Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [capsense]

Questions regarding Capacitive Sensing as an input method. This can vary from simple Capsense buttons, to high resolution Capacitive screens, to Capsense programming methods.

Questions regarding Capacitive Sensing as an input method. This can vary from simple Capsense buttons, to high resolution Capacitive screens, to Capsense programming methods.

48 questions
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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 touchscreens, as I'm sure everyone here knows are…
Jeff Ryan
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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 rely on the capacitive characteristics of the…
Tom R
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Capacitive Sensing

Is there a way that I can make an Arduino or other Micro-controller detect a change in capacitance? I'm thinking of having a screen on my door that only turns on when you touch the metal door handle.
littlebirdceo
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How feasible would it be to use capacitive detector through 5 mm thick glass with a gap between PCB and glass?

I'm researching for a project that would need to have some sort of touch detection through a 5 mm thick glass table. Would it be feasible to use a PCB with appropriate patterns and a mTouch/QTouch/capSense microcontroller with it on one side of the…
AndrejaKo
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Triggering a capacitive sensor electronically?

I'm working on a little project I call my "Green Box". Basically, I'm trying to drop my electric usage as low as possible, without losing the convenience of my gadgetry. So far, I'm incorporating a passive IR sensor for motion detection, an ambient…
AC2MO
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How do I get an Arduino (5 V) and MPR121 (3.3 V) to talk?

I have the Sparkfun MPR121 I2C Capacitive touch sensor breakout board I have read that it uses 3.3 V, I know that I can't just connect up the 3.3 V power supply output from the Arduino as the communications lines would require 3.3 V as well. How do…
Ashley Hughes
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Touching Person-to-Person

Is there any way to detect skin touching or no-touching between two people? Maybe using capacitive sensing or any other methods? It doesn't need recognizing gesture, only yes-or-no-touching. The constraints are: Two people in the classroom. (Each…
raymondralibi
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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 conclusion that by simply grounding e.g. A carrot or…
zakgottlieb
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How can I use a generic doorknob as a capacitive touch sensor?

I would like to use a generic doorknob that's installed in a typical wooden exterior door as a capacitive touch sensor. I have found various references for the circuit, but I have some questions about the sensor itself. First, the doorknob in…
Kaelin Colclasure
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How to use the CTMU (Charge Time Measurement Unit) for a capacitive touch sensor on PIC24F?

I'm trying to implement a basic touch sensor using the CTMU on my PIC24F04KA200. Reading the datasheet and application notes provided by Microchip I was expecting this to be an easy endeavor. In this question I will just explain what I'm doing, post…
Josh
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Accidentally made an analogue touch sensor from arduino digital pins

The other day I wrote a simple arduino script to switch on an LED when a pushbutton is pressed. Without connecting the pushbutton, the circuit created a make-shift analogue sensor that varies the LED brightness according to the distance you move…
rom
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Capacitive touch sensors, how do they work?

David mentions capacitive touch buttons in EEVblog #130 - The uCalc Credit Card Scientific Calculator / Computer and indeed I have read about capacitive touch buttons before like in the documentation of de kompasklok which unfortunately is only…
jippie
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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 that some of stylus works by using magnet at its…
duelistknight
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Capsense behind glass

Is it possible to make a capsense sensor that works through a sheet of glass? I have a working capsense sensor on one of these PSoC development boards: The buttons work fine, but when I put a sheet of glass on top, they don't work. Do I need to…
Rocketmagnet
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Sensing touch through a thick surface?

How can I sense the touch of a hand through a thick surface? I'm working on a device that has to be completely enclosed in a 1-2" thick wooden casing (or 1-3mm thick metal) due to design requirements, so no chance of pushbuttons. I thought we could…
Edward
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