How is the adjustable resistor specifically wired?
There are two ways to connect: variable resistance and voltage regulation.
The former is a fixed point connected to 0 bit, and the other fixed point is connected to the voltage, so that the adjustable voltage can be output between the fixed position of the 0 bit and the movable head;
The latter is a fixed point and shorted to the active head, so that the two fixed points become a changeable resistance.
How to connect the three pins of the adjustable resistor?
The pins on both sides are fixed resistance. The middle of the resistor is the sliding contact, so it can be changed between 0K-nK and can be accessed according to the requirements of the circuit.
The three-legged adjustable resistor is the two ends of the resistor. The middle one is the active connection. The two feet on both sides are the value of the whole resistor. The resistance of the middle leg and either leg depends on the rotation. Depending on the angle. If there is a 50K potentiometer, measure the two feet on both sides, the resistance value is 50K, measure the resistance value of the middle leg and either side of the foot, it depends on the position of the handle, such as the middle position, then the middle foot and any One foot is 25K, and the resistance will change if you continue to rotate. If it becomes smaller, the other side will become larger.
Potentiometer connection
The potentiometer has 3 feet, 1 pin is grounded, 2 pins are connected to the output, and 3 pins are connected to the signal input! 1 foot 3 feet can be distinguished! !
The general potentiometer, the middle is the moving piece, so if you measure the resistance, connect the 1 and 3 feet, measure the total resistance, the moving piece will not move, the resistance will not change;
Connected 1, 2, the resistance will become larger from the clockwise direction (moving the film);
2, 3 is the opposite!
Double potentiometer connection
6 feet are called double potentiometers, that is, 2 single units are together!
8-pin potentiometer
The 8-pin potentiometer should be equipped with a switch, which is generally used in car audio.