Questions tagged [electrolytic-capacitor]
An energy-dense polarized capacitor type, used in low-frequency filtering applications.
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Problem with capacitor after bridge rectifier
I wanted to make a simple power supply so I made a bridge rectifier with 4 diodes rated 6 amps, then I connected the bridge to a transformer (220 volts to 9 volts (measured 9.4 with voltmeter) 50 Hz) ...
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Using parallel capacitor-diode pairs to limit current in an AC circuit
I want to limit current from an AC source using capacitors. As I am using dielectric (polar) capacitors, I thought I could use 2 capacitors with opposite polarity in parallel with a diode in front of ...
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Does an electrolytic capacitor have a minimum voltage?
Do electrolytic capacitors have a minimum voltage below which they won't operate? I'm pretty sure they don't, but anything below 7V and 1A will not power the circuit below when the capacitor in added.
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Dimensioning smoothing capacitor for China DIY LED lamp
My first question here so bare with me if I'm a bit "off" or so regarding the level of knowledge etc. My purpose is to try to learn things. So I started off by buying some LED lamp DIY kits ...
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Capacitor in series and parallel to diagnose APC Smart UPS 1000VA
Brother having APC Smart UPS 1000VA and I noticing high pitched buzzing noise coming from UPS: I think it from power filter capacitor - tall one you see on LHS of picture:
(Picture all sourcing from ...
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Assembling and Dis-assembling a Charged Capacitor
If I have an electrolytic capacitor, which is a cylindrical body in which the two plates are rolled-up with a dielectric paper in between them, of very high value (say 1F) and I charge it using a DC ...
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How to identify surface mount electrolytic capacitors?
Various surface mount electrolytic capacitors seem to have no consistent marking method. Here are some examples:
(Image sources: 1, 2, 3)
How can I identify what value and voltage rating these are?
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Formula for calculating capacitor balance resistor values
The following formula is generally used for calculating balance resistor values used for overvoltage protection of capacitors in series when the individual capacitor voltage ratings are below the ...
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Will an electrolytic capacitor work reliably with 0 VDC and 100 mVAC?
I ran across an instrumentation amplifier datasheet from "THAT Corporation", and noticed the polarized capacitor in series with the gain resistor:
It is a typical 3 op-amp in-amp, so the differential ...
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What are the consequences of using a capacitor that is of higher capacitance?
I'm troubleshooting a circuit board that has a dead short somewhere. I removed some capacitors which were shorted in circuit but the problem was elsewhere on the board.
When testing these 1500uf 2.5V ...
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ESR in Electrolytic capacitor vs Voltage rating
I would like to know why in an electrolytic capacitor the ESR decreases as voltage rating increases.
And why the current rating increases as voltage rating increases.
Thank you.
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Surface mounted electrolytic capacitor markings
Is this 22 µF / 16V? General rule of thumb for these markings?
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Two polarized electrolytic capacitors in series VS two bipolars in parallel
I need one bipolar 4.7uF 50v electrolytic capacitor. I have polarized 10uf 50v capacitors and bipolar 2.2uF 50v capacitors. I can place two of the 10uF in series (negative leads joined) or two of ...
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Is .95J worth of work within 1 second Equivalent to .95W of Power?
This is a question that has two parts to it divided up into two sections. It is similar to the "Is Work done to Transfer Energy?" question but has been refined to include the conversion from Joules of ...
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Determine Polaritry of Aluminum Electrolytic Capacitor
I have an NIC aluminum electrylytic capacitor and am trying to figure out which wire is positive and which is negative. Forgive me if this is a stupid question since I'm a total noob at this.
This is ...
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