The resistor is represented by a "R" plus a number in the circuit. For example, R1 represents a resistor numbered 1. The main role of the resistor in the circuit is shunt, current limit, voltage division, offset, and so on.

1, parameter identification: the unit of resistance is ohm (Ω), the unit of magnification is: thousand ohms

(KΩ), megohm (MΩ), etc. Conversion

The method is: 1 megohm = 1000 kohm = 1000000 euro

There are three kinds of parameter labeling methods for resistance, namely, direct label method, color scale method and number label method.

a, the number standard method is mainly used for small-volume circuits such as patches, such as: 472 means 47 × 100 Ω (ie 4.7K); 104 means 100K

b, color ring labeling method is the most used, the current examples are as follows: four color ring resistance five color ring resistance (precision resistance)

2. The relationship between the color mark position and the magnification of the resistor is shown in the following table:

Color effective digital magnification tolerance (%)

From the thinner section of the resistor

Silver / x0.01 ± 10

Gold/x0.1±5

Black 0+0/

Brown 1x10±1

Red 2x100±2

Orange 3x1000/

Yellow 4x10000/

Green 5x100000±0.5

Blue 6x1000000±0.2

Purple 7x10000000±0.1

Gray 8x100000000/

White 9x1000000000/