Thursday 20 October 2011

Decoding Resistor Color Codes


Resistor: What actually did you mean by the resistor? (Resistor are the electronics component which are used to resist the flow of current or voltage in an electrical circuits.)
They are used in every electronics circuit.

So every resistor has its own value, printed in the form of color on it. Every color indicate one value and we have to decode it. In this post i am going to show you how to decode the resistor color code.

The image given below is of resistor, u can note the color on it.
This color are nothing but its resistance, this color will help to calculate the resistance.


Figure 1


Resistor

Table 1 Resistor Color Coding
                         

Color
1st Digit
2nd Digit
Multiplier
Tolerance
Black
0
0
1
+20%
Brown
1
1
10
+1%
Red
2
2
100
+2%
Orange
3
3
1,000
+3%
Yellow
4
4
10,000
+4%
Green
5
5
100,000
n/a
Blue
6
6
1,000,000
n/a
Violet
7
7
10,000,000
n/a
Gray
8
8
100,000,000
n/a
White
9
9
n/a
n/a
Gold


0.1
+5%
Silver


0.01
+10%


Referring to Table 1 and Figure 1, 
                Red represents 2 and Blue stands for 6, so the significant digits of a resistor with a Red-Blue-Green-Gold band scheme are 26. The third band indicates the multiplier, in this example that band is Green, so the value is 100,000. Multiply 26 by 100,000 and you get 2600000 ohms. You express values over 1000 ohms as 1 K-ohms and 1000 K-ohms as 1 M-ohms, so you say that the above resistor has a value of 2.6M-ohm.
And at last the Gold color indicate tolerance rate (for example, +5-percent tolerance means the resistor value may vary plus or minus 5 percent from the stated value).

Convertion Table:

1] 1 Mega ohms = 1000 Kilo ohms.
2] 1 Kilo ohms   = 1000 Ohms.

Any doubt about this topic, please post a comment.
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1 comment:

  1. Very informative information about resistor color codes. It seems difficult to learn at first, but over time I found it gets much easier to understand.

    ReplyDelete

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