Resistance color ring algorithm, how to calculate the color ring resistance calculation formula

The third digit is the number of zeros, 100 means that the resistance is 10 ohms, and 101 means that 10 is followed by a 0, that is, 100 ohms.

For example: 472 means 47 100 (i.e.; 104 means 100k.

Answer addendum: the white words on the chip resistor, such as: 103 472 330 220, etc., the first two digits of the value are significant numbers, and the third digit is multiples, for example: 103 The significant number is 10, 3 is a multiple, and its resistance value is 10 * 103 = 10k

The significant number of 472 is 47, 2 is a multiple, and its resistance is 10 * 102=

Four-digit resistance: the first three digits are significant numbers, the fourth digit is multiples, and the calculation method is the same as above (1001 1002 4705).

Resistors containing letters: R39 3R3 33R30 56R0 10R0, R is the decimal point here, if R is in the first place, remove R, and count it as three places.

The third digit is the number of zeros, 100 means that there is no 0 after 10, the resistance value is 10 euros, and 101 means that a 0 is added after 10, that is, 100 euros.

Example: 472 means 47 100 (i.e.; 104 means 10 10000 = 100k ohms.

There are four color ring resistors and five color ring resistors

Calculation method: color code method: mark the nominal resistance value and allowable deviation on the surface of the resistor with different colored bands or dots. The meaning of each color:

1. The color represents the meaning of resistance: black-0, brown-1, red-2, orange-3, yellow-4, green-5, blue-6, purple-7, gray-8, white-9

2. The color represents the meaning of the multiplier: black-1, brown-10, red-100, orange-1000, yellow-10000, green-100000, blue-1000000, purple-10000000, gray-100000000, white-1000000000, gold and silver.

3. The four-color ring resistance color represents the meaning of error: gold - 5%, silver - 10%.

4. The five-color ring resistor color represents the meaning of error: brown - 1%, red - 2%, green - blue - purple - gray -

Classification method. Color ring resistor is the most commonly used electronic component in electronic circuits, using color ring to represent color and error, which can ensure that the resistor can be easily and clearly seen no matter what direction it is installed. The basic units of color ring resistance are: ohms ( ) kiloohms (k) and megaohms (m).

1000 ohms ( ) = 1 thousand ohms (k), 1000 kohms (k) = 1 trillion ohms (m).

The color ring resistance is represented by the color ring of the resistance and error, the ordinary is a four-color ring, the high-precision is represented by a five-color ring, and there is also a six-color ring (this product is only used for high-tech products and is very expensive).

There are three types of color ring resistors: three-color ring resistors, four-ring resistors, and five-color ring resistors. We need to know the meaning of the color wheel and the color in order to calculate the resistance of the resistor.

The relationship between the value and the color of the color wheel: black = 0;Brown = 1;Red = 2;Orange = 3;Yellow = 4;Green = 5;blue=6;Purple = 7;Grey = 9;White = 9

The relationship between the tolerance of the resistance and the color of the color wheel: brown = 1%; Red = 2;Green=; blue=; Purple =; Grey=; Gold = 5%; Silver = 10%.

Three-color ring resistance calculation method.

The resistance of the three-color ring is relatively old, which is relatively rare, and the tolerance of the three-color ring resistance is 20%.

The color of the first color ring represents ten digits, and the color ring that is relatively close to the side is the first ring, don't make a mistake.

The color of the second color wheel indicates a single digit.

The color of the third color wheel indicates multiples.

For example, if the color of the three color wheels is brown, red, and orange, then its resistance value is 12x10 3=12x1k=12k

Four-color ring resistance calculation method.

Resistance tolerances for four color bands are common, with resistance tolerances of 5% (gold) and 10% (silver).

The color of the first color wheel represents a multiple of ten.

The color of the second color wheel indicates a single digit.

The color of the third color wheel indicates multiples.

The color of the fourth color ring indicates the tolerance of the resistance.

The distance between the fourth ring and the other three is farther away, so you can find the fourth ring first, and the first ring on the other side. For example, red, green, brown, silver, then its tolerance is 10%, and the resistance is 25x10 1=25x10=250.

How to calculate the resistance of the five color rings.

