Vjylku

Why is the design of haulage companies so “special”?

How did the USSR manage to innovate in an environment characterized by government censorship and high bureaucracy?

"which" command doesn't work / path of Safari?

Why CLRS example on residual networks does not follows its formula?

Should I join an office cleaning event for free?

What would happen to a modern skyscraper if it rains micro blackholes?

I probably found a bug with the sudo apt install function

Why don't electron-positron collisions release infinite energy?

How old can references or sources in a thesis be?

How can the DM most effectively choose 1 out of an odd number of players to be targeted by an attack or effect?

Copenhagen passport control - US citizen

How is it possible for user's password to be changed after storage was encrypted? (on OS X, Android)

Can Medicine checks be used, with decent rolls, to completely mitigate the risk of death from ongoing damage?

Is Social Media Science Fiction?

Are tax years 2016 & 2017 back taxes deductible for tax year 2018?

Is there really no realistic way for a skeleton monster to move around without magic?

Why is an old chain unsafe?

Why are 150k or 200k jobs considered good when there are 300k+ births a month?

Copycat chess is back

Concept of linear mappings are confusing me

Why is "Reports" in sentence down without "The"

How to make payment on the internet without leaving a money trail?

Can you lasso down a wizard who is using the Levitate spell?

Do airline pilots ever risk not hearing communication directed to them specifically, from traffic controllers?

Why do we use polarized capacitor?

Why does the LM1117 data sheet specifically specify tantalum capacitors?Amplifier capacitorsWhat happens to a polarity sensitive capacitor when you feed a square wave through it?Why are capacitors with large values are manufactured polarized?Why does capacitor polarity matter?Is it safe to use series polarized capacitors to form non-polarized capacitors to be used for higher rated voltage?Replacement of Tantalum CapacitorWhy is this power cable sometimes polarized and sometimes not?Can I use polarized capacitors in a location where they shouldn't be polarized?Non-Polarized Electrolytic Capacitor Replacement

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

2

1

$begingroup$

I want to know is the polarized capacitor has the advantage that they are used in some circuits?

For example, in a schematic of the BISS001 PIR controller IC, in some places, a polarized capacitor is used and in some places a non-polarized capacitor one.

Can I use a non-polarized capacitor with the same voltage and capacitance instead of these polarizing capacitors?

Reference Docs:

1.BISS001 datasheet

2.HC-SR501 PIR MOTION DETECTOR datasheet

3.Grove - PIR Motion Sensor or EasyEDA link

---

What I've understand from your answers is why the electrolytic capacitors are used, and why these are polarized.
But the designers of this circuit could have used a non-polarized capacitor or even polarized tantalum capacitors. Is it true? As the (Grove - PIR Motion Sensor) module uses polarized tantalum capacitors.

I want to know is the polarized capacitors are being used for circuit protection or is there any other reason(Regardless of the type of capacitor)?
Is there a problem if these capacitors are replaced with non-polarized capacitors in this circuits?

capacitor circuit-design polarity

share|improve this question

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It's not because we want them polarized, but them being polarized is a consequence of how they'r emade.
  $endgroup$
  – Hearth
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Compare the prices of electrolytic caps with ceramic (or film) caps in the range of 10uF ~22uF (after taking bias voltage derating into consideration) and you will have one of the reasons.
  $endgroup$
  – Wesley Lee
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The very thin oxide layers, providing insulation for a certain polarity, provides a very compact energy storage module. Just view those useful electrolytic capacitors as early versions of self-assembled-nano-tech; the manufacturing process creates the very thin oxide layer: the oxide is GROWN or FORMED.
  $endgroup$
  – analogsystemsrf
  6 hours ago
  

  
  
  
  

add a comment | 

2

1

$begingroup$

I want to know is the polarized capacitor has the advantage that they are used in some circuits?

For example, in a schematic of the BISS001 PIR controller IC, in some places, a polarized capacitor is used and in some places a non-polarized capacitor one.

