On Sat, 06 Dec 2008 22:43:58 +0000, Eeyore
wrote:



John Fields wrote:

Eeyore wrote:
Tom Del Rosso wrote:
"Eeyore" wrote
Tom Del Rosso wrote:

U is 100% unambiguous too. It means IC.

Like converting pounds to kg makes sense too ?


Why use another letter when you 2 that describe the part properly ?

I first saw U on a schematic around 1980, because that's when I first saw
schematics of a commercial product. Before that, all I had seen were the
diagrams in Popular Electronics magazine, and they always used IC.

So honestly, it conveys a meaningful distinction for me. When I see U that
tells me it is (more likely to be) a professional design.

What a curious idea !

---
Not at all, and he's right, as borne out by the fact that I use the
reference designator 'U' for integrated circuits, while you use 'IC'.

I know a European company that uses I. Even I disapprove of that.

What reference (and symbol) would you use for an MOV btw ?

---
ZXX
|\ \ /|
---| | |---
|/ \ \|

Or a Polyswitch ?

__
___/\/ __
__/\/
FXX

On btw - using the dual letter thing I've even used CE for capacitor electrolytic.

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That has no business being on the schematic or the PCB; it belongs on
the BOM.

Besides, it's confusing since it could cause someone to think it refers
to that goofy euro self-certifying 'CE' marking.

JF