Questions tagged [electrolytic-capacitor]
An energy-dense polarized capacitor type, used in low-frequency filtering applications.
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What happened to electrolytic capacitors in the 21st century?
We can sometimes see decades-old capacitors (such as ones made in the USSR) still working. They are bigger and heavier, but durable and not desiccating. Modern aluminium capacitors serve for about 11 ...
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What is the "CV" unit for leakage current in a capacitor datasheet?
I've looked at a few leakage current specifications for electrolytic capacitors, and they all seem to specify the value as something like this:
I < 0.01 CV or 3 (μA) after 2 minutes, whichever ...
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Highest energy density electrolytic capacitors
I'm building a project that involves discharging a fairly large capacitor through a pair of electromagnetic coils. It's electrically very similar to a coilgun, though for a different application. I ...
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Reason why polarized electrolyic on audio line doesn't blow up
I've seen the low-end IC audio amp datasheets recommending a simple (polarized) electrolytic on signal input, even for a split supply circuit that doesn't DC-bias the input. For example the datasheet ...
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Recognizing good quality electrolytic capacitors
Too often we get / give the advice to replace all electrolytic capacitors on a PCB when it starts to malfunction (like in DVD player power supply circuit strange behavior. Need help to understand root ...
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Polarity of unmarked smt electrolytic capacitor
I have a kit with three capacitors, described in the parts list as "10uF 25V SMD 1206" and shown on the circuit diagram as polarised (an open rectangle and a filled one). Seen through the transparent ...
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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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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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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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MAX682 with electrolytic capacitors
In a new design I would like to use the MAX682. In the datasheet I found this typical operating circuit:
I would like to use it exactly like that except that I'm going to pull /SKIP to GND.
In table ...
user17592
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MLCC as SMPS filter caps
This question is out of curiosity. I know fairly well that mains SMPS can suffer from bad electrolytic caps. Now I wonder if replacing all electrolytics with MLCCs work? Will it make a more durable ...
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AMS1117 33 sot223: is it ok with ceramic capacitors?
This is the datasheet of voltage regulator that I would use:
http://www.advanced-monolithic.com/pdf/ds1117.pdf
Is it possible to exchange that 22uF with an equivalent (or larger) ceramic instead of ...
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Can two electrolytic capacitors be made into a bipolar? [duplicate]
I know if you put an electrolytic capacitor backwards they explode and it's quite fun to observe them exploding. I am wondering if you can use two of them (and some diodes) to turn it into a bipolar ...
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What is the current when the capacitor terminals are connected?
I need to know the current in a polarized electrolytic capacitor.
What is the practical limit for this current and how do I calculate?
I want to know what is the maximum current I can get when I put ...
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