbell button: the designer opted for a trendy touch sensor that ...
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How can I use a microcontroller to trigger an existing capacitive-touch pad?
(Note: I have found several other questions on a similar topic, but none of them address my specific issue.)
I have a lamp that is controlled by non-contact touch buttons. The user-facing surface is ...
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What is a subtle way to disrupt or cause interference to a typical laptop touchpad?
I know touchpads operate based on capacitance and using your finger to sort of complete a capacitor and track movements, etc. Is it possible to confuse or disrupt a touchpad using some other material(...
user310264
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I want to trigger buttons on a touch sensitive control panel (not a touchscreen)
I have this cheap hot tub with an electronic controller with touch-sensitive buttons (not resistive since they work with no pressure, only a light touch). The panel is plastic and the buttons are ...
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Correct design of capsense controls
I am trying to design a PCB with some capacitive controls. My first iteration did not seem to work well:
This was a 2-layer 1.6mm board with one circular control, and 5 buttons. The board is 48mm ...
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How to setup a GT911 touch panel using Arduino? (I2C communication)
I have a 9 inch touch panel which has a GT911 controller and works with I2C. I should configure its registers and then read the touched points' coordinates. It has 6 pins (Vcc, GNd, INT, RST, SCA, SDA)...
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Effect of charger on laptop touchpad
A few years ago, on my previous laptop Toshiba R830, I had a problem with my touchpad.
The cursor was lagging and touchpad was not working properly.
I then realized that my touchpad was affected by ...
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Capacitive Touch Pad Design with TTP224 ic
I am designing circular capacitive touch pads of Dia:20mm driving from TTP224 IC on my PCB. There will be 2mm glass panel above Touch pads. My PCB contains other circuits like Arduino, Antenna bands ...
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In the AT42QT1245 touch sensor controller, how do the buttons wire to the device?
Referring to the datasheet wiring diagram, page 4 here: https://www.mouser.com/datasheet/2/268/Atmel-9632-AT42-QT1245_Datasheet-1368898.pdf
It simply says "Matrix X Drive" and "Matrix Y ...
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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 ...
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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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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 ...
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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 ...
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How far does a PCB antenna need to be from a capacitive sensing touch button?
From my basic understanding, capacitive touch works by having a small voltage applied to a touch plane on a PCB, resulting in a uniform electrostatic field. When a conductor (human finger) touches the ...
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How can I make an object with curved surface touch sensitive with Arduino?
Is there a way to make a "ball" (or an object with curved surface) touch sensitive? I want the ball to do something when someone touches it with their hand.
So, currently I got an object out of ...
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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 ...
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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).
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Converting "MPR121 capacitive keyboard" sensor filter data into capacitance values?
The project that I'm working on, the MPR121 capacitive touch sensing keyboard connected with a 8051 microcontroller, my first intention when I started implementing the project was to measure the ...
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Capacitance measurement, mpr121 touch sensing keyboard
I have been assigned a project where I have to use interface an MPR121 capacitive touch sensing controller with a microcontroller. Aside from the touch detection, one of the requests for the project ...
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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 ...
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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 ...
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What touch circuit or sensor to use inside a concrete lamp?
Hi I was planning to build a capacitive touch circuit to control a concrete lamp.
Will the touch work through 8mm thick concrete slab. If yes please suggest best way.
Thanks in advance.
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PIC16F1827 Capacitive Touch Sensor not Incrementing Timer?
So I have a PIC16F1827 on a breadboard and was trying to get a simple demo working where I touch a wire to turn on an LED using the Capacitive Sensing Module. I was primarily going off this example I ...
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Is this a reasonable way to get >50 capacitive touch sensors?
I'm looking to include 50-100 capacitive-touch sensors in a project. I've found these SPI 12-key capacitive touch sensors. Would it be reasonable to use several of these for such a project, or is ...
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How to sense touch on a diffusing sheet?
I want to build a combined diffused light and touch-button around 3x3cm. LEDs could be diffused with e.g. a polycarbonate sheet or diffusing fabric, and touch could be sensed e.g. through 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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How can I build a touchpad/trackpad? [closed]
Every laptop has one - a touchpad/trackpad - for controlling the mouse.
I'd like to build my own, external one. I've looked around and I cannot find a tutorial. I have come across 1 example where a ...
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What material to use for a capacitive sensor?
I'm doing a DIY project that I want to use a capacitive sensor for. I'm having a little plastic box and I want to send a wireless message when someone touches the top of it.
I understand all the ...
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capacitive touch buttons through VERY thick glass or macrolon? [closed]
for a science-project I need to create 4-5 capacitive touch buttons through thick glass or macrolon. I think we talk about 15cm atleast, if not 20. I wonder if a big coil or big sheet of tinfoil would ...
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2D DIY capacitive panel
I'm planning on replacing lights with smart bulbs (e.g. Yeelight RGBW) and replacing light switches with capacitive panels connected to Arduinos which will send data to RPi, which will then control ...
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Microchip MTCH6102 - 2 touch surfaces (3x3) on one chip
building a project that utilizes Microchip's gesture recognition on their MTCH6102 chip - the device has two touch surfaces (circles, diameter 20mm each, 3x3 conductive mesh outline).
The ...
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What is x-plate-ohms on touch?
I am using tsc2007 on linux.
The linux kernel has the following configuration to use tsc2007.
https://www.kernel.org/doc/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt
...
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Atmel Qtouch library help
I'm trying to have 3 touch sensitive buttons on an ATtiny48 device using Qtouch library.
The code was generated using the library wizard inside Atmel studio. I've only added a single condition to act ...
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Large Rectangular Touch Sensor
I'm looking to make a timer for Rubik's Cube solving, which looks like this:
My design just has some added features and a different output type.
However, I'm not sure how best to replicate the hand ...
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The accuracy of Force Sensitive Resistors (FSRs)
I am trying to make a large scale resistive touch sensor with 4 FSRs, one for each corner of the rectangular sensor. The pressure that I'm going to be applying will be a moderately pressured finger ...
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How to design a auto-touch attachment for capacitance screen?
I’m thinking about developing an attachment which is able to “touch” the capacitance touch screen just like the human fingers do, it might be a membrane layer can be sticked to the capacitance touch ...
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Capacitor acting as a resistor
I am trying to make a capacitor out of a CNT ink as a touch pad. I dye two strips of fabric which each have an end resistance of ~0.5-1kohm. I have tried various dielectrics and separation distances....
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Measure diameter of a ball with Arduino
I'm trying to design a hand-held device which would allow to measure the weight and a size of a fruit (orange/apple).
For the weight I can use a load cell, but not sure how to measure the diameter.
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