Resistor color code marking how to recognize

Resistor color code identification method

With four color rings in which the first two rings represent the first two digits of the resistance value; the third ring represents the multiplier; the fourth ring represents the error. The key to rapid identification is to determine the resistance value in a certain order of magnitude range according to the color of the third ring, for example, a few points several K, or tens of several K, and then the first two rings read out the number of "generation" into it, so that you can quickly read out the number.

(1) Memorize the number of each color represented by the first and second rings. This can be remembered as follows: brown 1, red 2, orange 3, yellow 4, green 5, blue 6, purple 7, gray 8, white 9, black 0. This is read together, and can be memorized by repeating it a few times.

Remembering the range of resistance values represented by the third ring of colors is the key to fast knowledge. Specifically:

Gold: a few points of a few Ω

Black: a few dozen Ω

Brown: hundreds of dozens of Ω

Red: a few points of a few kΩ

Orange: a few dozens of kΩ

Yellow: a few dozens of kΩ

Green: a few points of a few MΩ

Blue: dozens of dozens of MΩ

From the order of magnitude, in the body can be divided into three large classes, namely: gold, black, brown is the ohm level; red-orange ', yellow is the kilo-ohm level; green, blue is the megohm level. It's divided up this way to make it easier to remember.

(3) When the second ring is black, the third ring color represented by the integer, that is, a few, dozens, hundreds of kΩ, etc., which is a special case of reading, pay attention to. For example, if the third ring is red, the resistance value is a few kΩ.

(4) Remember the error represented by the fourth ring color, i.e.: gold for 5%; silver for 10%; colorless for 20%.

Example: when the four color ring is yellow, orange, red, gold, because the third ring for the red, resistance range is a few points a few kΩ, according to the yellow, orange and two colors represented by the number of "4 ″ and "3 ″ instead of, it reads 4.3 kΩ. The first ring of gold is the error of 5%.