Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [touch-panel]

70 questions
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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. What I'm thinking at the moment is a cone shape.…
Leonti
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Cutting Touchscreen

For a small hobby project I would like to use a resistive touch overlay. However, sourcing the correct size seems near impossible. Can I cut a resistive (4-wire) touch screen to fit?
Arne
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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). Now, I came across this sensor design and tried…
mewa
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Salvaged touch pad from old laptop projects

I salvaged this touchpad from an old laptop and I would like some ideas for using it, I thought about using it as a light dimmer for two sets of lights. Does anyone know how it works? I'm sort of a newbie but I'm willing to learn. Where can I find…
workoverflow
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Source for small Touch-Panels?

Is there a company that will sell me a touch panel similar to the IPhone or IPad surface, in single quantities, complete with a Developer Kit? Can I get it in a specific form-factor (say, 2x7 inches)?
Robert Harvey
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How can I build a touchpad/trackpad?

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 webcam is used, but this is an optical touchpad,…
pookie
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How could I make a water-resistant touch/tap sensor (similar to push button) for all-weather outdoor use?

I am building an Arduino-based device to be used outdoors (on a bicycle), and it is expected to work in all weather conditions. The device will have some buttons to turn lights on and off, honk the horn, etc. Since regular push-buttons would not be…
heltonbiker
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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 lasted all of six years before these intermittent…
Vorbis
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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 http://www.youtube.com/watch?v=I0QBivma6j8
blez
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touch tactile button

I am not a native English speaker so I need a little help to find the right name of the component that I am looking for. I have a device that has a touch panel with 3 touch buttons. They are capacitive touch buttons (cannot be pressed). Below the…
darpet
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Explanation of touchpoint density in touchscreens

I'm looking at touchscreen supplier specs such as this one. What does the specification "touchpoint density" expressed as touches/sq.cm sq.in or mean? The value given is "> 100,000 touches/in^2". Does this mean it can differentiate between pinpoint…
Jay
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Convert capacitive touch sensing back to mechanical switches?

Capacitive sensing seems to replace often mechanical switches. Is there a way to convert them back to mechanical switches? Problem at hand is a cooking device with interfaces with the user via the dreaded capacitive touch buttons. If I had…
humanityANDpeace
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Touchable plastic surface

I recently bought a nice RGB Led Controller with a very nice design and i want to know what technology is used for recognising the touches on this thick plastic layer. It works absolutely reliable and is very sensitive. I wanted to integrate exactly…
perotom
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How do I detect human touch on a point on the PCB?

I want to print buttons in the silk screen of one side of the PCB. And, I want to detect if a human finger touches any of these areas. What kind of sensor should I use? Can I do this without using a sensor product? For example, by placing traces…
hkBattousai
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Touch activated switch

I am trying to create a circuit that will be able to detect a touch (with fingertip) on a metal/aluminium surface that it is connected to. Currently I have this circuit (I am sorry for bad drawing...): My assumptions are probably wrong, but this is…
Golaž
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