View Full Version : Resistor values

John Stevenson
03-26-2005, 07:49 PM
Bought a pack of asorted resistors today.
It says there are some 1K resistors in it but I'm dammed if I can find these given the crap colour code table with them.
These are 4 band ones 1/4W 5%
other values are 10R, 22R, 47R, 100R, 220R, 470R, 1K, 2K2, 4K7, 10K, 22K, 47K, 100K, 220K, 470K, 1MO

Could some kind soul give me the colours of the 1K ones.
I need two for a job tomorrow.


John S.

03-26-2005, 07:54 PM
brown black black orange.



03-26-2005, 08:08 PM
brown black red for 1k.

03-26-2005, 08:17 PM
Do you have a multimeter? Just measure them with that. Dont even need yer reading glasses !

Your Old Dog
03-26-2005, 08:43 PM
brown black red


you can use two - red black reds in parallel if you screw up the other ones!

03-26-2005, 08:44 PM
Just remember this.................









Gives-------gray ----8


First two colors are numbers, third band is the "multiplier" or number of zeros. So it's brown-black-red for 1K.

Learned this when I was 10 years old. Still looking to meet Violet!

Barry Milton

03-26-2005, 08:58 PM
There is a saying that helps you remember the color code.

Bad boys rape our young girls but vilot gives willingly.

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


John Stevenson
03-26-2005, 09:02 PM
Thanks guys,
Got thrown by looking for 4 bands, found them now.

BTW all the Violet'sI have know have had a high resistance http://bbs.homeshopmachinist.net//biggrin.gif

John S.

03-26-2005, 09:05 PM
My high school science teacher taught me that about 10 years ago. He told the class, "Listen up, I'm only saying this once...."

I don't have a need to size resistors very often, so long periods of time go by where I don't think about it at all. But when the time DOES come, I NEVER forget it. It's cool to see many others know it too.


03-26-2005, 09:19 PM
oops. Sorry--didn't mean to give yer a bum steer there. My mistake.


03-26-2005, 09:23 PM
Pretty cool to see we went to different schools together. I learned the same rhyme about thirty-one or so years ago.

David Cofer, Of:
Tunnel Hill, North Georgia

03-26-2005, 09:25 PM
As an EE, this color code was one of the very first things I ever learned, and I have often wondered since why it has not become more commonplace outside the electronics field. I use it whenever possible to mark numbered things that need to be easily identified. Makes a lot of sense to associate a color with a number. How about using a brown wire for your #1 spark plug wire, red for #2 etc.


03-26-2005, 09:40 PM
FYI, the "R" and "K" are decimal point placeholders:

22R = 22.
100R = 100.

4K7 = 4.7 Kohms or 4700
1M0 = 1.0 Megohms

for 1% resistors they would have another significant digit like these:

47R5 = 47.5 ohm

4K75 = 4.75 Kohms or 4750


SMT parts vary but when they're small enough, you don't have to worry about values anymore 'cause they ain't marked http://bbs.homeshopmachinist.net//wink.gif Den

George Seal
03-26-2005, 09:46 PM

Gold=5% tolarance

Silver = 10%

No color = 20%


Remember the early bird gets the worm, BUT it's the second mouse that gets the cheese.

J Tiers
03-26-2005, 11:04 PM
Believe it or not, there is a code on even a 603 sice SMT resistor, at least on ours.

I have not looked at a 402 size.

Its the *&^$$%$#$# capacitors that are unmarked....at any size. The resistors you have a much better chance of measuring with common meters, but they are marked...go figure.

Most DMM capacitance ranges fail at low values.

03-26-2005, 11:14 PM
Personally, I hate the dang color code. Why can't they just mark 'em with numbers like caps? It's hard as heck trying to decode a burned resistor. ALL the colors are BLACK! http://bbs.homeshopmachinist.net//biggrin.gif

03-27-2005, 12:14 AM
My favorite "spoon feed me" electronics site:


His entire site has an amazing amount of info for people like me who missed it the first time around http://bbs.homeshopmachinist.net//smile.gif

03-27-2005, 12:34 AM
I used to install machinery.

In the beginning, I'd purchase all the colors of wire available, Purchase phasing tape of all the colors I could, when I'd hook up 6-10,000 wires I'd use the first phase tape, then wire color code on the terminals strips in sequence.

Rarely would there be a mistake. Equipment would be running and people would be numbering the wires to match the terminal strips. You could look at the main terminal strip and see a error immediately. Maintenance men are the worst wire-swappers I have ever saw. (it's true, you sometimes get what you pay for)

Then I learned to make a set of phones from two recievers, wire the speaker and the earphone in series with a 9 volt battery. If you talk through a wire you know you got the same wire on both ends. I still have a set of phones I carry. No mistakes, right the first time. Just turn it on and it works. Check out time amounts to correcting rotations and watching it run.

Of course if you guys learned the same rhyme I did, you probably already know this.

David Cofer, Of:
Tunnel Hill, North Georgia