Tagged Questions
4
votes
3answers
113 views
Charge discharge curve of a capacitor, Arduino
I'm trying to visualize the charge discharge curve of a capacitor with Arduino. This is my curcuit:
simulate this circuit – Schematic created using CircuitLab
13 is pin 13 of the Arduino ...
6
votes
1answer
151 views
How do I decide what capacitor to use in a circuit?
I am using a voltage regulator and to get cleaner power, the datasheet recommends using a 0.33uF capacitor. However, it doesn't say what type it wants. Stupidly, I ...
17
votes
2answers
381 views
Should I discard my inventory of old electrolytic capacitors?
I have been doing hobby electronics for more than 10 years, and some of my electrolytic capacitors are easily that age. They seem to work just fine and do not show corrosion or other visible defects, ...
-1
votes
1answer
116 views
Help with figuring out asus motherboard capacitor values [closed]
I have dented capacitor on my mobo which creates short...
I need to replace it but i am having tough time figuring out which one it is.
First Line : FP
2nd Line : 22Dx
3rd Line : 10 1
4th line : ...
3
votes
2answers
284 views
What direction to place electrolytic caps for AC coupling?
If using polarised electrolytic caps in an amplifier circuit as shown below,
Does it matter which way round I place the caps? If so, why?
0
votes
3answers
1k views
Replacing (and perhaps upgrading) bad capacitors within a speaker system?
A few months ago the volume of the left speaker of my pair of low-cost audio monitors began slowly diminishing. Every day it seemed to lose a fraction of it's normal operating volume until the speaker ...
7
votes
2answers
771 views
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) ...
2
votes
3answers
534 views
Diagnosing cause of electrolytic capacitor failing
I am hoping somebody could help me diagnose the cause of failing electrolytic capacitors in a circuit. The context is a charger circuit, more specifically its power supply unit:
Given a diode bridge ...
2
votes
4answers
753 views
How to remove remnants of a capacitor pin?
I want to replace swollen capacitors on a motherboard. Unfortunately, when removing one of them, a fragment of a pin has stuck in the PCB:
I tried to remove it using pliers, but it only made the ...
3
votes
4answers
4k views
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. ...
20
votes
4answers
7k views
Can you make a non-polar electrolytic capacitor out of two regular electrolytic capacitors?
There was some discussion on this question
What are some reasons to connect capacitors in series?
What are some reasons to connect capacitors in series?
which I don't see as being conclusively ...
14
votes
4answers
4k views
Do electrolytic capacitors have a limited shelf life?
Do electrolytic capacitors have a limited shelf life? I would like to know for both aluminium and tantalum.
6
votes
3answers
556 views
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?
