What does the resistor's color code mean?
The resistor's color code indicates the electronic resistor value. Manufacturers invented the universal electronic color codes in the early twentieth century, because the colors were much easier to read on a small resistor than a small print and were also cheaper to produce. Each color represents a different evaluation and reading of the color code of the resistance from left to right can determine the exact value of any resistor. Resistors are always evaluated in ohms and can have anywhere from two to five color belts. The most common are three or four belts. This group gives the resistor tolerance. Tolerance indicates the range of variations between the actual resistor value and its design specifications. If there is no silver or gold group, the band closest to one of the leads will be the coat of the band tolerance +/- 5%and the silver strip represents a tolerance of +/- 10%. If no tolerance belt is present, tolerance is +/- 20%. There are some resistors with smaller tolerances but gold and silvero are the most common colors of tolerance.
The first two color bands on the resistor are its two -digit number, called significant numbers, and the third band is a multiplier. The multiplier says which strength of the first two numbers should be multiplied. The fourth group shows tolerance. For example, if the resistor has colored yellow, purple, red and gold, as one reads from left to right, the first number will be 4, the second number will be 7, the multiplier will be 100 and the fourth gold belt means that the tolerance will be +/- 5%. In other words, the color code of the resistor shows that the component will have an rating of 4 700 ohms and with a tolerance of +/- 5% the actual value can be anywhere from 4,465 ohms to 4,935 ohms.
Colors in the color code of the resistor are arranged in the same order as in the color spectrum, with black left and white on the right side. These values are recognized at international level. Charts showing noThe numbers and multipliers represented by each color are available online.