Questions tagged [capacitive]
Based on the usage of capacitors, condensators. Alternatively, utilizing the derivative of signals.
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Capacitive where is the touch?
I am a newbie in the world of circuits and electronics. But we all started somewhere.
I have this idea about a street sign that should be used as an instrument. All most like a Theremin. Touching it ...
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Choice of sensor for detecting touch (on/off)
I would like to detect a user's touch on a shop window (at a specific area, there would be a 'call to action' marking on the window, i.e. 'touch here')
Any sensor to detect this must be contained ...
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How can I make a POWER-LED Lamp?
What is the best way to light 10 POWER-LEDs with AC mains (220V)?
(I want to make an LED lamp.)
Here is more info:
I have 10 of these POWER-LEDs:
Product Chip: 40x40 mil
Chip Brand: EVERLIGHT-...
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Can I use a capacitive sensor to detect a person proximity without touch?
I only see uses of capacitive sensor to detect touch. But I wonder if I can calibrate a capacitive sensor to detect if a person is close enough, even if the person is not touching it.
I intend to use ...
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Capacitive load at the output for analysis of CMOS cells
This question is very rudimentary one. Please point me to the link if this question has been already asked.
In general, when working with simulations and and analyzing the standard cells designed ...
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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 ...
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Capacitive touchscreen [duplicate]
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 ...
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Making a grounded object capacitive
I am trying to make a copper pipe which is placed in a natural park capacitive. It is placed in the soil meaning that it is already grounded. I am using a basic arduino and their capacitive sensing ...
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Looking for a transparent conductive spray/paint/ink
I know there are conductive sprays available, but these are strongly coloured due to the metals inside them. I am trying to make a (dry) wooden surface capacitive, but would like to have the feel and ...
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Split-phase 230VAC transformerless capacitive power supply for 5V@30mA regulated output -- series cap?
I'm a hobbyist developing a hybrid power switch (electromagnetic + solid state) for a resistive electric stove (8kW max) top. I have a profoundly autistic, disabled adult in the house and I need a ...
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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 ...
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Grounding Plexiglass
I have a sheet of plexiglass that has metal strips (Aluminum) that will be connected through wires to an Arduino. The Arduino is grounded but the metal strips are not. The metal strips will rest on ...
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Replacement IC for the touch-button QT1081?
A project I'm working on needs several touch buttons. I found the datasheet for the Atmel QT1081, which supports up to 8 capacitive buttons, with the added advantage for our circuit that there are ...
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ESD protection of capacitive touch doorknob circuit?
This is a follow-up to my question: How can I use a generic doorknob as a capacitive touch sensor?
I am now ready to move beyond the proof-of-concept stage, but I have not yet learned of a ...
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Simplest touch sensor for a copper surface
I'm looking for the simplest way to implement a binary on|off touch switch using a single pole. The touch surface is copper. The position or pressure of the touch is not needed, just simply:
On = ...
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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.
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Conducting plastic for capacitive touchscreens
As I am disabled I have to use a headstick (see picture below) to do stuff on the computer. I also have a phone with a resistive touchscreen, which works well with my headstick.
But here is the ...
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Capacitive sensor circuit
I'm designing a capacitive proximity sensor for detection of human presence. My requirement is that I should be able to detect presence by monitoring change in capacitance at the highest possible ...
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Driving LM3886 at 100 KHZ in Bridge Tied Load (BTL) configuration?
Would someone have experience with driving a pair of LM3886 Overture Power Amplifiers in BTL with up to 100 KHz sine wave?
My parameters:
Frequency band of interest: 20KHz to 100 KHz, sine wave
...
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Glitchy Touchscreen Caused by Charger [closed]
I recently bought a Nexus 4. I had a couple of spare chargers laying around. I used a charger that apparently had an issue exactly like: https://www.youtube.com/watch?v=mrpBTG0a6K8. If I used my own ...
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What are those black things on the board?
I'm a beginner in electronics, and I'm ignorant of many basic things.
Check out these black things on the board:
These are from a keyboard.
I'm disassembling it and I want to connect my own ...
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Water level: BIG capacitive level sensor with steel bars?
So I want to measure water level under a bridge, or inside the city drain.
Would it be possible to run two long (4 meter) metal probes, each one enclosed inside a PVC pipe, and placed one next to the ...
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Smallest touch that can be detected on smartphone touchscreens
Not sure if this is the right place to ask this question, but what is the smallest touch (in terms of height and width) that can be detected on most smartphone screens (capacitive touchscreens found ...
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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 ...
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How to drive and control capacitive load?
There is electrochromic film (which is some kind of capacitive load) that need to be driven with 50Hz alternating current, load voltage should be controlled in range 0-100V (with 8 or more fixed ...
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Formulas for Integral Components
Formulas for Integral Components:
I am looking for "simple" approximative formulas for integral components. In particular for:
A grounded interdigital capacitor (i.e. above a ground plane and with ...
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Is FR4 waterproof? What about soldermask?
I'm investigating ways of making a capacitive sensor that will operate in very moist environments, potentially even submerged. What I need is a way to make some conductive plates in a specific ...
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PCB Matrix Touchpad?
Is it possible to DIY your own capacitative touchpad on a PCB? The last page of this mentions it:
http://www.ebv.com/fileadmin/products/Products/Fujitsu/FMA1127/...
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