Electronic Components (1): About Resistors

Resistor

Meaning: The part of the circuit that has an impediment to the current and causes energy consumption is called the resistor.

Abbreviations: R (Resistor) and Exclusion RN

In Circuit Symbol: R

Common resistor units: KΩ, MΩ

Unit conversion: 1 megohm = 103 kilohms = 106 euros

Characteristics: The resistance is a linear element, that is, the voltage across the resistor is proportional to the current flowing through the resistor. The current strength through this conductor is inversely proportional to the resistance of the conductor. That is, Ohm's Law: I=U/R.

The role of split, current limiting, partial pressure, bias, filtering (combined with the use of capacitors) and impedance matching.

In the circuit with "R" plus a digital representation, such as: R15 represents the resistor number 15. There are three kinds of parameter annotation methods in the circuit, namely the straight standard method, the color standard method and the number standard method.

a. The straight standard method is to mark the resistor's nominal value directly on the resistor body with numbers and text symbols. The allowable deviation is expressed as a percentage. The non-standard deviation value is ±20%.b. For small-sized circuit such as patch, in Sanwei Digital, the first digit from left to right, the two digits represent valid digits, and the third digit represents the power of 10 or R (R represents 0.) such as: 472 indicates 47×102Ω (ie, 4.7KΩ); 104 indicates 100KΩ,; R22 indicates 0.22Ω, 122=1200Ω=1.2KΩ, 1402=14000Ω=14KΩ, R22=0.22Ω, 50C=324*100=32.4KΩ, 17R8 =17.8Ω, 000=0Ω, 0=0Ω.

c. The color ring labeling method is the most commonly used. An ordinary color ring resistor is represented by 4 rings. A precision resistor is represented by 5 rings. The color ring next to the end of the resistor body is the first ring, and the other end of the resistor body is exposed. The head is the last ring.