Started by January 30, 2021
```I can put a resistor after a voltage that's too high for the circuit?

Of course the resistor must handle the current.

A decoupling capacitor after the resistor.

Any problems with that?

Thanks.
```
```On 2021-01-30, John Doe <always.look@message.header> wrote:
> I can put a resistor after a voltage that's too high for the circuit?
>
> Of course the resistor must handle the current.
>
> A decoupling capacitor after the resistor.
>
> Any problems with that?

If the capacitor is needed there probably are problems.

In the spirit of your question that is all I will say.
--
Jasen.
```
```John Doe <always.look@message.header> wrote:
> I can put a resistor after a voltage that's too high for the circuit?
>
> Of course the resistor must handle the current.
>
> A decoupling capacitor after the resistor.
>
> Any problems with that?

If your load has a variable current draw, then you will also have a
variable voltage on the load side of the resistor.
```
```Rich wrote:

> John Doe wrote:

>> I can put a resistor after a voltage that's too high for the circuit?
>>
>> Of course the resistor must handle the current.
>>
>> A decoupling capacitor after the resistor.
>>
>> Any problems with that?
>
> If your load has a variable current draw, then you will also have a
> variable voltage on the load side of the resistor.

If it's a big capacitor, the voltage variation is minimal?
```
```John Doe <always.look@message.header> wrote:
> Rich wrote:
>
>> John Doe wrote:
>
>>> I can put a resistor after a voltage that's too high for the circuit?
>>>
>>> Of course the resistor must handle the current.
>>>
>>> A decoupling capacitor after the resistor.
>>>
>>> Any problems with that?
>>
>> If your load has a variable current draw, then you will also have a
>> variable voltage on the load side of the resistor.
>
> If it's a big capacitor, the voltage variation is minimal?

No, the size of the capacitor simply determines the rate at which the
voltage changes.  Given a current draw change of sufficient length in
time (length determined by capicator size), the voltage across the
capacitor will settle to that which remains after the new drop across
the resistor.

Wire up a test circuit on a breadboard and measure the changes
yourself.
```
```Rich <rich@example.invalid> wrote:

> John Doe wrote:
>> Rich wrote:
>>> John Doe wrote:
>>
>>>> I can put a resistor after a voltage that's too high for the circuit?
>>>>
>>>> Of course the resistor must handle the current.
>>>>
>>>> A decoupling capacitor after the resistor.
>>>>
>>>> Any problems with that?
>>>
>>> If your load has a variable current draw, then you will also have a
>>> variable voltage on the load side of the resistor.
>>
>> If it's a big capacitor, the voltage variation is minimal?
>
> No, the size of the capacitor simply determines the rate at which the
> voltage changes.

Then your answer should be "Yes", given the same amount of time.

Why are you fighting this?

Do you think it makes you look smart?
```
```John Doe <always.look@message.header> wrote:
> Rich <rich@example.invalid> wrote:
>
>> John Doe wrote:
>>> Rich wrote:
>>>> John Doe wrote:
>>>
>>>>> I can put a resistor after a voltage that's too high for the
>>>>> circuit?
>>>>>
>>>>> Of course the resistor must handle the current.
>>>>>
>>>>> A decoupling capacitor after the resistor.
>>>>>
>>>>> Any problems with that?
>>>>
>>>> If your load has a variable current draw, then you will also have
>>>> a variable voltage on the load side of the resistor.
>>>
>>> If it's a big capacitor, the voltage variation is minimal?
>>
>> No, the size of the capacitor simply determines the rate at which
>> the voltage changes.
>
> Then your answer should be "Yes", given the same amount of time.

No, the correct answer is "no".  The voltage variation can be
substantial.  Rate of change is a different measure than voltage
magnitude.

> Why are you fighting this?

Note that I could ask you the same question.  My answer is correct,
yours is incorrect.

```
```No, thanks anyway...

--
Rich <rich@example.invalid> wrote:

> From: Rich <rich@example.invalid>
> Newsgroups: sci.electronics.basics
> Subject: Re: Use resistor instead of regulator?
> Date: Mon, 1 Feb 2021 14:59:53 -0000 (UTC)
> Organization: A noiseless patient Spider
> Lines: 35
> Message-ID: <rv9519\$1l9\$1@dont-email.me>
> References: <rv455v\$6ho\$1@dont-email.me> <rv4oh1\$cfb\$1@dont-email.me> <rv6617\$2rs\$9@dont-email.me> <rv6ijs\$qed\$1@dont-email.me> <rv8ogi\$sku\$8@dont-email.me>
> Injection-Date: Mon, 1 Feb 2021 14:59:53 -0000 (UTC)
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> Cancel-Lock: sha1:LBNwrlosj8h+C/mmb8/JDn9V+kU=
>
>> Rich <rich@example.invalid> wrote:
>>
>>> John Doe wrote:
>>>> Rich wrote:
>>>>> John Doe wrote:
>>>>
>>>>>> I can put a resistor after a voltage that's too high for the
>>>>>> circuit?
>>>>>>
>>>>>> Of course the resistor must handle the current.
>>>>>>
>>>>>> A decoupling capacitor after the resistor.
>>>>>>
>>>>>> Any problems with that?
>>>>>
>>>>> If your load has a variable current draw, then you will also have
>>>>> a variable voltage on the load side of the resistor.
>>>>
>>>> If it's a big capacitor, the voltage variation is minimal?
>>>
>>> No, the size of the capacitor simply determines the rate at which
>>> the voltage changes.
>>
>> Then your answer should be "Yes", given the same amount of time.
>
> No, the correct answer is "no".  The voltage variation can be
> substantial.  Rate of change is a different measure than voltage
> magnitude.
>
>> Why are you fighting this?
>
> Note that I could ask you the same question.  My answer is correct,
> yours is incorrect.
>
>
>

```
```On 2/02/2021 4:11 am, John Doe wrote:
> No, thanks anyway...
>
So bugger off and do it know it all.You don't need advice from us humble
mortals !!
```
```Lots of reasons for non-answers, crappy answers, and venting. When a group
is dying, for example. Non-answers are entirely understandable and no
problem with me. Normally, people answer questions because they like the
question, and because they want to see their writing on USENET. Then there
are not-quite-grown-ups who love playing with an imaginary kill file
friend (they are not skilled enough to control).

This netcop wannabe troll can go fuck itself...

--
RheillyPhoull <Rheilly@bigslong.com> wrote:

> NNTP-Posting-Date: Mon, 01 Feb 2021 19:55:35 -0600
> Subject: Re: Use resistor instead of regulator?
> Newsgroups: sci.electronics.basics,free.spam
> References: <rv455v\$6ho\$1@dont-email.me> <rv4oh1\$cfb\$1@dont-email.me> <rv6617\$2rs\$9@dont-email.me> <rv6ijs\$qed\$1@dont-email.me> <rv8ogi\$sku\$8@dont-email.me> <rv9519\$1l9\$1@dont-email.me> <rv9na2\$thk\$2@dont-email.me>
> From: RheillyPhoull <Rheilly@bigslong.com>
> Date: Tue, 2 Feb 2021 09:55:34 +0800
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