Larry's Reference Designations blog on techexplorations

Schematic Library Symbols
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Hi, the blog Reference Designations For Electrical & Electronics Parts & Equipment, which I found referenced in multiple topics does not seem to be available any more. (File not found).
I’m looking for the full list of pcb designation abbreviations (the ones I found on line are quite partial, except ones that seem to be google-translated from Russian)

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Missing from the Wayback Machine archive unfortunately

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Yes, I looked there too…

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you could try reaching the author of the post @9V1MI or the (at least I think) responsible for the website @peter-dalmaris to see if this is just and oversight or if there is any other copies available.

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Try these two:
https://www.pcblibraries.com/Forum/common-pcb-reference-designators_topic728.html

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Yes, I saw these…
I’m trying to figure out what’s the difference between “RT” and “PT”…

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Chris56000’s reply here seems more complete: https://www.eevblog.com/forum/eda/reference-designator-for-components/.

But I hoped to find a more thorough discussion about the multitude of standards in @9V1MI 's blog…

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I have been engineering for > 40 years and I would like to know why the nomenclature is so important? I do see a lot of standardization but also a fair amount of variation.

I am not sure if this is the answer you want, but I think of RT as usually being a thermistor. Usually NTC but sometimes PTC. I suspect that PT is probably a platinum temperature sensor. I have heard of them often enough but have no direct familiarity with those.

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“PT” is not a viable class letter, at least according to IEEE 315 Clause 22.4. “RT” is the class letter for a thermistor.

I tried to find my blog posting on <techexplorations.com> but could not find it. I will send a message to Peter to see what has happened and if he will re-post my articles.
–Regards, Larry

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Hello everybody,
I did get a hold of Peter Dalramis and this was his explanation: He changed websites a while back and my articles were inadvertently dropped. He had backup copies and has now posted them at https://techexplorations.com/guides/kicad/reference-designators/introduction/. Peter also said you can get there by using the old URL as he has set up a redirection.

If you have further questions you can e-mail me at my e-mail address as posted in the articles.
–Regards, Larry

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Thanks!!

This is much appreciated!

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