All Questions
Tagged with capacitive ac
13 questions
0
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2
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75
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Adjustable voltage, 1 MHz capacitive biasing
I'm a budding physicist with little electronic design experience and am interested in driving an alternating E-field of adjustable strength within capacitive loads.
Buying a several thousand dollar ...
4
votes
4
answers
352
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Why is this camping light deadly?
I am learning, so go easy on me, if you can.
In a video with BigClive, he takes apart a camping light and says it's deadly when you have mains plugged in and usb plugged in at the same time. In that ...
0
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2
answers
313
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High pass filter is not resulting as good as the scope's AC coupling
I'm generating sine waves by using a micro-controller and DDS module. The output sine normally swings always positive between 0 to around 1V. But I want to generate a real alternating sine with ...
0
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1
answer
173
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powersupply ac to ac
I have recently bought a dcp917S and hoped I finally found a wireless chime that I can tie into my apartment buildings bell system. Since I live for rent there I can't do any changes that are not ...
1
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3
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2k
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Shock from Capacitive Coupling
In an AC supply which is not earth grounded, I see a small amount of current flowing to ground from both wires of the supply (live wire has higher) even though the circuit is incomplete.
It is due ...
2
votes
1
answer
382
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AC mains wire finder + live wire equivalent circuit [duplicate]
I'm talking about devices for tracing hidden AC mains wires in walls like this one: https://www.ebay.com/itm/3-in-1-LCD-Wall-Detector-Stud-Center-Finder-AC-Live-Wire-Metal-Detector-Scanner-/...
2
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2
answers
2k
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Why power factor correction for Capacitive load is more difficult?
When we want to correction power factor of a motor(inductive load) its simply can done by adding an capacitor in parallel with the motor but its not possible to correction power factor of an ...
1
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1
answer
3k
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Eliminating ghost voltage and breaking ground loops in a system
The above illustration is a setup I use where amplifier outputs go to a data acquisition system through BNC cables. The data acquisition system is earth-grounded. Mains system voltage Line to Neutral ...
1
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3
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404
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Is electric field of capacitive sensing circuit harmful and is it radiation?
I have constructed a circuit for capacitive sensing. The code charges and discharges a conductive plate. This uses an Arduino which is connected to a computer via USB.
I have decided to measure the ...
1
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3
answers
2k
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Grid is capacitive in the evening
what does this term mean? "the grid in the evening is capacitive"?
I work at a company and we are working on integrating a battery storage system on a utility scale for peak shaving of solar. When we ...
0
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1
answer
769
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Capacitive Moisture Sensor - Is AC or DC better/more accurate?
I am looking into making a capacitive moisture sensor. This has been discussed many times already, but I am not sure what is the better option, AC or DC.
I want to run this off of a battery, so DC ...
6
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2
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14k
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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 ...
3
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1
answer
1k
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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 ...