Quick identification of color-coded resistors 1

Currently, both domestically produced and imported televisions and tape recorders widely use color-coded resistors. Their advantage is that during assembly, debugging, and repair, the resistor values can be read at any angle without the need to rotate the components, making them very convenient to use. Past magazines have introduced methods for reading color-coded resistors, but these require conversion, which can be cumbersome. Here, we present a quick method for identifying resistor values.diode

For resistors with four color bands, the first and second bands represent the first two digits of the resistance value, the third band indicates the multiplier, and the fourth band denotes the tolerance. The key to quick identification lies in determining the resistance value within a specific range based on the third band's color—for example, whether it is several kiloohms or several dozen kiloohms. Then, the numbers from the first two bands are "applied" to this range, allowing for rapid reading of the value.

Here are several key points to master this method:diode

(1) Memorize the numbers represented by each color in the first and second bands. You can memorize them this way: brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, gray 8, white 9, black 0. Read them in sequence and repeat several times to commit them to memory. Accurately and firmly memorize the resistance range represented by the third band color, as this is the key to quick recognition. Specifically:  - Gold: several ohms  - Black: several dozen ohms  - Brown: several hundred ohms  - Red: several kiloohms  - Orange: several dozen kiloohms  - Yellow: several hundred kiloohms  - Green: several megaohms  - Blue: several dozen megaohms  From a magnitude perspective, they can be broadly categorized into three levels:  - Gold, black, and brown are in the ohm range;  - Red and orange, as well as yellow, are in the kiloohm range;  - Green and blue are in the megaohm range.  This categorization is for easier memorization.diode