The resistance is represented by "R" in the circuit, such as: R1 represents a resistance number 1. The main role of resistance in the circuit is

　　Diversion, current limit, pressure, bias, etc.

　　1. Parameter recognition: The unit of the resistance is Om (ω), the multiplier unit is: thousands of Euros (KΩ), Mago (MΩ), etc. Convert

　　The method is: 1 trillion Euros = 1000,000 Euros = 1000000 Euros

　　There are three types of parameter marking methods of the resistance, namely the direct marking method, the color standard method and the number of the number.

　　A. The number of bidding methods is mainly used for small -volume circuits such as patch, such as:

　　472 represents 47 × 100Ω (ie 4.7K); 104 means 100K

　　B. The color ring labeling method is used most most.

　　Four -color ring resistance five -color ring resistance (precision resistance)

　　2. The relationship between the position and magnification of the resistance of the resistor is shown in the table below:

　　Color valid digital multiplier allowable deviation (%)

　　Silver / x0.01 ± 10 10

　　Gold / X0.1 ± 5

　　Black 0 +0 /

　　Brown 1 x10 ± 1

　　Red 2 x100 ± 2

　　Orange 3 x1000 /

　　Yellow 4 x10000 /

　　Green 5 x100000 ± 0.5

　　Blue 6 x1000000 ± 0.2

　　Purple 7 x10000000 ± 0.1

　　Gray 8 x100000000 /

　　White 9 x1000000000 /