Color ring resistance calculator, five-color ring resistance reading method, 5-ring resistance identification method
Pronunciation:
Example: 5-ring resistance in order: red, yellow, red, black, gold, read as 242Ω
The error is ±0.5%
Example: 5-ring resistance in order: orange white yellow red silver read as 39400Ω = 39.4K
The error is ±10%
Example: 5-ring resistance In order: orange, orange, red, gold, red, orange, red, red, 332, Ω, multiplied by 0.1=33.2 Ω
The error is ±2%
From the above, it is known that reading the fourth color circle is gold or silver, because it is a negative multiplication.
About the error rate:
The software error rate must be multiplied by 100. If the calculated error is 0.02, multiply by 100=2%.
The resistance is generally divided into: carbon film resistance, metal film resistance, cement resistance, wire resistance and the like.
General household appliances use more carbon film resistors because of their lower cost.
Metal film resistors have higher precision and are used on more demanding equipment.
Cement resistors and wire friction resistors are able to withstand relatively high power.
The accuracy of the line friction resistor is also relatively high, and it is often used on highly demanding measuring instruments.
Low-power carbon film and metal film resistors generally use a color ring to indicate the resistance value. The unit of resistance is ohms.
The color ring resistance is divided into four color rings and five color rings, first speaking four color rings.
Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Purple 7 Gray 8 White 9 Gold, silver indicates error
The color circles represent the following meanings:
The first color circle: the first digit of the resistance value;
The second color circle: the second digit of the resistance value;
The third color circle: a power of 10;
The fourth color circle: the error is expressed.
For example: resistance color ring: brown green red gold first place: 1; second place: 5; 10 power is 2 (ie 100); error is 5% ie resistance value: \ (15X100=1500 ohms = 1.5 Thousand ohms = 1.5K\)
The more accurate "five-color ring" resistor, with five color rings to indicate the resistance of the resistor, as follows:
The first color circle: the first digit of the resistance value;
The second color circle: the second digit of the resistance value;
The third color circle: the third unnumbered value of the resistance;
The fourth color circle: the power of 10 of the resistance multiplier;
Fifth color circle: error (commonly brown, error is 1%)
The four-color ring resistance error is 5-10%, the five-color ring is often 1%, and the accuracy is improved.
For example: there is resistance: yellow purple red brown The first three digits are: 472 The fourth digit represents the third power of 10, that is, the 1000 resistance is: \(472X1000 ohms = 472 kilo ohms (ie 472K))
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