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+ | ====== Resistor Color Code ====== | ||

+ | |||

+ | Every resistor has colored bands. Those bands and colors are not random at all, they help to identify the specifications of the resistor. | ||

+ | |||

+ | Here is how you can see the value of a resistor depending on its colored bands. | ||

+ | |||

+ | Every color represents a different number. | ||

+ | |||

+ | Here is the table of all the colors and numbers: | ||

+ | ^ Color ^ Number ^ | ||

+ | |Black | 0 | | ||

+ | |Brown | 1 | | ||

+ | |Red | 2 | | ||

+ | |Orange | 3 | | ||

+ | |Yellow | 4 | | ||

+ | |Green | 5 | | ||

+ | |Blue | 6 | | ||

+ | |Violet | 7 | | ||

+ | |Grey | 8 | | ||

+ | |White | 9 | | ||

+ | |||

+ | |||

+ | Counting from right to left, the second color is the multiplier. Digits of the first colors must be multiplied with the number of this color. | ||

+ | |||

+ | ^Color ^Multiplier ^ | ||

+ | |Black | 1 | | ||

+ | |Brown | 10 | | ||

+ | |Red | 100 | | ||

+ | |Orange | 1000 | | ||

+ | |Yellow | 10000 | | ||

+ | |Green | 100000 | | ||

+ | |Blue | 1000000 | | ||

+ | |Gold | 0.1 | | ||

+ | |Silver | 0.01 | | ||

+ | And the last color is the tolerance. Tolerance is the precision of the resistor and it is a percentage. | ||

+ | ^Color ^Tolerance ^ | ||

+ | |Brown | 1 | | ||

+ | |Red | 2 | | ||

+ | |Gold | 5 | | ||

+ | |Silver | 10 | | ||

+ | |Nothing | 20 | | ||

+ | |||

+ | There are a lot of programs that can calculate the value of a resistor but if you do not have access to the Internet and you need to know a certain value you can use the table from the next figure. | ||

+ | |||

+ | {{ :iot:res:resistor.jpg?300 |}} | ||

+ | |||

+ | ** Examples: ** | ||

+ | |||

+ | 1.Yellow and green represent 4 and respectively 5. They represent the first and second digits, so you will have 45. | ||

+ | The third band is orange. As a multiplier, it is x 1000, so you will calculate 45 x 1000 thus, the resistance is 45,000 Ω. | ||

+ | The forth band, silver, represents the tolerance, so the final expression of the resistance is 45,000 +/- 10%Ω. | ||

+ | {{ :iot:res:resistex.jpg?300 |}} | ||

+ | 2. A resistor colored Orange-Orange-Black-Brown-Violet would be 3.3 k$\Omega$ with a tolerance of +/- 0.1%. | ||

+ | {{ :iot:res:resistor_image.png?300 |}} |