Correct understanding of the resistance, resistance and resistance in metal keyboard.
Resistance is an indispensable electronic component in the circuit board of metal keyboard. It is not only widely used, but also frequently used in the metal keyboard. Here is a brief introduction to the resistance used in the metal keyboard.
1. The role of resistance.
Resistance is defined as the use of resistance characteristics of metal or non-metallic materials made of electronic components easy to use and install. It is generally represented by R. The function is to block the current. The functions of metal keyboard can be summarized as reducing voltage, distributing voltage, limiting circuit current and providing necessary working conditions (voltage and current) for various electronic components.
2. Resistance and classification
Resistor can be classified according to its structure, generally divided into fixed resistor and semi adjustable resistor. Metal keyboard contains these two kinds of resistance, the use of a relatively large number of fixed resistances, and its resistance value will also be marked on the resistance.
3. Calculation of resistance value
Fixed resistor can be seen by looking at the number of resistance value; in addition, we need to observe the color calculation to get.