Ω vs R and μF vs uF

Question

When designing board what is the recommendation for putting in the values for resistors and capacitors?

Should I use the Greek letters or use the Latin equivalents.

Does this make any difference when using "Design Link" ?

jw0752 · Accepted Answer

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

johnbeetem · Answer

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.

mcb1 · Answer

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

Ω vs R and μF vs uF

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