Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [capacitive]

Based on the usage of capacitors, condensators. Alternatively, utilizing the derivative of signals.

268 questions
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How can human finger pressure be measured?

I am dealing with a situation where a patient can only very lightly press his fingers / hand to signal what he / she wants. Speaking or eye tracking is not possible. The person is also not able to lift his hand. The only movement possible is a…
tmighty
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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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Capacitive Touchscreen for DIY usage?

Anyone know of a good source for capacitive touchscreens in low quantity at a reasonable price? Just something to play around with in projects, I'm interested in either small (eg for portable applications, 3-5") or large (eg for kiosk or standalone…
davr
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How to make 1 bit permanent memory circuit?

I would like to make a simple circuit to store or save 1 bit of data. The circuit should be able to remember the state of an LED ( on or off ) even if the supply is disconnected from the circuit. I need it to work like a hard drive, flash memory or…
Michael George
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What is capacitive loading? (Intuitive understanding)

I have read about capacitive loading, but what does it actually mean intuitively? I just asked this question so as to get an intuitive answer and also know what should I understand when one says that a load is capacitive. Question 1: When we have a…
user220456
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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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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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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 Load is pure capacitive, 10-20 Ohm, 5000 pF Power…
Anindo Ghosh
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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 problem: I cannot operate any devices with capacitive…
Evgeni
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Capacitive AC voltage detection

As I understand it, a non-contact voltage tester works by creating a capacitive connection from a power line to ground, via the detection circuit and the operator's hand/body. This connection passes a tiny amount of current which the detection…
Jon Benedicto
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Does this circuit, used to subtract capacitive response, have a specific name (picture in body)?

What I'm doing: I'm applying voltage pulses to thin films and measuring the resulting current transient, then using these transients to extract the hole mobility. The problem: When the films are very thin, the transient cannot be observed as a…
Toparity
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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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Headphone Noise from Laptop SMPS

I have been facing an issue that has been a mystery to me for quite some time, and I wanted to see if someone here can potentially give me more insights on this so I can understand why it is happening. Please bear with me since electrical…
user235909
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Electric shock from laptop due to capacitive coupling?

If a person touches an exposed wire (the wire has a ground-prong) on the 20V side of a power cable while barefoot, I heard that it is possible to receive a shock of higher than 20V due to capacitive coupling. Could anyone explain how this is…
minusatwelfth
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Causes of ringing in a PCB

Im trying to understand the source of ringing at the termination point of a PCB traces before i delve into actually designing a PCB. For example, by 'termination point', I mean a clock signal terminating at the input of an IC. Some online sources…
user52757
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