Kilohm to Ohm Resistors_and Color Ring Resistors Identification Methods

There are many ways to measure resistance resistance, such as the volt-ampere method: also known as the voltmeter and ammeter method, which is a more common method of measuring resistance by utilizing Ohm's law: R=U/I to measure the resistance value. It is called the voltammetric method because it divides the current by the voltage.
However, the color ring resistor identification method can be calculated directly without measurement. The color ring marking is mainly applied on cylindrical resistors, such as: carbon film resistors, metal film resistors, metal oxide film resistors, fuse resistors, wirewound resistors. It refers to the resistor with four color rings or five color rings or six color rings to indicate the resistance value.

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Color Ring Resistors - Introduction to Color Ring Resistors

　Color ring resistors are the most commonly used electronic components in electronic circuits. Color ring resistors are ordinary resistor packages coated with color rings of different colors, which are used to distinguish the resistance value of the resistor. It is used to distinguish the resistance value of the resistor. It ensures that the resistance value can be clearly read when installing the resistor, no matter from what direction it is installed. The basic units of color ring resistors are: ohm (Ω), kilo-ohm (KΩ), megohm (MΩ). 1 megohm (MΩ) = 1000 kilo-ohm (KΩ) = 1,000,000 ohm (Ω).

　　The usual use of color ring resistors can be divided into four-ring and five-ring, usually with four rings. Among the four-ring resistors, the first two rings for the number, the third ring indicates the number of resistance multiplied by the number, the last ring for the error; five-ring resistors, the first three rings for the number, the fourth ring indicates the number of resistance multiplied by the number, the last ring for the error. The error is usually also gold, silver and brown three colors, gold error of 5%, silver error of 10%, brown error of 1%, colorless error of 20%, in addition to the occasional green on behalf of the error, green error of 0.5%. Precision resistors are often used in military, aerospace and other applications. Color ring resistors were used in the earliest days to help people distinguish resistance values because they were larger. In today's highly integrated world, color ring resistors have been used less often.

Four Color Ring Resistors are resistors with four color rings, counting from left to right, the first color ring represents the largest digit of the resistance value; the second color ring represents the second digit of the resistance value; the third color ring represents the number of multiplication of the resistance value; and the fourth color ring represents the permissible deviation of the resistance value (precision).

　　For example, if the first ring of a resistor is red (representing 2), the second ring is purple (representing 7), the third ring is brown (representing 10 times), and the fourth ring is gold (representing ±5%), then the resistance value of this resistor should be 270 Ω, and the error range of the resistance value is ±5%.

　　If the resistor color ring is not good to distinguish that is the first color ring, the easiest way is the "fourth ring" is either gold or silver, and other colors will appear less silver (only useful for four-ring resistor, five-ring resistor does not apply).

　　For example:

　　1, red, yellow, brown, gold 24 * 10 = 240 ohms 5% error

　　2, green, red, yellow, silver 52 * 10,000 = 520K ohms 10% error

Five-color ring resistor is a resistor with five-color color ring to indicate the resistance value, counting from left to right, the first color ring indicates the resistance value of the largest digit; the second color ring indicates the resistance value of the second digit; the third color ring indicates the resistance value of the third digit; the fourth color ring indicates the resistance value of the times the number of multipliers; the fifth color ring indicates the range of error.

　　For example to a five-color ring resistor, the first ring is red (representing 2), the second ring is red (representing 2), the third ring is black (representing 0), the fourth ring is black (representing 1 times), the fifth ring is brown (representing ±1%), then its resistance value is 220Ω&TImes;1=220Ω, and the error range is ±1%.

　　Example:

　　Red, Red, Black, Black, Brown 220*1=220 ohms Error is 1%.

It refers to the resistor with six color rings to indicate the resistance value. The first five color rings of the six-color ring resistor are expressed in the same way as the five-color ring resistor, and the sixth color ring indicates the temperature coefficient of the resistor. It is only used in electronic products with specific requirements, and is generally used very rarely.