Identification Method For Color Ring Resistance Of Resistors

The first and second rings with four color rings represent the first two digits of the resistance value, respectively; The third ring represents the magnification; The fourth ring represents error. The key to rapid recognition is to determine the resistance value within a certain order of magnitude range based on the color of the third ring, such as a few points or tens of K, and then substitute the number read from the first two rings, so that the number can be quickly read.
(1) Remember the number represented by each color of the first and second rings. Can be remembered as follows: Brown 1, Red 2, Orange 3, Yellow 4, Green 5, Blue 6, Purple 7, Grey 8, White 9, Black 0. Read together in this way and repeat it multiple times to remember.
The key to quick recognition is to accurately remember the resistance range represented by the color of the third ring. Specifically:
Gold: what time and Ω
Black: several tens of Ω
Brown: hundreds and tens of Ω
Red: what time and k Ω
Orange: several tens of k Ω
Yellow: hundreds and tens of k Ω
Green: What time and M Ω
Blue: several tens of M Ω
From the perspective of order of magnitude, they can be divided into three major levels on the body, namely: gold, black, and brown are on the ohmic scale; Red orange 'and yellow are in the thousand euro level; Green and blue are in the megaohm range. This division is for the convenience of memory.
(3) When the second ring is black, the color of the third ring represents integers, such as a few, tens, hundreds of k Ω, etc. This is a special case when reading and should be noted. For example, if the third ring is red, its resistance value is the entire number of k Ω.
(4) Remember the error represented by the fourth ring color, that is, gold is 5%; Silver is 10%; Colorless is 20%.
Here are some examples to illustrate:
Example 1: When the four color rings are yellow, orange, red, and gold in sequence, and because the third ring is red and the resistance range is a few k Ω, substituting the numbers "4" and "3" represented by yellow and orange respectively, the reading is 4.3 k Ω. The gold ring represents an error of 5%.
Example 2: When the four color rings are brown, black, orange, and gold in sequence, since the third ring is orange and the second ring is black, the resistance value should be several tens of k Ω. Substitute the number "1" represented by brown, and the reading should be 10 k Ω. The fourth ring is golden, with an error of 5%.