Are capacitors a viable option for storing charge in electronic circuits?

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Discussion Overview

The discussion revolves around the viability of capacitors as a means of storing charge in electronic circuits, particularly in comparison to rechargeable batteries. Participants explore the applications, limitations, and characteristics of capacitors in various contexts, including energy storage for motors and other electronic devices.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant shares their experience with a capacitor and questions its effectiveness for storing charge, particularly for applications like solar energy storage.
  • Another participant explains that capacitors are typically used for short-term energy storage and can smooth out voltage fluctuations in circuits.
  • A participant mentions that capacitors can release high amounts of energy quickly, as seen in camera flash circuits, suggesting they are suited for short bursts of energy.
  • Some participants argue that capacitors and batteries can complement each other in energy storage systems, with capacitors reducing wear on batteries by handling short bursts of energy.
  • There is a discussion about the differences between how batteries and capacitors store energy, with one participant emphasizing that capacitors store energy electrostatically while batteries store energy chemically.
  • Another participant lists various applications of capacitors beyond energy storage, including filtering, coupling AC signals, and forming networks in electronics.
  • Some participants express uncertainty about the efficiency and practicality of using capacitors for long-term energy storage compared to batteries.
  • Questions arise about the feasibility of using generators for energy storage and the implications of energy capacity measurements.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness of capacitors versus batteries for energy storage, with no consensus reached on which is superior for specific applications. The discussion includes both supportive and critical perspectives on the role of capacitors in electronic circuits.

Contextual Notes

Participants mention various factors influencing the choice between capacitors and batteries, including physical size, voltage, cost, and energy capacity, but do not resolve how these factors weigh against each other in practical scenarios.

Who May Find This Useful

This discussion may be useful for individuals interested in electronics, energy storage solutions, and the comparative analysis of capacitors and batteries in practical applications.

  • #61
Ratch,

Give us one example of where the term "charging" would be appropriate usage.
 
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  • #62
sophiecentaur,

You and the others who use your terminoligy are in a minority ...

I would rather be in the correct minority than the wrong majority.

jim hardy,

Try Asimov, On Physics and View from a Height. And Don Quixote.

Fiction writers? By the way, what does "common sense" have to do with this argument? I am either right or wrong. Some of you said I was right even though I should use wrong nomenclature.

the_emi_guy,

Give us one example of where the term "charging" would be appropriate usage.

Ratch

I can't think of any for capacitors, and I have not seen any in the arguments against my position.
 
  • #63
You can't think of *any* circumstance where you could correctly use the term "charging". We should remove it from our technical vocabulary entirely?
 
  • #64
Ratch
You are losing your Capacity to see reason. That's a chargeable offence, I think. It goes against current thinking and is Potentially troublesome. Why resist? You will feel more at Ohm with things if you conduct yourself better. Your powers of Induction should bring you to a terminal conclusion. :biggrin: Or is it a case of Do or Die - electric?
 
  • #65
deleted, on second thought...

Merry Christmas to all !
 
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  • #66
:smile::smile: And to you Jim and all the others :smile::smile:
 
  • #67
Well, I think this thread has run its course...
 
  • #68
sophiecentaur,

I admit I am biased toward TRUE meaning of words, and not the FALSE impression caused by the time decay of proper usage. The timely constant reminder I give when I talk about misnomers shows my incapacity to conduct myself as though they were never spoken. My inability to go with the current flow is intrinsic within me. For that I apologize.

Ratch
 
  • #69
There's no reason to be rude.
 
  • #70
This is what happens when you get your "knowledge" from answers dot com...

http://wiki.answers.com/Q/How_do_capacitors_store_a_charge

Capacitors don't really store charge at all. They allow negative charge to be transferred from one plate to the other, thus establishing an electric field between their plates. But there is no net increase in charge -the amount of charge on the capacitor's plates, after 'charging', is exactly the same as there was before 'charging' -it's just moved around! What capacitors 'store' is energy, not charge.

Read more: http://wiki.answers.com/Q/How_do_capacitors_store_a_charge#ixzz2G2TVMN7k


Scholarship on the subject was dismissed in post # 45
I know of no scholarly article on common sense.

and then common sense was dismissed in post # 62
By the way, what does "common sense" have to do with this argument?

Silly me - i came in thinking it was a discussion.
 
  • #71
@cpatel23

Capacitors are great for quick discharges of energy that batteries could only dream of doing. The classical example is the flash of a camera. It would take a battery a long time to discharge the needed energy for the flash, and it would be beyond infuriating to have to wait standing still God knows how long until the camera finally releases the charge.

You will also learn in your electronics course that the Capacitors are also very useful in AC to DC converters because they help reduce the Ripple voltage.

As for the textbook, I highly recommend this one:

https://www.amazon.com/dp/0073380458/?tag=pfamazon01-20

I used a different one for my electronics course, and honestly speaking I didn't like it too much. It felt too theoretical without enough real life examples to understand what was going on. I will use the one in the link a gave above for my digital electronics class next semester and from what I've seen so far it is much better and easier to read than the one I used.

I suggest reading part one: Solid State Electronic and Devices. Parts two and three are for more advanced courses.

And just in case, this is the book I used for my course:
https://www.amazon.com/dp/0195323033/?tag=pfamazon01-20


If you are going to buy one, then I suggest the first one. If you will get them digitally, try to get both and use them as references.

Cheers.
 
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  • #72
Drakkith said:
There's no reason to be rude.

I don't think it's rudeness - it is just lack of empathy. Some people just latch on a particular interpretation of an idea and don't see the way the rest of the World (the 'informed' world) view it. They decide that they are 'right' and cannot reconsider. Can be quite a nightmare in personal dealings in the real world. Happily, on a forum like this it doesn't represent a problem.
 
  • #73
Thread closed for now. I'll try to have a look at it after the holiday.

EDIT -- Thread will just remain locked. Let's try not to be so argumentative over terminology, especially trying to push non-standard terminology.

Ratch -- check your PMs.
 
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