Site hosted by Angelfire.com: Build your free website today!

Winchmore School Design and Technology

Electronic Products 

 

Resistor Colour code and calculator

Example shown

First band Brown = 1

Second band black = 0

Third band red = two zeros

Forth band gold = 5% tolerance

Value of resistor = 1000 ohms (1Kohms )

 

1st Colour band

1st Digit
2nd Colour band

2nd Digit
3rd Colour band

Number of Zeros
4th Colour band

Tolerance

Black
0
0
none

Gold 5%

Brown
1
1
One zero

Silver 10%

Red
2
2
Two zeros

Orange
3
3
Three Zeros

Yellow
4
4
Four zeros

Green
5
5
Five zeros

Blue
6
6
Six zeros

Violet
7
7
Seven zeros

Grey
8
8

White
9
9

If you find it hard to work out the codes with a table use the Resitor Calculator below to help you.

It is useful for checking you have used the above table correctly but you can't take a computer into your exam ! You will need to learn how to use a table.

To Calculate Resistor Values from Colour Codes Select colours from the pull down menus.

 

    

 

 

Welcome Page
Useful Links
New building 2001

Graphical resistance calculator

Winchmore school site