Can I use a non-polarized capacitor with the same voltage and capacitance instead of these polarizing capacitors?

Reference Docs:

1.BISS001 datasheet

2.HC-SR501 PIR MOTION DETECTOR datasheet

3.Grove - PIR Motion Sensor or EasyEDA link

---

What I've understand from your answers is why the electrolytic capacitors are used, and why these are polarized.
But the designers of this circuit could have used a non-polarized capacitor or even polarized tantalum capacitors. Is it true? As the (Grove - PIR Motion Sensor) module uses polarized tantalum capacitors.

I want to know is the polarized capacitors are being used for circuit protection or is there any other reason(Regardless of the type of capacitor)?
Is there a problem if these capacitors are replaced with non-polarized capacitors in this circuits?

capacitor circuit-design polarity

share|improve this question

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It's not because we want them polarized, but them being polarized is a consequence of how they'r emade.
  $endgroup$
  – Hearth
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Compare the prices of electrolytic caps with ceramic (or film) caps in the range of 10uF ~22uF (after taking bias voltage derating into consideration) and you will have one of the reasons.
  $endgroup$
  – Wesley Lee
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The very thin oxide layers, providing insulation for a certain polarity, provides a very compact energy storage module. Just view those useful electrolytic capacitors as early versions of self-assembled-nano-tech; the manufacturing process creates the very thin oxide layer: the oxide is GROWN or FORMED.
  $endgroup$
  – analogsystemsrf
  6 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

I want to know is the polarized capacitor has the advantage that they are used in some circuits?

For example, in a schematic of the BISS001 PIR controller IC, in some places, a polarized capacitor is used and in some places a non-polarized capacitor one.

Can I use a non-polarized capacitor with the same voltage and capacitance instead of these polarizing capacitors?

Reference Docs:

1.BISS001 datasheet

2.HC-SR501 PIR MOTION DETECTOR datasheet

3.Grove - PIR Motion Sensor or EasyEDA link

---

What I've understand from your answers is why the electrolytic capacitors are used, and why these are polarized.
But the designers of this circuit could have used a non-polarized capacitor or even polarized tantalum capacitors. Is it true? As the (Grove - PIR Motion Sensor) module uses polarized tantalum capacitors.

I want to know is the polarized capacitors are being used for circuit protection or is there any other reason(Regardless of the type of capacitor)?
Is there a problem if these capacitors are replaced with non-polarized capacitors in this circuits?

capacitor circuit-design polarity

share|improve this question

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 18 mins ago

Community♦

1

edited 18 mins ago

Community♦

1

asked 7 hours ago

hamid mousavihamid mousavi

112

New contributor

hamid mousavi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 7 hours ago

hamid mousavihamid mousavi

112

1 Answer
1

active

oldest

votes

11

$begingroup$

The physical size of a capacitor is a function of the thickness of the dielectric (among other things).

Early on, it was discovered that the oxides of certain metals (aluminum and tantalum in particular) made good dielectrics, and could be made very thin through a chemical process — orders of magnitude thinner than other dielectrics such as waxed/oiled paper and plastic film. Therefore, the electrolytic capacitor was invented to provide high capacitance in a reasonable volume.

Unfortunately, the chemical process requires that the voltage across the capacitor must have only a single polarity, so these capacitors are "polarized". Reversing the polarity degrades and eventually destroys the oxide layer. It's something we just have to live with in order to take advantage of this technology.

---

The ability to produce high-value capacitors in nonpolarized technologies such as multilayer ceramic means that it is now possible to use them where only a polarized capacitor would have been previously available. There is generally no problem with making this substitution, although you may need to consider some of the quirks of the technology you're switching to.

