All Questions
Tagged with dielectric capacitor
29
questions
1
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3
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777
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Following is an excerpt from a power electronics textbook. Is the statement true?
As far as I know ESR primarily depends on the type of dielectric.
eg: Al electrolytic (higher capacitance value) would have much higher ESR than ceramic (usually lower capacitance value).
Say for ...
- 3,032
2
votes
2
answers
2k
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Capacitors: voltage-dependent capacitance?
While playing around with a capacitive power supplies, I observed some very weird behavior when passing a 60Hz sinusoidal current through a 1000V disk ceramic capacitor. The voltage curve was very ...
- 1,563
2
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2
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629
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How do I calculate the capacitance of a capacitive touch or water sensor?
Sensors like capacitive touch or moisture sensors are simply two traces drawn on a PCB. For example, you may check the Grove soil moisture sensor. In these types of sensors, the capacitance increases ...
- 2,519
0
votes
1
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223
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Why it can be asserted that the bottom plate takes the highest potential and the top plates takes the lowest of the capacitor?
The ideal parallel capacitor has been filled with 2 dielectrics as shown in the above diagram.
$$ V_{1} :=\text{potential at the top plate} $$
$$ V_{2} :=\text{potential at the bottom plate} $$
$$...
0
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1
answer
39
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Why the euclid distance between the plates of the capacitor has been doubled to find out the capacitance?
I may have been asking of an easy problem.
The problem requires to find out the capacitance.
The ideal capacitor with area of \$S\$ exists and the euclid distance between the plates is \$d\$.
The ...
2
votes
2
answers
699
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How to design an amplifier for a sensing liquid level using capacitive probes?
In this problem I have a capacitor that is submerged in a varying level of dielectric fluid. Therefore, the capacitance varies linearly with the height of the fluid. How should I design a simple op ...
- 23
1
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2
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143
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Calculating the permitivity of PCBs
I've read that the permitivity of FR-4 is around 4.5, however I would like to measure the permitivity of an actual double sided copper clad board, the way I am thinking is to measure the thickness of ...
- 2,780
1
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1
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289
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Can you use 'Rubber,' Specifically Liquid Electrical Tape Between The Plates of a DIY Capacitor
The above is pretty much all there is to the question. By "can you," I mean will it be properly effective / are there any tips? If not, why? It seems that this ought to work, but I can't ...
- 13
1
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1
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200
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What material should I use for the plates of my homemade mica capacitors?
I recently acquired some mica as i want to build my own high voltage (50 kV if possible) capacitors. The problem I am encountering right now is that the surface of such a crystal isn't perfectly flat ...
- 178
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What material can I use as a dielectric in my own high voltage capacitors?
I need capacitors rated for 50 kV. Buying them is an option but the ones with appropriate voltage rating I have seen cost more than 50€ which is far too much.
That's why I want to make caps on my own ...
- 178
2
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1
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755
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C0G vs polypropylene capacitors in signal filtering
Can anybody give me a comprehensive pros and cons list or explanation about the differences between C0G (NP0) ceramic and polypropylene capacitors?
I would like to use them in signal filtering and ...
- 81
0
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0
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387
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Capacitance of circular parallel plate capacitors
I've been trying to solve this question for a while now , but I can't seem to get to the written solution.
Question : Calculate the capacitance of a parallel capacitor having two identical conductor ...
- 123
0
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1
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53
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variation of thickness of dielectric layer for different textile-based capacitive pressure sensors
For my thesis I am working with textile-based capacitive pressure sensors and I am struggling to see how much variation in thickness of the dielectric layer you can have before you have noticeable ...
- 1
1
vote
1
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509
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Capacitor dielectric: Is X7R a direct upgrade over 2C1?
I'm trying to replace a capacitor with an IECQ-CECC 2C1 Dielectric. The supplier has offered a comparable EIA X7R Dielectric. Viewing this comparison document, they are largely identical. However, the ...
- 1,108
1
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1
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91
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How does same capacitor with different dielectric affects the circuit?
I am working on a project and finalizing 0.1uF capacitor with 50VDC(decoupling). I am finding with different dielectrics. My question is how does two diffrenet capacitor having same capacitance and ...
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