All Questions
Tagged with measurement capacitance
45
questions
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Measure capacitance with Arduino and AD7746
I want to measure capacitance with an Arduino and an AD7746 capacitive sensor.
I already used ChatGPT and some examples, but the sensor measures just 0 pF. When I measure with an LCR meter, the ...
0
votes
2
answers
62
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Can I measure pinholes in a dielectric layer using LCR meter?
I have a thin dielectric film (~1 um) and I want to measure the quality of the film in terms of not allowing leakage current through pinholes. Can I use an LCR meter for this purpose? If yes, how? If ...
2
votes
2
answers
245
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Differential capacitance change measurement (sensing) with 74LS628
I'm researching the possibilities to accurately register the capacitance changes of a big metal plate (area 10 m2) to the ground (GND, yes - earth, soil). It varies around 100-200 pF.
For now I'm ...
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1
vote
1
answer
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Need help with validation of the design of a capacitance sensor array for soil moisture measurement
Product Description
The device is a soil moisture sensing and analysis device that uses capacitance sensing technology to help manage soil moisture in your garden. One probe set at the bottom of the ...
- 109
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1
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204
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How does the FDC1004 (capacitance to digital converter) measure capacitance?
I am using the FDC1004 and wondering how it exactly measures capacitance. The datasheet is not explaining much. An associated application note contains a little more information, but still very little ...
- 285
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138
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How does this capacitance measurement op-amp circuit work?
I'm studying this scientific paper where a capacitance measurement is done with the circuit shown at page 3. For simplicity I reported it here:
A sinusoidal signal is applied at the input through a ...
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102
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FDC1004 - Connection (Texas Instruments)
I am trying to figure out how to use an FDC1004 capacitance to digital converter with a capacitor. Actually there are no pin signs on the chip so I cannot understand what to connect where even though ...
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1
answer
162
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What is the signifance of parallel/series inductance/capacitance measurements on RLC meter?
The RLC meter I use includes these measurements: serial inductance, parallel inductance, serial capacitance, and parallel capacitance.
What are their differences, and how are they important ...
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198
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How to make accurate capacitance measurements using LCR meter IET/QuadTech 7600 Plus Precision?
Some students in my department are studying a flat capacitor comb printed on a Volterra PCB. The sample we measured had 19 fingers and a spacing of approximately 216 µm. I need help guiding them how ...
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51
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How to measure Capacitance of Insulation materials, taking into account the frequency and temperature
I have several insulation materials (plates, films and alike). I want to measure the complex permitivitty of these materials (Capacitance and tan delta).
The problem/question is: I did not find any ...
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2
votes
1
answer
349
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How to measure capacitor value using an LC circuit?
How would I measure the value of capacitor using an inductor of unknown value but with a function generator producing a sine wave of 1MHz?
I have an oscilloscope handy.
I lost the labelling on the ...
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1
answer
10k
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How to take Time Measurements using LT Spice
I've been fooling around with LT spice .MEAS feature for a while now and I just can't seem to determine how to take the time measurements I need for an assignment.
I can look at the time values on ...
0
votes
2
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372
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Will I blow up my LCR Meter?
I have a situation where I need to measure a capacitor connected to a live circuit like the image shows. I'm considering a LCR meter because we also have to measure both capacitance and resistance of ...
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2
votes
2
answers
76
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Capacitor measurement in existing circuit
I am searching for the cap load formula of C2 of the following circuit:
In the end I want to be able to determine the capacitance of C2 through the ADC-IN voltage.
The unknown part is a driver which ...
- 334
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Understanding capacitance in oscilloscope probe tip
I am trying to understand the capacitance and resistance in oscilloscope probe tip.
In the above attached image, that 9Mohm resistance is used for that 1x and 10x setting that divides the input ...
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