Ohm Resistors?

Question

What is the coded resistance of a 1000 ohm, a 470 ohm and a 100 ohm resistors? Or how can i figure them out myself?

Answer 1

In Milwaukee they used to teach it this way:

"Blatz Beer Rots Our Young Guts, But Violet Goes Willingly"

Black Brown Red Orange Yellow Green Blue Violet Grey White
-- 0 ------ 1 ---- 2 ------ 3 -------- 4 ------ 5 ---- 6 ----- 7 ----- 8 ------ 9

The first two colors designate numbers, the third color defines the number of zeros.

Answer 2

The answers with the color code are perfect.

Nowadays resistors are all made together by high speed machines. When the machine makes a day's worth of 100 ohm resistors they pass to a second machine which measures each one's resistance. Those from the day that are within 99 to 101 ohms are labeled as 1% tolerance. Similarly for 5%, 10%, and 20%. If they happen to hit another value like 470 ohms they can be labeled as precision ones for 470. In reality they all came from the same run and some just happen to fall closer to a right answer so they sell for much more than the others.

Answer 3

Before transistors when computers used tubes, or valves in the UK, we were taught,

Bad Boys Risk(?) Our Young Girls But Violet Gives Willing
Black Brown Red Orange Yellow Green Blue Violet Grey White
0 1 2 3 4 5 6 7 8 9

I'll admit it doesn't sound nice but before this solid state stuff it was all soldered in and you needed a crutch. If I can remember it 45 years later it worked.

Three B's? Easy, Black has an 'A'. Brown has an 'O', Blue has a 'U'. I remembered Girls was Green because the first time I saw my girlfriend she was wearing a beautiful Green Wool suit. But you can also go with the 'E' in Grey.

Gold was the tightest tolerance, Silver was next. Imagine, they were hand tested and banded. Today I doubt if you could find a resister as out of tolerance as the ones we had with no band,

Answer 4

If all resistors had the same power rating and the same tolerance, the two separate 1k ohm resistors would have twice the power dissipation of the single 2k ohm resistors; and the actual measured resistance of the two series 1k ohm resistors would likely be closer to 2k ohms than the single 2k ohm resistor. The power dissipation is doubled because you'd be dissipating half of the power in each of the 1k ohm resistors when connected in series.

Answer 5

Yellow-Violet-Brown-Gold

* 470 Ω

Answer 6

1000 ohm is brn, blk, red
470 ohm is yel, violet, brn
100 ohm is brn, blk, brn
color code is blk(0), brn(1), red(2), org(3), yel(4), grn(5),
blu(6), vio(7), gry(8), wht(9)
1st color is 1st digit
2nd color is 2nd digit
3rd color is number of zero

Answer 7

Here's a good site for you ... It takes a few seconds to load ..

http://www.ee.unb.ca/thesis98/ee4000aj/Resistor2.html

Answer 8

Hi. BBROYGBVGW is the sequence. http://acronyms.thefreedictionary.com/BBROYGBVGW
How to decipher http://xtronics.com/kits/rcode.htm