The resistor has four functions, namely voltage divider, shunt, impedance matching and filtering. There are many types of resistors. We usually have fixed resistors, variable resistors, special resistors, RT-type carbon film resistors, RJ-type metal film resistors, RX-type wirewound resistors, chip resistors, high-power resistors, and low-power resistors. So how many types of resistors are used in our production?

 
First, the resistor has a shunt function and is often used in a variety of circuits for the distribution of current, this application is widely used, can be seen in many products.
Second, the resistance should be used for the volume adjustment circuit of the radio and amplifier, the bias circuit of the semiconductor tube operating point and the step-down circuit. On the line of the USB to serial port, the two resistors are often used to obtain a 3.3V or 2.8V serial port.
Third, with the function of resistance filtering, so the resistor is often used in the integration circuit, differential circuit, decoupling circuit, timing circuit, etc.
Fourth, the resistance of the resistor is often used in the transmission line, and the figure of the resistor can be seen in many products of the transmission line in life.
5. Thermistors can be used as thermal sensors, which are often seen on our water heater products.
Sixth, the photoresistor can be used as an optical switch product, such as some induction lamps in our lives. 

 
Resistor is used as a basic component in various electronic products. The above six points are that we summarize some common resistors applied to life. With the advancement of technology, resistance is also moving forward, and it is constantly refined, miniaturized, and performance. Will be higher and the price will be lower. In medical treatment, resistance has also developed very rapidly. At present, many smart medical devices can enter human blood vessels for treatment, and electrical resistance also plays an important role in this process.