Resistor Color Coding
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This document discusses resistor color coding. It explains that resistors have their resistance value and tolerance indicated by colored bands that are read from left to right. The first band represents the first digit, second band the second digit, third band is the multiplier, and fourth band is the tolerance. Examples are provided of calculating the resistance value and tolerance range of sample resistors based on their color bands. In conclusion, using the color band system allows easy identification of a resistor's resistance value.
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- 3. Saudi Aramco: Company General Use Review: What is a Resistor? Resistors circuit component that resist (limits) the flow of electrons in an electrical circuit.
- 4. Saudi Aramco: Company General Use Resistor Color Codes Resistors have their resistance value and tolerance shown by colored bands. Read the resistor bands from the left-hand side. 1st band is the one closest to one of the ends. 4th band will have either gold, silver, or no color.
- 5. Saudi Aramco: Company General Use Resistor Color Codes 1st band = 1st significant digit 2nd band = 2nd significant digit 3rd band = multiplier 4th band = tolerance
- 6. Saudi Aramco: Company General Use Resistor Color Codes Bright Boys Rise Over Your Grades By Very Good Work
- 7. Saudi Aramco: Company General Use Resistor Color Codes Question: Why do we use color coding in a resistor? Ans.: For easier identification.
- 8. Saudi Aramco: Company General Use Resistor Color Codes 1st band: orange 3 2nd band: white 9 3rd band: yellow 10,000 4th band: silver +/- 10% Therefore: 39 x 10,000 = 39,000 39 kilo ohms +/- 10% 1st band: red 2 2nd band: green 5 3rd band: black 1 4th band: silver +/- 10% Therefore: 25 x 1 = 39,000 25 ohms +/- 10%
- 9. Saudi Aramco: Company General Use Group Work
- 10. Saudi Aramco: Company General Use Tolerance From the resistor value: 39 k +/- 10% The tolerance limits the resistance to: Minimum value: 39 k - 10% = 35.1 k Maximum value: 39 k + 10% = 42.9 k From the resistor value: 25 +/- 10% The tolerance limits the resistance to: Minimum value: 25 - 10% = 22.5 Maximum value: 25 + 10% = 27.5
- 11. Saudi Aramco: Company General Use Tolerance Question: Why does a resistor have tolerance? Ans.: There is no perfect resistor with an exact value. Resistors are manufactured in approximate values.
- 12. Saudi Aramco: Company General Use Review & Conclusion Review Calculate the resistance of the sample resistors. Conclusion You can calculate the resistance in a resistor just by using the color bands.
- 13. Saudi Aramco: Company General Use Question and Answer
- 14. Saudi Aramco: Company General Use Next Topic Resistor Heat Dissipation
- 15. Saudi Aramco: Company General Use Thank You