Re: Please clarify European resistor value notation for me

Eeyore wrote:


Joerg wrote:


Jan Panteltje wrote:


On a sunny day (5 Dec 2006 11:01:27 -0800) it happened "Mike Noone"
<nleahcim@xxxxxxxxx> wrote in
<1165345287.111425.180820@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:



Hi - Can somebody please verify that my understanding of European
resistor value notation is correct? My understanding is that the
magnitude (K/M) replaces the period, so 1K = 1K0, 1.2K = 1K2, 15M =
15M0. Also, when there isn't a magnitude (value under 1K) then an R is
added to the end - so 500 ohms = 500R, 10 ohms = 10R.

Is this all correct?


Yes.



Why are there two different notation schemes? To me the European
version seems unnecessarily complicated. I just don't see a need for
it.


It is simpler in Europe.
Americans still specify small caps in uF, and then say .001 uF,
we say 1nF.

That would mean it's simpler since we only have uF. Everthing is bigger
here 8-D)))


I can recall those schematics with thins like 0.0047uF on them and without fail
I have to think about it before it makes sense.


I got used to it. In fact, I am just drawing such a schematic on the other PC here. Do you remember the old schematics that would only say ..0047? Then there was the mmF and all that.


4n7 is far, far clearer and is easy to enter as 4.7e^-9 on a calculator as
opposed to 0.0047 e^-6 ( 3 less buttons to push ).


Most of the time I don't push buttons but slide the slide rule :-)

--
Regards, Joerg

http://www.analogconsultants.com
.

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