Questions tagged [electrolytic-capacitor]
An energy-dense polarized capacitor type, used in low-frequency filtering applications.
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Power schematic questions
I received a guitar pedal in poor condition and looking to repair. Checking through the schematic, it appeared the electrolytic caps were installed backwards. All other picture I could find online ...
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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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Surface mounted electrolytic capacitor markings
Is this 22 µF / 16V? General rule of thumb for these markings?
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Precise capacitor in parallel to power supply
I found this schematic in ADNS-2610 datasheet.
There are two capacitors in parallel between pins 6 and 7 (GND and VDD.) One is 4.7 uF and the another is 0.1 uF, so the parallel result is 4.8 uF.
Why ...
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Probability of explosion of a 100 µF, 25V capacitor when powered at 5V [closed]
I have a system which uses this board: Arceli Motor Control Speed. It's supposed to run for a maximum of 5 hours continuously.
It has an electrolytic capacitor (black vertical tube) on which is ...
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Why do some SMD electrolytic capacitors have platforms?
I’m working on a computer monitor’s power board (to replace a capacitor or two, which I assume is the problem), and found these:
Replacements are easy to find, so no issues there, but I’m curious why ...
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Can you replace ceramic or tantalum capacitors with aluminum electrolytic capacitors?
I have a question about the hookup for my 12VDC to 5VDC step down module - the K7805JT-500R3.
It states in the datasheet that ceramic capacitors are what can be used but it also states that tantalum ...
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EMI filter attenuation requirement for a buck converter given EMI compliant AC-DC converter
In my application I have an off the shelf 600W 72V AC-DC converter that generates the main DC bus that powers a custom board that houses a 72V input, 9A output buck converter switching at 330kHz. A ...
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Electrolytics and PCB Routing
In researching whether or not it's common practice to run traces/place vias underneath electrolytic capacitors (specifically SMD electrolytics, didn't seem like it would be an issue to me), I came ...
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Calculate capacitor charging constant time connected to battery and boost converter
I know the formula to calculate the constant time for capacitor is t=RC and for full charge t=5RC.
In the following example there is not resistor in the circuit but of course we are not in the ideal ...
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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'...
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Can you replace electrolytic capacitors with tantalum ones?
Due to size constraints on a custom PCB, I have opted out for using the smallest type of electrolytic capacitors (3 mm diameter.) However, capacitors in such a small diameter are almost impossible to ...
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What is the capacitor needed for 30 kHz power rectifier?
I need to rectify 200 V at 30 kHz for a resistive load of 3-4 kW. I use a 1200 V/60 A Schottky diode bridge. I have some 6800 uF/450 V capacitors. Can I use them, or should I use other values? Is ...
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How can I measure the voltage of a capacitor using multimeter?
I'm new to electronic and trying to measure a capacitor (Aluminum Electrolytic one) using a multimeter. The cap is already charged. What I did is to touch the positive leg of the cap with the red ...
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Green vs black capacitor (aluminum)
I seem to have defective capacitors on a board and I am looking at buying new one to change them.
The actual capacitors are green. I noticed that the green ones are more expensive than the black ones ...
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