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Basic knowledge of electronic components

2024-07-04

The most basic function of electronic components is to hinder the flow of current. The two most basic parameters for measuring resistors are resistance and power. Resistance is used to indicate the magnitude of the resistance to current, expressed in ohms. In addition to the basic units, there are also kilo-ohms and megohms. Power is used to indicate the maximum current that a resistor can withstand, expressed in watts, and there are 1/16W, 1/8W, 1/4W, 1/2W, 1W, 2W, etc. If this maximum value is exceeded, the resistor will burn out. Depending on the materials used to make resistors, there are cement resistors (low production cost, high power, high thermal noise, insufficient resistance, unstable operation), carbon film resistors, metal film resistors (small size, stable operation, low noise, high precision) and metal oxide film resistors, etc. Depending on whether the resistance value is variable, it can be divided into fine-tuning resistors, adjustable resistors, potentiometers, etc.

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