In actual electronic work, how to quickly find the resistance value of the resistor you want can improve work efficiency, which is also a basic skill, but it must be mastered quickly. Color ring resistors are divided into five rings and four rings. There are four colors for the four ring resistors, and the five colors marked on the resistor body are the five ring resistors. Now let's let you know how to read the five ring resistors. First of all, we need to know which is the first digit. Let’s look at the picture below. There are five colors, so it is the fifth ring.
We need to read according to the table of the five rings, and then we need to know which is the first color ring. Let’s see The next difference is that the distance between the four colors on one side is close, and the other color ring is farther away, so we know from left to right that the first color ring is yellow, followed by purple, black, orange, and brown. So yellow is 4 in the first ring, purple in the second ring is 7, black in the third ring is 0, the fourth ring is the product of 10 to the third power, which is 1000, and the fifth ring is the error of brown is ±1%.
Now let's calculate the resistance value 470*1000=470K, and then the error is ±1%, so the resistance value range is normal between 465.3K-474.7K. Now let's let you know how to read the resistance of the fourth ring. After understanding the operation of the fifth ring, the operation of the fourth ring is relatively simple.
First of all, the miniature relay
difference between the fourth ring and the fifth ring is that one less ring is valid mathematics. , the other readings are similar, just follow the table above. We know that the first color is red, followed by red, black, and orange. So red is 2 in the first ring, red in the second ring is 2, black in the third ring is the product of 10 to the 0th power, which is 1, and the fifth ring is the error gold is ±5%, now let's calculate the resistance What is the value of 22*1=22 ohms, and then the error is ±5%, so the resistance value range is between 20.9R and 23.1R, which are normal.