Talk:Voltage divider

message: A Common uses section would be useful. I'm trying to figure out if a voltage divider is a good way to step down a 12V power source to 5V, or if there's a better way... ~MDD4696 03:17, 7 July 2006 (UTC)
replies: text: This would be a really bad way to do it, as the voltage is dependent on load resistance.  You could do it with a voltage divider and a transistor, though.Flying fish 23:52, 24 March 2007 (UTC)
replies: text: A 7805 voltage regulator is designed for just such a use. DGerman (talk) 20:35, 12 February 2012 (UTC)

text: They are both standard symbols. — Omegatron 21:38, 18 January 2007 (UTC)

text: Done Aaronsharpe 16:22, 15 March 2007 (UTC)
thread_title:  Common uses 

message: I've moved "Voltage divider rule" back to "Voltage Divider", with the blessing of the original mover Karol Langner.  The article is more about the device than the equation, and there are more pages that link to voltage divider anyway. Flying fish 15:09, 8 April 2007 (UTC)
thread_title:  Page moved back to Voltage Divider 

message: It might be useful for this page to include an example where more than 2 resistors are used in the voltage divider to show how the voltage at various nodes is calculated. e.g. {(R1+R2)/(R1+R2+R3)}* Vin to provide the voltage at the first node after the first resistor in a circuit with 3 resistors and a device across the 2nd resistor (it would be the voltage at one of the device inputs). I realize it would be easier if I could provide a graphic of what I mean but I'm not able to do that right now so I hope my description is clear enough to explain what I mean. Thanks. Radiantbutterfly 20:12, 2 August 2007 (UTC)
thread_title:  Voltage divider with more than 2 resistors 

message: A voltage divider is not an amplifier so why is there a whole section on amplifiers? Biscuittin (talk) 20:54, 12 April 2008 (UTC)
replies: text: The section on amplifiers was put in on 7 January 2008 and nobody seems to have queried it.  Does anybody object if I delete it? Biscuittin (talk) 21:25, 12 April 2008 (UTC)
replies: text: Do you mean this section? It was put there to demonstrate a practical application of voltage dividers. There's also a similar section in the current divider article. Don't delete them, but you could combine them both into a new article (probably the best thing to do). Otherwise just add a cleanup tag or something. -Roger (talk) 22:03, 12 April 2008 (UTC)
thread_title:  Amplifier 

message: Hello. Should not we replace the impedance "Z" by  \tilde Z ? Newbies might get confused by the the symbol Z that is used for both for the complex value and the modulus. --Youssef (talk) 12:19, 11 May 2010 (UTC)
replies: text: I'm not sure what you mean. "Z" is consistently used in this article for a complex impedance. -Roger (talk) 16:17, 3 June 2010 (UTC)
replies: text: Hello. See for example the first paragraph of Electrical impedance. The impedance is normally a complex number. And complex number can be expressed by imaginary and real part or by modulus and phase. When we write "Z" without anything above the letter, conventially it means the modulus. However, some engineers do not find it easy to add that symbol so may write "Z" also for complex impedance. My point is that voltage divider rule, generalized Ohm rule, etc works only with complex impedance. Regards-- Youssef (talk) 12:03, 6 June 2010 (UTC)
replies: text:  Actually, it's not at all conventional to write complex numbers as such.  The electrical impedance article is weird, so I'm going to bring it up on that talk page alter it.  Oli Filth(talk|contribs) 12:06, 6 June 2010 (UTC)
thread_title:  Complex impedance and amplitude of the impedance 

message: Could someone please add some discussion regarding the selection of values.
# What are the ramifications of using 2 1K resistors verses 2 10K resistors?
# Using 1% resistors
# Using "real-world" values  i.e. what are good selections for a 20:1 divider?  DGerman (talk • contribs) 20:43, 12 February 2012 (UTC)
replies: text: -these will depend on your application-- how much resolution do you need for your code or circuit to work? how much current waste is ok? 0.5mA is too much, going to drain battery? then use 100k. >100k not usually used for a divider, usually like 10-50k I want to say...24.98.133.72 (talk) 22:59, 18 August 2014 (UTC)
thread_title:  Resistive values 

message: There is no circuit diagram for the Capacitive Divider indicating the positions of C1 and C2. Wmcallister (talk) 16:20, 20 May 2014 (UTC)
thread_title:  Capacitive Divider 

message: I dont think that an RC circuit can be properly called a voltage divider as its opartion depends on ac of a certain frequency. I intend to remove the RC network unless there are convincing arguments to keep it.86.187.170.222 (talk) 22:33, 15 December 2016 (UTC)
thread_title:  RC divider? No i dont think so 

message: I think the formulas laid out in the current version should take into account whether the source is current (DC) or alternating (AC). AXONOV (talk) ⚑ 08:57, 30 May 2023 (UTC)
replies: text: It doesn't make any difference. Constant314 (talk) 13:09, 30 May 2023 (UTC)
replies: text: Well I think the circuit on the right will behave a bit differently in AC mode supply. AXONOV (talk) ⚑ 18:55, 1 June 2023 (UTC)
replies: text: Yes it will, however, the formula is still correct.  Just set ω=0 and evaluate. Constant314 (talk) 19:03, 1 June 2023 (UTC)
thread_title:  AC/DC mode 

message: I arrived at this page as a user.  At the time I was using Ubuntu 22.04 and Chrome Version 122.0.6261.57 (Official Build) (64-bit).  The LaTex math formulae did not render. I see this: "$ V_{\mathrm {out} }={\frac {Z_{2}}{Z_{1}+Z_{2}}}\cdot V_{\mathrm {in} } $". I mistakenly thought it was a formatting issue on this page.  I tagged it, which tag was gently reverted.
I have since looked at other pages with the same OS/browser combo, which render in similar fashion.  So the problem is not unique to this page.  I used the same machine with Firefox browser and the LaTex renders perfectly. At this point, I don't know whether the problem is in Chrome or in Wikipedia's delivery of LaTex to Chrome.  Where IS the proper place to report this issue? Rhadow (talk) 15:00, 30 March 2024 (UTC)
replies: text: Try posting at Wikipedia:Village pump (technical). Lambtron talk 15:28, 30 March 2024 (UTC)

text: 1) On my computer, it has 64bit Chrome 123.0.6312.86 and this article seems to display fine. Before reporting, you should try some of the following: A) update to most recent browsers, B) clear your chrome browser cache at chrome://settings/clearBrowserData , C) temporarily disable all browser extensions and/or only for Wikipedia domain.  2) Afterward, please look at the following too. https://en.wikipedia.org/wiki/Wikipedia:FAQ/Problems - • Sbmeirow • Talk • 15:42, 30 March 2024 (UTC)

text: I just tried with Edge, Chrome, and Opera.  There were no problems. Constant314 (talk) 18:51, 30 March 2024 (UTC)
thread_title:  LaTex rendering