How to read the value of a resistor by reading the color bands?This will be the easiest hint!!

Have you ever wanted to know how many ohms your resistor can carry, or maybe its just too complicated, i have the easiest hint to demonstrate the way to determine the value of a resistor by just calculating the color codes in each resistor!!! http://www.learnabout-electronics.org/resistors_06.php

Step 1 First of all to know the value of a resistor you must identify the color in each resistor

1.To identify each color in a resistor you must first memorize the color codes
Some resistors have 4band color codes and some resistors have 5 band color codes and some 6
Here are some examples.
Memorize them for the mean time,because you are about to calculate the color codes on step 3

Comments

[J-Five]

On a Commodore 64 simulator, and I wrote reading resistor program.
First it asks if it’s a 4 or 5 band resistor. It adjusts how many significant bands there are then it as what color each band is (left to right). Then it matches the band color with its value (i.e. blue would be a 6). Make’s note of value and continues with the remaining significant bands, keeping track of the values. Then it will asks what’s the tolerance color and it does the same thing as before matching the colors with the appropriate values. And finally it displays the ideal value, the lowest and then the highest possible values.

[impulse94]

How about some hints for those who are color-blind?

[J-Five]

maybe use an electronic meter or something similar.

[seandogue]

Truth is, you're kinda screwed, unless you've learned to compensate for Red/Grn or which ever of the three varieties form which you suffer. For installed resistors (debugging an existing circuit) maybe and In situ Ohm meter, (those in circuit test tools that don't require desolder) or desolder one lead and test using DMM would be the only alternative I think, unless you have a second set of eyes... For design and fab, I'd be inclined to buy in bulk and store in clearly labeled bins.

[zerofreak]

ummm.... probably there is one way, but iam not sure about it. Maybe you can try to read the color band before the tolerance color and then count the number of zeros, if zeros are two it mean the resistor's value is measure in kilo ohms, if the number of zeros is one, them the resistor's value is measured in ohms. Hope this helps, but in case you can try to calculate the value of resistor using the resistor calculator

[trike road poet]

An 'old' (WW2) Army electronic tech Mnemonic device to remember the colors is:

Bad Boys Ravage Our Young Girls Behind Victory Garden Walls

                  silver  0.01(x)
                  gold   0.1(x)
Black = 0    or    1.0(x)
Brown = 1   or    10.0(x)
Red = 2       or    100.0(x)
Orange = 3 or    1000.(x)
Yellow = 4   or    10,000.(x)
Green = 5   or     100,000(x)
Blue = 6      or     1,000,0000.(x)
Violet = 7    or     10,000,000.0 (x)
Grey = 8
White = 9


And Yes, I had to ask Granddad what a 'Victory Garden' was!

[jufreese]

Black boys rape our young girls, but violet goes willingly

[bumsugger]

I was (always) taught that; BLACK B*******S RAPE OUR YOUNG GIRLS BUT VIRGINS GO WITHOUT.

[HARSHAD BHATT]

OUR PROFFESOR IN ENGINEERING COLLEGE TAUGHT US TO REMEMBER THE COLOR CODES AND EVEN AFTER 38YEARS OF MY COLLEGE, I HAVE NOT FORGOTTEN HOW TO READ THE COLOR CODES!!! HERE IT GOES Buy British Rubber Orelse Your Girlfriends Blooming Virginity Goes Waste. BLACK,BROWN, RED, ORANGE,YELLOW,GREEN,BLUE,VIOLET, GOLD, WHITE. Now you will never forget it.

[Kwitmeh3]

Bad Beer Rots Our Young Guts But Vodka Goes Well

[osgeld]

OK THANKS!

[zerofreak]

how about this:- Big Buddy Randy Orders Your Goodies By Very Generous Way BLACK, BROWN, RED, ORANGE, YELLOW, GREEN, BLUE, VIOLET, GOLD, WHITE for sure you won't forget this!!

[zerofreak]

cool guys, hope you liked my instructables, its my first one

[RAM]

Another one! "BB Roy Of Great Britain Had A Very Good Wife" BLACK,BROWN, RED, ORANGE,YELLOW,GREEN,BLUE,VIOLET, GOLD, WHITE.

[lemonie]

A bit too much of this is copied from elsewhere, and things like this:
http://www.mistap.com/resistor/
-will calculate things for you.
Still the explanation is good, but why not consider the tolerances?

L

[zerofreak]

well, i never consider the tolerances because in every resistor the tolerance only shows the estimation between the number of ohms to be divided by its percentage. Like if we have 3000 ohms resistor and the tolerance is 10 %, the resistor's value may become 2995 or 3005 ohms because we calculate it with the percentage given in its own tolerance. So its kinda 45% useful to read the tolerance. Hope this helps.

[lemonie]

10% of 3K is +/-300 ohms, so the "3K" resistor is between 2.7 and 3.3K. It can make a difference, it may be worth commenting on. L

[zerofreak]

yh, it could make a difference, but not a big difference.... if you estimate 2700 from hundreds you could get 3000 automatically, i mean like tolerance is not big deal only 10 % could be probably be the highest tolerance of all resistors, no one knows what will be the 20 %

[lemonie]

Even if it doesn't make a difference, because you mention tolerances it would be good to add your opinion on them?

L

[zerofreak]

ok, but next time, i already gave the tolerance color code, i only want to upload an instructable, thats all, and help people too