Re: Please clarify European resistor value notation for me

Eeyore wrote:


Joerg wrote:


Eeyore wrote:

Joerg wrote:

Jim Thompson wrote:

Joerg <notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:


Just imagine a missing dot on a 2.2ohm inrush limiter and someone puts a
22ohm in there. Click - POOF.

The way I work a missing dot would get caught at LVS (layout versus
schematic), the netlists wouldn't match.

Well, yes, same here. But that doesn't help the poor guy who reads a
faded schematic and thinks, wow, I've got that 22ohms right here.


This is where the 'European' scheme wins hands down.

So how do they write 2.2 Ohms?


2R2.

In the 70s the idea was floated to use 'E' as in 2E2 - and I've seen it used a
few times but R ended up being adopted .


Ouch! E as in Eurocrat? That would collide with pretty much any SW and scientific convention where they use that as exponent header. 5E6 would then be interpreted as 5.6 by a few and 5M by most others.


When drawing circuits on a piece of paper I far prefer the old style ( US )
method of drawing a resistor though.

I don't 'get' the funny US caps with curly plates though.


On CAD I do. Can be very handy when you need to indicate where the outside layer should be connected to. That can matter a lot in audio gear.

--
Regards, Joerg

http://www.analogconsultants.com
.