How to check the resistance value of color ring resistor

How to read the resistance value of the color ring resistor? The first two color circles represent the first and second digits. The third color circle represents the multiplication factor of the resistance value. The fourth color ring (optional) represents the tolerance rate. Determine values ​​based on color wheel colors.

Color ring resistor resistance value measurement method

Color ring resistor is a convenient and practical electronic component. Use different colored color rings to represent their resistance values. Knowing how to read the resistance of a color band resistor is critical to electronic circuit design and troubleshooting.

How to read the color ring resistance

The process of reading the color ring resistance value involves four steps:

1. Identification The first and second digit color rings

From left to right, the first two color rings represent the first and second digits of the resistance value.

2. Identify the magnification color ring

The third color ring represents the magnification of the resistance value. It indicates how many times the first two digits should be multiplied.

3. Identify the tolerance color ring (optional)

The fourth color ring represents the tolerance rate of the resistance value. It indicates the allowable deviation that the actual value of the resistor may have from the nominal value.

4. Determine the value based on the color of the color wheel

The color of each color wheel corresponds to a specific value, as shown in the following table:

##Orange3 310005%yellow4410000 10%Green551000005% Blue6610000001%Purple77100000002%grey881000000005%White99100000000010%

Color	First digit	Second digit	Magnification	Tolerance
Black	0	0	1	20%
Brown	1	1	10	1%
Red	2	2	100	2%

Example

Consider a Resistance of the following color wheel:

Yellow: 4
• Purple: 7
• Orange: 1000

Use the color wheel above Value table, we can determine the resistor value as follows:

First digit: 4

Second digit: 7
Multiply: 1000

Therefore, the resistor value = 47 x 1000 = 47000 ohms

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