The color ring resistance is a color ring coated on the resistance package (that is, the resistance surface) to represent the resistance value of this resistance. The color ring is actually an early standard set to help people distinguish different resistance values. Color ring resistance is still widely used, such as household appliances, electronic instruments, electronic equipment can often be seen. However, because of the large resistance of the color ring, it is not suitable for the performance requirements of modern high integration.
Black, brown, red, orange, yellow, green, blue, purple, grey, white, gold, Silver
0,1,.2,.3,4,.5,6,.7,8,.9,. +5,+10%
The penultimate ring represents the number of zeros. The last bit represents the error.
This rule has a well-remembered formula, similar to rainbow seven colors, black is 0, Brown is 1, red, orange, yellow, green, blue, purple, grey and white correspond to 2-9, gold and silver correspond to 5% or 10% error.
For example, red, yellow, brown and gold represent 240 euros.
The color ring resistance is divided into four rings and five rings, usually four rings.
The penultimate loop can be gold (representing *0.1) and silver (representing *0.01), and the last loop error can be colorless (+20%).
Five-ring resistance is precise resistance, the first three rings are numerical value, the last one is error color ring, usually gold, silver and brown. The error of gold is 5%, the error of silver is 10%, the error of Brown is 1%, the error of colorless is 20%, and occasionally the error of green is 0.5%. Precision resistors are usually used in military, aerospace and other fields.