All Questions
Tagged with electrolytic-capacitor voltage
12
questions
0
votes
1
answer
91
views
Mystery Voltage Across Reverse Biased Diode
I'm observing a mysterious behavior that I cannot explain.
NOTE: Where I use the word "instantly" below I mean this occurs in less than the 1 ms scale I'm using on my digital scope. Also, I'...
- 309
2
votes
3
answers
566
views
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 ...
- 206
5
votes
2
answers
795
views
Voltage drop due to leakage current in capacitors in series
When capacitors are connected in series in a DC circuit, the voltage drop across individual capacitors at and immediately after the initial charging period is inversely proportional to the individual ...
- 206
1
vote
2
answers
945
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What capacitor value should I use for 3.3v from a buck converter IC?
I am relatively new to electronics and trying to design a buck converter circuit using the XL1509-ADJE1. The datasheet specifies that for the adjustable versions (which this is) you should use ...
- 15
0
votes
0
answers
127
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Capacitor Lifetime
Can anyone some sample calculation on how to calculate the lifetime on an Aluminum Electrolytic capacitor who's Endurance value (Assumed as Lifetime value is 2000 hours at 105degC).
The manufacturer ...
user220456
1
vote
1
answer
245
views
Coilgun capacitor reverse voltage in my schematic?
I'm going to build a coilgun and have thought about all possible problems, which I solved except the reverse voltage problem. I designed a schematic based on some other schematics I found online. My ...
- 13
1
vote
3
answers
3k
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Capacitor max safe operating voltage
I'm currently making a power supply with a 32 volt AC out, so the rectified voltage would be 32*1.414-diode drop. The value comes around 44 volts. My question is, is it okay to hook up a 50 V rated ...
2
votes
1
answer
219
views
Using a higher C than necessary in a voltage regulator circuit
I've two questions:
If I've a voltage regulator that says in the datasheet to use electrolytic capacitors is it possible to use 'normal' capacitors with the same capacitance?
I've the circuit drawn ...
- 21
0
votes
3
answers
151
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How is voltage exactly created in a citcuit? [duplicate]
I just began studying electricity and concept of voltage and this particular concept of voltage is so confusing. I have searched answer for this question everywhere and every answers stops short at ...
- 101
0
votes
1
answer
138
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Are capacitor voltage ratings for max charge or exposed source?
If I have a 100V rated capacitor, can I expose it to a 200V source as long as I cut off the source before the the capacitor is fully charged? For example remove the 200V source when the capacitor ...
- 155
2
votes
1
answer
499
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Is it possible to determine capacity and voltage rating of an unknown electrolytic capacitor?
Today I found a big electrolytic capacitor in a scrap yard. It is about 9 cm in diameter and 16 cm high. The only thing that is marked on it is polarity but nothing else. How can I measure its ...
- 135
8
votes
2
answers
12k
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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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