Ω vs R and μF vs uF

Hi Andy, Like many things today the rules are more flexible. From a purely scientific approach the Greek letters are more correct but the unavailablity of the Greek letters on many applications and computers make the more common replacements acceptable. I always use the uF when working on the computer and the Greek when hand writing. As long as you label for best communication and understanding you will probably not encounter any problems.

John

The convention I use (and have seen used a lot) is not to show any unit for resistors, since they are usually the most common part.  So "100" means a 100Ω resistor and "1K" means 1KΩ.  Everybody else gets a unit, like 0.1uF capacitor or 8mH inductor.  I always use "uF" for μF in schematics -- this has been a common substitute for decades (at least).  Relying on the Symbol font to be present can be risky -- I've seen data sheets that recommend 1KW resistors when they meant 1KΩ.

The convention I use (and have seen used a lot) is not to show any unit for resistors, since they are usually the most common part.  So "100" means a 100Ω resistor and "1K" means 1KΩ.  Everybody else gets a unit, like 0.1uF capacitor or 8mH inductor.  I always use "uF" for μF in schematics -- this has been a common substitute for decades (at least).  Relying on the Symbol font to be present can be risky -- I've seen data sheets that recommend 1KW resistors when they meant 1KΩ.

I've tended to see R for the resistors this means you don't require the appropriate font.

ie 100R for 100 ohms, 1k5 for 1500 Ohms or 1R5 for a 1.5 ohm

This tends to work since the little tiny dot often disappears or is hard to read ...etc

Mark

What you describe is actually an international standard of the SI system. I wouldn't be so smart except that Shabaz gave me a link today to something else and they had a paragraph about the SI system. It makes really good sense and I will convert to it in my notation henceforth. Unfortunately we cling to our antiquated systems here in the US so it may be a while before our schools follow suit.

John

Unfortunately we cling to our antiquated systems here in the US

Yes I noticed except I do like cubic inches, and the more the faster it goes.....

That may be why I've been seeing it more .... thanks

Mark

Unfortunately we cling to our antiquated systems here in the US

In the UK we do tend to mix things here which I find very annoying, I'll stick with the SI units that makes the most sense. Cadsoft seems to have a strong German team so I should be good with that and my experiments are consistent with what others suggested in that the characters are mostly ignored.

I mix them and don't find a problem