The appearance of the adjustable resistor and the general resistance is very different. The adjustable resistance has some unique features, and the adjustable resistor can be easily identified in the circuit board.
In the first, the material adjustable resistance can be divided into carbon film adjustable resistance and ceramic adjustability;
In the second, the adjustable resistor will have an adjusted rotary opening, and the screwdriver can be changed, and the adjustment of the resistance is performed;
Step 3, the adjustable resistance is much larger than the normal resistance, and the variable resistance in the circuit is relatively small, and the adjustable resistance is found in the circuit board;
Fourth, the adjustable resistor can be seen to see the resistance of his marked, and the resistance is the resistance between the two fixed pins, that is, the maximum value between the fixing pin and the moving pin;
5th, the adjustable resistance has three pins, and these three pins have different, one of which is a moving pin, and the other two is a fixed pin. Two fixed pins are generally used interchangeably, but the cartridge pin and the fixed pin cannot be exchanged;
The variable resistor of the small plastic housing is smaller, a circular structure, and the three pins are downward, and the impedance adjustment is facing up. Some variable resistors for power larger occlusion, the volume is very large, the movable can slide left and right, perform resistance adjustment;
Section 7, the vertical adjustable resistor is mainly used in small signal circuits, the pin is down, vertically mounted on the board, and the adjustment port of the resistance is 90 in the horizontal direction, the pin and resistance plane of the horizontal adjustable resistance. Directly down, flat on the board, adjust the mouthpiece;