|WikiProject Electronics||(Rated Start-class, Mid-importance)|
I'm sure the zener diode should look like it has a Z across the end of it (this one looks more like an S)
- IEEE Std. 315-1975 section 220.127.116.11, page 140, shows the same symbol as shown in the article and describes it as a "unidirectional voltage regulator diode". What standard shows a Z? I don't see either a Z or S, myself.
- On the other hand, the vacuum tube symbols disagree with 18.104.22.168, which says an indirectly heated cathode shouldbe a straight line, not the pot-hook shown in these symbols. --Wtshymanski (talk) 13:39, 14 October 2010 (UTC)
The "Zener Diode" page has the symbol: http://en.wikipedia.org/wiki/File:Zener_diode_symbol-2.svg
which is quite different to the symbol on the "Diode" page: http://en.wikipedia.org/wiki/File:Zener_diode_symbol.svg
Also need a symbol for Circuit Breakers, which are mentioned in the abbreviations list. Other missing symbols (Relays, Motors, etc.) can be found by following the links provided, but no link, and no symbol on the Circuit Breaker Wiki page. --Arciver (talk) 19:06, 27 February 2012 (UTC)
The article states "ASME Y14.44-2008 continues the convention of Plug P and Jack J when assigning references for connectors in electrical assemblies where a J (or jack) is the more fixed and P (or plug) is the less fixed of a connector pair without regard to the gender of the connector contacts." which I believe is correct from my long ago study of the IEEE standard. However, the table below that statement lists J Jack connector (female) and P Plug connector (male). I suggest removing the female and male references as they contradict the statement in the text and the standards.Como andas (talk) 15:44, 18 November 2011 (UTC)
- I updated the article table to reflect the position taken by Wikipedia's Jack and Plug articles: "often, but not always," female/male. Wbm1058 (talk) 15:20, 30 November 2011 (UTC)
The external link to "International standard IEC 60617 DB Graphical symbols for diagrams" is a subscripion only link, and therefore I would suggest should be replaced with a publicly available authoritative link. Darkman101 (talk) 09:37, 13 May 2013 (UTC)
Not technically correct: reference to BS 3939
"Also known as BS 3939"
This is not absolutely correct - "BS 3939:2001" is "Aerospace series. Nickel base alloy NI-B46001 (NiCo20Si5B3). Filler metal for brazing. Powder or paste"
This could be misleading and/or confusing.
Specifically the part should be identified as part of the standard and also issue dates.
"BS 3939-1:1985" through "BS 3939-13:1985" would be correct - However they were withdrawn on 15 December 1996.
The most recent standards are "BS EN 60617-1:1996" through "BS EN 60617-13:1996", however these were withdrawn on 01 December 2005. No BS EN standard has replaced them.
It may be better to just remove the old reference to BS 3939 as there is no current version of it and just leave the reference to the IEC 60617-1 to IEC 60617-13. — Preceding unsigned comment added by Qzertyy (talk • contribs) 10:36, 8 August 2013 (UTC)
PNP Transistor Symbol and Rotation
The symbol is generally correct, but it is shown inconsistent with the other transistors symbols. It is standard practice to show the symbols for transistors of all types rotated so that the emitter or source is at the bottom. All of the other symbols used here are shown properly in this way. The idea that symbols are also used when rotated in 90-degree steps is valid, but a separate idea; this concept might be good to explain in the article.
Rich S 10001 (talk) 15:42, 7 September 2014 (UTC)
- Yes, technically it is correct to show any type of transistor in any rotation, but for clarify and uniformity they should be shown in the modern standard practice. Also, text should be added about the circle is optional for all transistors, though I'm not sure what is the "official" way to do it in 2014. I notice the circle is missing from high-density schematics (which is fine) especially describing the internals of IC chips, but it seems to be more common in lower density schematics. • Sbmeirow • Talk • 18:13, 7 September 2014 (UTC)
- Regarding rotation, it seems we agree that they should be shown in the modern standard practice, which would be for the PNP emitter to be at the bottom like the NPN symbol, and similar to the source terminals' location for the JFETs and MOSFETs. Regarding the circle, I was taught that was added to indicate a "sealed" or passivated transistor (glass-layer for protection). Some old transistors apparently were not so protected. I'll see if I can find my textbook or another source. I think most if not all transistors are passivated now for reliability, so the circle has become standard but omitting it is acceptable, like you stated. I think the circle is used for the ANSI/IEEE standard for transistors, while the European standard lacks it. • Rich S 10001 (talk) 18:34, 7 September 2014 (UTC)
Public Domain Symbols
I'd like to see all the symbols in this article updated with a similar look / line width /text, so the drawings doesn't look like they came from random places. If anyone knows of "public domain" symbols that could be used in this article, please respond with a link to them. We must have proof they are "public domain" and/or meets the Wikipedia copyright requirements. If we can find symbols from one good source, then we could switch at some point in the future. We need to find SVG (vector) or PNG (bitmap) file formats, since some fuzzy symbols in this article are JPG (arg!!!). • Sbmeirow • Talk • 18:20, 7 September 2014 (UTC)