Introduction: indeed resistance varied, changing, can be divided into a fixed resistor, a variable resistor, specific resistance, RT-type carbon film resistors, RJ type metal film resistors, power resistors, small power resistors, etc., etc., as the resistance Symbol A logo is also unique to each type of resistor. This article will explain the resistor symbol in detail. It is said that the resistance symbol is strong, but this article is also ah~
First, the introduction of resistance
Resistance, the symbol is R, the unit is Ω (ohm), refers to the conductor's resistance to current, is an inherent property of the conductor, and will not disappear due to the disappearance of current, the current disappears only to illustrate the conductor There is no hindrance, but this hindrance has always existed.
Second, the resistance symbol - - fixed resistance
The concept of a fixed resistor is the same as its literal meaning, and refers to a resistor whose resistance is constant, and its literal symbol is R.
There are two kinds of graphic symbols for fixed resistors, as shown in the following figure:
(usually used fixed resistance graphic symbols)
(International recommended fixed resistance graphic symbol)
Third, the resistance symbol - - semi-adjustable resistor
Semi-adjustable resistors, also known as trimmer resistors, can vary continuously over a range of resistance values. Mainly used in circuits that do not require frequent changes in resistance. Its text symbol is R, which is the same as the fixed resistance. 
Graphic symbol for semi-adjustable resistor
Fourth, the resistance symbol - - potentiometer
The potentiometer is an adjustable resistor with the literal symbol RP (P indicates that it is adjustable).
The potentiometer can be used as a three-terminal component or as a two-terminal component. The graphic symbols are as follows:
(three-terminal components, arrows indicate their adjustability)
(two-terminal components, arrows indicate their adjustability)
Five, resistance symbol - - thermistor
The resistance of the thermistor is also variable, but it is controlled by the temperature of the external environment. The symbol of the thermistor is RT (T-Thermistors indicate that the resistance is affected by temperature). The thermistor can be divided into two categories according to the increase or decrease of its resistance with increasing temperature. The text symbols are NTC (N indicates that its resistance increases with temperature) and PTC (P indicates that its resistance value The temperature rises and decreases).
Graphic symbol of the thermistor
Sixth, the resistance symbol - - photoresistor
The photoresistor is similar to the thermistor, but its resistance is affected by the intensity of the light. The letter of the photoresistor is RL (L indicates that its resistance is affected by the light intensity).
Graphic symbol of the photoresistor (two diagonal lines indicate light)
Seven, resistance symbol - - varistor
A varistor is a resistor whose resistance changes with a change in voltage over a range of current and voltage. The word symbol of the varistor is RV (V-Voltage indicates that its resistance is affected by the voltage across the resistor).
Graphical symbol of varistor
Eight, resistance symbol - - humidity sensitive resistor
The humidity sensitive resistor is similar to the temperature-sensitive thermistor, the photoresistor affected by the light intensity, and the varistor affected by the voltage, which is affected by the humidity of the external environment. Its text symbol is RS (S indicates that its resistance is related to humidity).
The graphical symbols of the humidity sensitive resistor are as follows:
(old graphic symbol) (new graphic symbol)
Extended reading
Resistance symbol - - company labeling method
Some manufacturers in China 
Japan Sony Corporation Notation 
Japan Sanyo Company Labeling 
Japan Toshiba Corporation Labeling 
Japan Matsushita company labeling method 
Japan Hitachi Co., Ltd. 
Dutch Philips company labeling method 
Resistance Symbol - - Fixed Resistance Text Symbol Writing Rules
The resistors are various and can be divided into carbon film resistors, metal film resistors, wirewound resistors, etc. according to the manufacturing materials. In order to distinguish each of the different resistors, we use several Latin letters to represent the resistors, such as RJ for metal. Membrane resistance, RT is used to indicate carbon film resistance, RX is used to indicate wirewound resistance, RU is used to indicate silicon carbon film resistance, WX is used to represent wirewound potentiometer, etc. Beginners may feel so many resistors, so many The resistance symbol, if you write it all down, it feels that the whole person is not good~~ Then let Xiaobian tell you that this is actually awkward, and quickly polish your eyes and see with me. Let's go:
The resistance is generally represented by three Latin letters. The first letter indicates the main name. It can be judged whether it is a resistor or a potentiometer. If the first letter is R, it means it is a resistor. If it is W, it means It is a potentiometer; the second letter indicates the conductor material, which is divided into T, J, Y, X, and T indicates that the conductor material is a carbon film, referred to as carbon, and J indicates that the material is a metal film, referred to as gold, Y. It means that the material is metal oxide film, abbreviated as oxygen, X means that the material is wire wound, referred to as line; the third letter can represent the shape and performance of the resistor, etc., there are four kinds of X, J, L, G, wherein X represents resistance The size, referred to as small, J indicates its precision, referred to as fine, L indicates its measurement, referred to as the amount, G indicates its high power, referred to as high. I don't know if you have a rule of wood. The second letter is actually the first letter of each abbreviation. In an instant, there is a feeling of brightness in the wood~~~
In this small series, we explained the resistance symbol in detail. If you want to know more about the resistance of the children's shoes, you can pay attention to the introduction of the resistance of the small series:
There are so many functions of resistance, do you make it (http://)
After reading such a capricious resistance symbol, I believe that children's shoes should have a great interest in resistance. Here are a few articles about resistance that are recommended by Xiaobian. I believe everyone will like it~~
1, the circuit diagram symbol Daquan
2. Method for identifying resistance value
3. Introduction and types of resistors
4. How to measure large value resistors with a multimeter
5, the main parameters of the resistor / resistor
multimeter
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