For example, some high-K (high dielectric constant) ceramics exhibit significant capacitance changes with voltage. This might be acceptable in a coupling or bypass application, but completely unacceptable in a filter design.

share|improve this answer

edited 4 hours ago

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

$endgroup$

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
});
});
}, "mathjax-editing");

StackExchange.ifUsing("editor", function () {
return StackExchange.using("schematics", function () {
StackExchange.schematics.init();
});
}, "cicuitlab");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "135"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});

hamid mousavi is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f431310%2fwhy-do-we-use-polarized-capacitor%23new-answer', 'question_page');
}
);

Post as a guest

Name

Email

Required, but never shown

11

$begingroup$

The physical size of a capacitor is a function of the thickness of the dielectric (among other things).

Early on, it was discovered that the oxides of certain metals (aluminum and tantalum in particular) made good dielectrics, and could be made very thin through a chemical process — orders of magnitude thinner than other dielectrics such as waxed/oiled paper and plastic film. Therefore, the electrolytic capacitor was invented to provide high capacitance in a reasonable volume.

Unfortunately, the chemical process requires that the voltage across the capacitor must have only a single polarity, so these capacitors are "polarized". Reversing the polarity degrades and eventually destroys the oxide layer. It's something we just have to live with in order to take advantage of this technology.

---

The ability to produce high-value capacitors in nonpolarized technologies such as multilayer ceramic means that it is now possible to use them where only a polarized capacitor would have been previously available. There is generally no problem with making this substitution, although you may need to consider some of the quirks of the technology you're switching to.

For example, some high-K (high dielectric constant) ceramics exhibit significant capacitance changes with voltage. This might be acceptable in a coupling or bypass application, but completely unacceptable in a filter design.

share|improve this answer

edited 4 hours ago

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

$endgroup$

add a comment | 

11

$begingroup$

The physical size of a capacitor is a function of the thickness of the dielectric (among other things).

Early on, it was discovered that the oxides of certain metals (aluminum and tantalum in particular) made good dielectrics, and could be made very thin through a chemical process — orders of magnitude thinner than other dielectrics such as waxed/oiled paper and plastic film. Therefore, the electrolytic capacitor was invented to provide high capacitance in a reasonable volume.

Unfortunately, the chemical process requires that the voltage across the capacitor must have only a single polarity, so these capacitors are "polarized". Reversing the polarity degrades and eventually destroys the oxide layer. It's something we just have to live with in order to take advantage of this technology.

---

The ability to produce high-value capacitors in nonpolarized technologies such as multilayer ceramic means that it is now possible to use them where only a polarized capacitor would have been previously available. There is generally no problem with making this substitution, although you may need to consider some of the quirks of the technology you're switching to.

For example, some high-K (high dielectric constant) ceramics exhibit significant capacitance changes with voltage. This might be acceptable in a coupling or bypass application, but completely unacceptable in a filter design.

share|improve this answer

edited 4 hours ago

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

$endgroup$

add a comment | 

$begingroup$

The physical size of a capacitor is a function of the thickness of the dielectric (among other things).

Early on, it was discovered that the oxides of certain metals (aluminum and tantalum in particular) made good dielectrics, and could be made very thin through a chemical process — orders of magnitude thinner than other dielectrics such as waxed/oiled paper and plastic film. Therefore, the electrolytic capacitor was invented to provide high capacitance in a reasonable volume.

Unfortunately, the chemical process requires that the voltage across the capacitor must have only a single polarity, so these capacitors are "polarized". Reversing the polarity degrades and eventually destroys the oxide layer. It's something we just have to live with in order to take advantage of this technology.

---

The ability to produce high-value capacitors in nonpolarized technologies such as multilayer ceramic means that it is now possible to use them where only a polarized capacitor would have been previously available. There is generally no problem with making this substitution, although you may need to consider some of the quirks of the technology you're switching to.

For example, some high-K (high dielectric constant) ceramics exhibit significant capacitance changes with voltage. This might be acceptable in a coupling or bypass application, but completely unacceptable in a filter design.

share|improve this answer

edited 4 hours ago

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

$endgroup$

share|improve this answer

edited 4 hours ago

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267

answered 6 hours ago

Dave Tweed♦Dave Tweed

123k9152267