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0 votes
2 answers
75 views

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 ...
Brandon Ramos's user avatar
4 votes
4 answers
352 views

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 ...
Johnston's user avatar
  • 143
0 votes
2 answers
313 views

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 ...
floppy380's user avatar
  • 1,905
0 votes
1 answer
173 views

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 ...
Bizz Keryear's user avatar
1 vote
3 answers
2k views

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 ...
ObsessionWithElectricity's user avatar
2 votes
1 answer
382 views

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-/...
axk's user avatar
  • 825
2 votes
2 answers
2k views

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 ...
M.A.K's user avatar
  • 1,940
1 vote
1 answer
3k views

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 ...
floppy380's user avatar
  • 1,905
1 vote
3 answers
404 views

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 ...
Arik Yavilevich's user avatar
1 vote
3 answers
2k views

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 ...
Mohamed Hassan Allam's user avatar
0 votes
1 answer
769 views

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 ...
Dave's user avatar
  • 123
6 votes
2 answers
14k views

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 ...
Jon Benedicto's user avatar
3 votes
1 answer
1k views

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 ...
ETK's user avatar
  • 65