Electropedia: The world's online electrotechnical vocabulary | Hacker News Reader

Electropedia: The world's online electrotechnical vocabulary

electropedia.org

94 pointsgjvc11 comments

This is Electropedia's definition for "geosynchronous satellite" at https://www.electropedia.org/iev/iev.nsf/display?openform&ie...:

  a synchronous satellite of the Earth
  Note – The sidereal period of rotation of the Earth is about 23 hours 56 minutes.

They also have the same definition in other languages.

It's not wrong, but compare it to the richness of Wikipedia's article on the same subject: https://en.wikipedia.org/wiki/Geosynchronous_satellite

Maybe it's unfair because space and orbital mechanics are somewhat outside of Electropedia's stated focus on "electrotechnology". But their blurbs on electrical terms are still terse compared to Wikipedia.

Also, Wikipedia's url itself is more informative than the "725-11-65" you get from Electropedia.

Notably, Electropedia is not a wiki, so there is more assurance that the information in it has been reviewed by an actual expert. It just seems kind of sparse.

Could this be linked with Wikidata and, if need be, https://www.wikidata.org/wiki/Wikidata:Lexicographical_data

There already is https://www.wikidata.org/wiki/Property:P8855

My brain went right to search for 2 terms I want everyone to get correct.. still no definitive source to search for the meaning of VCC and VDD. I still see people get this wrong _all the time_.

That's because they get the meaning from the environment (i.e. datasheets, schematics). And writing a good datasheet is hard and the companies who did this are mostly gone ( Hello Motorola).

Collector and Drain, I thought?

with a stutter? what are the repeated letters for, redundancy?

The repeated letters are to say "not necessarily the collector of _this_ transistor (which may be, for instance, the bottom of a push-pull pair), but the collector of the most-collector-ward transistor".

Explained here: https://en.wikipedia.org/wiki/IC_power-supply_pin

I think this WP article is rather illuminating:

https://en.m.wikipedia.org/wiki/IC_power-supply_pin

Precisely how do you define definitive so that we might better understand what you assert to be wrong?

My naive intuition suspects he knows, so here's a contrarian curveball pulled directly out of JEDEC JESD88 Dictionary of Terms for Solid-State Technology[1] to consider (my emphasis):

> drain power voltage (VDD): The primary power voltage on MOS devices that require a potential that differs from the normal system logic voltage. The term VDD is used interchangeably with VCC on devices that use 5‑V supplies.

[1] https://www.jedec.org/standards-documents/dictionary/terms/d...

I think this should have been named wikEEpedia.

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