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Resistor Colour Codes

codes are correct. third band is your multiplier., this would make the R 56 Ohms. 0 meaning no zero's after 56. 1 meaning 1 zero which would be a brown ring how ever, the gold band is your +/- 5% accuracy of the marked reading. the brown band, because it comes after the tolerance reading normally used for quality and other markings. you make see at times were you only have 2 color bands and then a gold or Silver band, this is a fraction multiplier. gold being X 0.1 of the first 2 digits, and silver being x 0.01 etc./ you make also see another gold/silver band following it that would then indicate the tolerance. there are in some cases for more precise values 4 bands for R value and then the Multiplier. you will know when you have one of these due to the fact that gold/silver band will not appear until after 4 color bands. R,R,R,M,T instead of the R,R,M,T etc.. hope that helped some.

Reply to
Jamie
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Capacitors are also numbered with this annoying scheme. A cap numbered xyz is xy*10^z pF. A 100 cap is a 10pF cap. I would have prefered strict scientific notation (which would have allowed 10ths of pF), but it was probably invented before the widespread adoption of that notation.

Inductors also have the same numbering scheme, but their numbering is in uH, not pF. Ugh. Inductors sometimes have the color bands to indicate their values.

--
Regards,
   Robert Monsen

"Your Highness, I have no need of this hypothesis."
     - Pierre Laplace (1749-1827), to Napoleon,
        on why his works on celestial mechanics make no mention of God.
Reply to
Robert Monsen

Hi, I have a resistor that is showing up as 56.0 Ohms on a multimeter but the colour code seems to say 560 Ohms.

Green Blue Black Gold Brown

5 6 0 ?? 1% Tolerance

What does the gold mean?

Thanks for ya time guys.

Reply to
Richard Harris

the

Maybe it's really Brown and not Black for the third band?

+/-5%
Reply to
Anthony Fremont

Sorry Please Ingore.

Reply to
Richard Harris

Multiply 56 by 10 raised to the Zero power , wich is 1 not 10.

Charles

Reply to
Charles W. Johson Jr.

"Richard Harris" wrote in news:csoq9r$8vr$1 @sparta.btinternet.com:

that's:

5 6 0 1/10 1% Tolerance

for 560/10=56.0 +/- .56 ohms. A "precision" resitor.

Reply to
me

but

I know, but I think of it like the third digit is just the number of zeros. Six to one, half dozen.....

Reply to
Anthony Fremont

Green - 5 Blue - 6 Black - 0 Gold - multiplied by 10^-1 ie. 0.1 Brown - 1%

Hence 56 ohms.

That's the way it's done with five band resistors for values below 100 ohms

Divide by 10 (multiply by 0.1)

--
Then there's duct tape ... 
              (Garrison Keillor)
Reply to
Fred Abse

I think of the third color as "number of zeroes." For instance, Yellow-Violet-Red is 4-7 plus two zeroes, or 4.7K. Other posters are correct that the third band is a power of 10 multiplier, but for ease of remembering and calculation, "number of zeroes to add" works for me.

The tolerance. I think gold is 1%. There are other color bands that can creep in in different situations. For instance, a gold third band means multiply by 10^-1, or one-tenth, which would make your resistor

5.6 Ohms if the third band were gold, not black.

Reply to
Kitchen Man

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