The high-precision resistance is represented by 5 color rings, and the accuracy will be less than 1% and so on

The color of the first color wheel represents a hundredfold.

The color of the second color wheel represents a number of ten digits.

The color of the third color wheel represents a single digit.

The color of the fourth color wheel indicates a multiple.

The color of the fifth color ring is the tolerance of the resistance, the fifth color ring will be farther away than the other four color rings, find the fifth color ring first, and then the first color ring on the other side.

For example, yellow, purple, black, orange, brown, then its tolerance is 1%, and the resistance is 470x10 3=470x1000=470000=470k.

How do you know what the resistance of the color ring resistor is without a multimeter, let's take a look.

Color ring resistors are divided into four-color and five-color rings.

1. Four-color ring: As the name suggests, the four-color ring is to use four colored rings to represent the magnitude of the resistance, and each color represents a different number.

Four-color ring resistance calculation:

Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Purple 7 Gray 8 White 9 Black 0 Gold and silver indicate an error (5% for gold and 10% for silver).

The meaning of each color ring is as follows:

The first color wheel: the first digit of the resistance value;

The second color ring: the second digit of the resistance value;

The third color wheel: power of 10;

The fourth color wheel: error representation.

For example: resistance color wheel: brown-green-red-gold, the first 1;2nd place 5;The third digit 10 is a power of 2 (i.e. 100); The error is 5%; That is, the resistance value is: 15 100 = 1500 ohms = thousand ohms = .

2. Five-color ring resistance calculation:

There are also more accurate "five-color ring" resistors, which use five color rings to represent the resistance value of the resistor, as follows:

The first color wheel: the first digit of the resistance value;

The second color ring: the second digit of the resistance value;

The third color wheel: the third digit of the resistance value;

The fourth color ring: the power of 10 of the resistance multiplier;

The fifth color wheel: error (commonly brown, 1% error).

Some five-color ring resistors have color rings on both ends of the metal cap, and the color ring that is far away from the relatively concentrated four color rings indicates the error, which is the fifth color ring, and the corresponding metal cap on the other end is the first color ring.

Wherein, the resistivity of the resistor is determined by its own properties, L is the length of the resistor, and S is the cross-sectional area of the resistor).

2.Total resistance in a series circuit: r=r1+r2+r3+......rn。

3.Total resistance in parallel circuit: 1 r=1 r1+1 r2+......1/rn。

4.Finding the resistance by electrical power: r=u p; r=p/i²。

Instead of a table, just remember the value corresponding to the color. Brown, red, orange, yellow, green, blue, purple, gray, white, black, the corresponding value is: 1234567890

The first and second rings are numerical values, and the third ring is 10 several times, such as.

The first, second and third rings are red, black and orange respectively, and the telegram value is 20*10 to the 4th power, which is 200,000 ohms. i.e. 200k. The gold and silver colors at the back indicate that the error is %.

What is the negative square of 10.

I can give you a color ring resistance calculator and leave the mailbox.

Update 1:That's because the first 10 is written in the width of the acre, and the 6th power of 10 = 1m

So 10 x 1m = 10m ohm

According to your description of both the color ring of the resistor is green, blue, red, gold, representing 5, 6, 10 to the power of 2 and + 5% of the first 5 characters to be written, 6 x 10 to the power of 2 = 600 and + -5% beam mill? It should be like this The words 5 and 6 are written, and the number 2 to the power represents how many zero resistance color rings are brown, black, blue, gold, and the rubber bucket table 1, 0, 10 to the 6th power and + -5% The answer is 10m ohm + 5%??The word 1 and 0 are written, and the number 6 to the power represents how many zeros there are.

Four-color ring resistance calculation: brown 1 red 2 orange 3 yellow 4 green 5 blue 6 purple 7 gray 8 white 9 black 0 gold and silver represent the error (gold is 5% error, silver is 10% error).

The meaning of each color ring is as follows: the first color circle: the first digit of the resistance value; The second color ring: the second digit of the resistance value; The third color wheel: power of 10; The fourth color wheel: error representation.

For example: resistance color wheel: brown-green-red-gold, the first 1;2nd place 5;The third digit 10 is a power of 2 (i.e. 100); The error is 5%; That is, the resistance value is: 15 100 = 1500 ohms = thousand ohms = .