Common resistors

1. Potentiometer
A potentiometer is an electromechanical component that relies on the sliding of a brush on a resistor to obtain an output voltage that is proportional to the displacement of the brush.
1.1 Synthetic carbon film potentiometer
The resistor is made by coating materials such as ground carbon black, graphite, quartz, etc. on the surface of the substrate. This process is simple and is currently the most widely used potentiometer. The characteristic is high resolution, good wear resistance, and long service life. The disadvantages are current noise, high nonlinearity, poor moisture resistance, and resistance stability.
1.2 Organic solid potentiometer
Organic solid potentiometer is a new type of potentiometer that uses a heating and pressing method to press organic resistance powder into the groove of an insulator. Compared with carbon film potentiometers, organic solid potentiometers have the advantages of good heat resistance, high power, high reliability, and good wear resistance. But the temperature coefficient is high, dynamic noise is high, moisture resistance is poor, manufacturing process is complex, and resistance accuracy is poor. Used for regulating voltage and current in miniaturized, highly reliable, and wear-resistant electronic devices, as well as AC and DC circuits.
1.3 Metal glass uranium potentiometer
By using screen printing method, metal glass uranium resistance slurry is coated on a ceramic substrate according to a certain pattern, and then sintered at high temperature. The characteristics are: wide resistance range, good heat resistance, strong overload capacity, good moisture resistance, wear resistance, etc. It is a promising potentiometer variety, but the disadvantage is high contact resistance and current noise.
1.4 Wire winding potentiometer
A wire wound potentiometer is made by using copper wire or nickel chromium alloy wire as a resistor and winding it around an insulating framework. The characteristics of wire wound potentiometers are small contact resistance, high accuracy, and low temperature coefficient. However, their disadvantages are poor resolution, low resistance, and poor high-frequency characteristics. It is mainly used as voltage divider, rheostat, instrument middle note zero and working point, etc.
1.5 Metal film potentiometer
The resistance body of a metal film potentiometer can be composed of alloy film, metal oxide film, metal foil, etc. The characteristics are high resolution, high temperature resistance, low temperature coefficient, low dynamic noise, and good smoothness.
1.6 Conductive plastic potentiometer
A special process is used to cover the DAP (Dipropylene Phthalate) resistance slurry on the insulation body, heat and polymerize it into a resistance film, or thermoplastic press the DAP resistance powder into the groove of the insulation matrix to form a solid body as the resistance body. The characteristics are: good smoothness, excellent resolution, good wear resistance, long service life, low dynamic noise, high reliability, and chemical corrosion resistance. Servo systems used for space devices, missiles, aircraft radar antennas, etc.
1.7 Potentiometer with switch
There are rotary switch potentiometers, push-pull switch potentiometers, and push-pull switch potentiometers
1.8 Pre adjustable potentiometer
Pre adjustable potentiometers are used in circuits. Once adjusted, the adjustment position is sealed with wax and will not be adjusted under normal circumstances.
1.9 Direct slide potentiometer
Use a direct sliding method to change the resistance value.
1.10 Double connected potentiometer
There are two types of potentiometers: heteroaxial double connected potentiometers and coaxial double connected potentiometers
1.11 Contactless Potentiometer
Contactless potentiometers eliminate mechanical contact, have a long service life, high reliability, and are divided into photoelectric potentiometers, magnetic sensitive potentiometers, etc.