Questions tagged [electrolytic-capacitor]
An energy-dense polarized capacitor type, used in low-frequency filtering applications.
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Should ventless electrolytic capacitors be mounted upside down?
I read in this CDE application guide and this Nichicon application guide that if a screw terminal electrolytic capacitor is installed upside-down, the vent may not function properly and the ...
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diodes blow with no load on full wave bridge rectifier
I have built what I thought is a simple first stage for a power supply consisting of only the full wave bridge rectifier (made up of individual 3A SMD diodes) and bulk capacitance.
The moment I apply ...
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How to avoid a electrolytic capacitor on a (audio) signal path?
I've built a compressor basing on the all-in-one chip THAT4301. It works well. But I'm still not happy because of the electrolytic capacitor I used in the signal path. My design was based on the ...
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Why should care be taken while closing a capacitive circuit?
The other day in class, our professor told us that care should be taken while closing a capacitive circuit and while opening an inductive circuit.
Why is this so?
I partly understand the inductive ...
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Why does an ideal capacitor give rise to a rectangular cyclic voltammogram (CV)?
Many scientists are interested in developing supercapacitors, which have electrolyte rather than solid dielectric between the charged plates. In the field of electrochemistry, cyclic voltammetry (CV) ...
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How to estimate electrolytic capacitance from foil area
I opened a failed 1000 μF electrolytic capacitor. It contains 2 foils coiled with paper and some wet dielectric.
With reasonable assumptions (to me), I can not derive marked capitance from this ...
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Why do these capacitors have an additional plastic block around them? What kind of capacitor is this?
Just saw these type of capacitors for the first time and I'm curious :
Why do they have this additional block of plastic around them? Some kind of shielding?
Is there some specific reason they didn't ...
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Aluminum Electrolytic Capacitor Dissipation Factor
I am using a big aluminum electrolytic capacitor (400V/470uF/105°C) after a 220VAC bridge rectifier in a motor application.
During the burn-in test (180VDC, 6A seen by the motor) with a constant ...
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Is a minimum of 1000µF capacitance needed between an lm386's output and a speaker and if so why?
In this video explaining how to make an audio amplifier, the narrator warns
Don’t be misled by crappy schematics…with low values like 100 µF. You want to use at least 1000 µF [between the LM386's ...
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What are markings on top of electrolytic capacitors?
I often see a marking like the following pattern on the top of radial PTH elcos.
What does it mean? Is it an identification of the manufacturer?
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Does the physical size of electrolytic capacitors affect how they perform?
I have two 100uF electrolytic capacitors. Same voltage rating and same temperature rating, yet one is 8 times larger than the other one, being 2x longer and having 2x the diameter.
If I want to use ...
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Footprints for SMD electrolytic capacitors
Does Altium Designer Summer 09 has footprints for SMD electrolytic capacitors? If so, where can I find them?
I've noticed the dimensions of these type of capacitors are given in diameter x height. ...
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Why do some electrolytic capacitors increase in capacitance with age?
All in the title really; I've been repairing music equipment for years and replace electrolytic capacitors quite often. Many times I've measured the capacitance of an old cap and it will read double ...
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How to identifiy this "2222 063 90025" vintage capacitor?
I am restoring an old stereo valve amp and would like to test (and replace if needed) some components. I don't know the history of the amp, but it's made in New Zealand and looks to be from the 1960'...
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Why are some capacitors bent on old boards?
I've noticed that on older boards some of the electrolytic capacitors don't sit up straight, they're not totally vertical. I wonder why this happens, is it because they were soldered by hand and the ...
