WRE-330 WRE-331 WRE-332 WRE-333 WRE-340 assembly thermocouple, there are many types of resistors, usually divided into carbon film resistors, metal resistors, wire-wound resistors, etc .: It also includes fixed resistors and variable resistors, photoresistors, varistors, thermistors, etc. But no matter what kind of resistor, it has a basic representation letter "R".
The resistors commonly used in electronic circuits are fixed resistors and potentiometers, which are fixed according to different materials and processes.
Type resistors can be divided into: film type resistors (carbon film RT, metal film RJ, synthetic film RH and oxide film RY), solid core electric
Resistance (organic RS and inorganic RN), metal wire wound resistance (RX), special resistance (MG type photoresistor, MF type thermal resistance
Thermistor) four kinds.
Carbon film resistance. Gaseous hydrocarbons decompose at high temperature and vacuum. Carbon is deposited on porcelain rods or tubes to form a layer of crystalline carbon film. By changing the thickness of the carbon film and changing the length of the carbon film by using a groove method, different resistance values can be obtained. Carbon film resistors have lower cost, average performance, lower accuracy but good thermal stability. Its characteristics: good stability, small negative temperature coefficient, good high frequency characteristics, less affected by voltage and frequency, small noise electromotive force, stable pulse load, wide range of resistance values, etc.