Talk:Circuit diagram

message: I moved this page back to its current location because 'circuit diagram' is far, far, far more common than 'electrical diagram' →Raul654 01:03, Mar 13, 2005 (UTC)
:Ok.  I just figured it was more accurate.  "Circuit" could mean more than just electrical.  I hope moving the Category "Circuit diagrams" to "Electrical diagrams" was not bad...  That took a while.  :-\ - Omegatron 02:03, Mar 13, 2005 (UTC)
*There's a duplicate here: https://en.wikipedia.org/wiki/Wiring_diagram  A merge should be considered. --24.114.96.14 (talk) 13:32, 23 July 2023 (UTC)
thread_title: Page name

message: *Schematic and circuit diagram should remain as separate articles, in my opinion. There are many types of schematics which have nothing to do with circuits.  Circuit diagram is certainly a big enough topic to desreve an article of its own. ike9898 15:02, 9 January 2007 (UTC)
replies: text: Oppose - see Talk:Wiring diagram. --Wtshymanski (talk) 21:24, 30 July 2023 (UTC)
thread_title:  Merge? 

message: the symbol for a resistor is a box. Dunno if that is just english but it should                                                                           be included --Slogankid 15:05, 9 January 2007 (UTC)
replies: text: Incorrect. That is a comon layout symbol for resistors, but is almost never used in schematics. 66.254.241.199 (talk) 22:15, 9 December 2007 (UTC)
replies: text:  Sorry, That was correct for the Brits, although the box is a really poor symbol choice, as it could very easily be mistaken as a symbol for an unknown 2 pin device. 66.254.241.199 (talk) 22:19, 9 December 2007 (UTC)
replies: text:  Actually the box symbol is the International Electrotechnical Commission's symbol for a resistor  —Preceding unsigned comment added by 193.61.104.4 (talk) 13:10, 9 October 2009 (UTC)
thread_title: resistors

message: I believe that schematics, although used to describe circuit diagrams, is too vague.  A schematic can be any rough representational diagram.  I feel that 'Electronic Schematic' may be more suitable.  ps... I agree with the above bit about box resistors.  The English way is boxes, th e American, and more common way, is to use zig-zags.
Jdedmond 20:04, 29 January 2007 (UTC)
thread_title: Schematics

message: Well, where are they? Article mentions that the euro/aussie codes differ, but does not show any of the american codes. TheJalAbides 19:01, 16 March 2007 (UTC)
replies: text: According to Inductance, the use of "L" for an inductor may honor Heinrich Lenz who made contributions to the understanding of inductance. Philhower (talk) 19:37, 14 October 2008 (UTC)
replies: text: I never really thought about why L. I assumed it was for the Looped wire that makes a coiL. 173.9.10.235 (talk) 16:08, 18 November 2010 (UTC)
thread_title: Where are the american designation codes?

message: Would the general Wikipedia reader would be interested in knowing that circuit diagrams stir surprisingly strong emotions in some people?
* "if you’re selling to engineers or IT folks, nothing says loving like a beautiful schematic. We love schematics!"
* "beautifully done schematic"
* "a beautiful schematic shows ..."
* "I got this beautiful schematic"
* "A lovely and visually symmetrical schematic."
and the opposite emotion:
* "those abhorrent European-style circuit symbols." 
* "It takes a computer to create such god awful ugly schematics"
--68.0.124.33 (talk) 04:24, 13 September 2008 (UTC)
replies: text: Some people have strong reactions to the oddest things.  I don't think this is necessary to mention in a general article and should be discussed in a more  appropriate article. --Wtshymanski (talk) 15:06, 13 September 2008 (UTC)
thread_title:  reactions to circuit diagrams 

message: A wiring diagram is not the same as a schematic diagram.  If you're trying to illustrate the concept and logic of a system, you would use a schematic.  If you're trying to build a control panel, you'd hand a wiring diagram (or these days, a wire list) to the panel shop to have them build it. A wiring diagram shows the wires and interconnections but may not give much of the sequence and operation of the circuit.  A schematic may not clearly show which wires are bundled in which cables, for example. Sometimes a schematic will carry more of the information associated with a wiring diagram such as terminal numbers (especially such things as intermediate terminal blocks) but not always. --Wtshymanski (talk) 13:36, 27 August 2009 (UTC)
thread_title: Not synonymous terms

message: For the last 35 years I learn to use the "old" CAD symbols for non-CAD drawings, with the notion that the "old non-CAD symbols" were used by our grandparents and are now obsolete.  — Preceding unsigned comment added by 178.78.75.150 (talk) 15:58, 31 March 2015 (UTC)
thread_title:  How old is old? 

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message: I believe that circuit diagrams may have been conventionally organized having the positive at the top and negative at the bottom (ground for single-supply circuits) due to the positive charge of the sky and negative of earth.
In Franklin's time, a stormy sky would have been described as having an excess of charge due to the observed cloud-to-cloud lightning and lightning apparently striking the ground, and therefore the sky would have been considered having a surplus of charge.
The original explanation for identifying the positive charge is credited to Benjamin Franklin in his experiment of charging a glass tube and then having a participant receive a shock to the knuckle.  The participant was said to have been positively charged after the shock.  Franklin also provided a way to identify a positive charge from a negative.
Two years after the glass tube experiment, he and his colleagues would have been experimenting with lightning attracted from rods, and would have found a stormy sky to be positively charged just like the charged glass tube, thus affirming the identification of a surplus of charge with the charge on the tube.
It would have been a century later that the movement of charge would be correctly identified with negatively charged electrons due to experiments performed with Crookes tubes.
In the intervening years, it would have been natural to draw diagrams having the positive charge above the negative (the ground) much as the sky is above the earth.  I am looking for evidence that this was the case.
--TreeOfKnowledge (talk) 16:21, 16 September 2019 (UTC)
replies: text: It seems likely to me that the left-to-right and top-to-bottom orientation is so because that matches the reading order of English text. - MrOllie (talk) 16:25, 16 September 2019 (UTC)
thread_title:  Diagram Organization