The manufacturer of toggle switch introduced the function of adjustable resistor


The resistance is divided into variable resistance, fixed resistance, special resistance, RJ type metal film resistance, RT type carbon film resistance, sheet resistance, RX type winding resistance, high-power resistance and low-power resistance. The toggle switch manufacturer introduces the functions of adjustable resistance.


1. Shunt

When a resistor and another component such as a bulb are in parallel in the circuit, the voltage at both ends of the resistor and the voltage at both ends of the bulb are the same, and the sum of the current flowing through the resistor and the current flowing through the bulb is equal to the total current flowing through the resistor and the bulb. Therefore, the resistance will have the effect of shunt.

2. Partial pressure

When a resistor and another component such as a bulb are in series in the circuit, the current flowing through the resistor and the bulb is the same, and the sum of the resistance and the respective voltage of the bulb is equal to the total voltage at both ends of the resistor and the bulb as a whole. Therefore, the resistance will play the role of partial voltage.

3. Special resistance

Special resistance is made of semiconductor materials, and its resistance value can also be changed, but unlike variable resistance, the resistance value of variable resistance can be adjusted manually, while the resistance value of special resistance depends on external environmental factors. For example, the resistance value of the thermistor decreases with the increase of temperature. When applied in the circuit, the temperature can be judged according to its resistance value and used as a thermal sensor; The resistance of photosensitive resistor is greatly reduced when there is light, and can be used as optical switch in the circuit; The resistance of the varistor changes with the voltage at both ends of the varistor, which can play a protective role in the circuit. The circuit should not be damaged due to the fluctuation of voltage. Another kind of the most special resistance is the superconductor element. It does not generate heat when conducting electricity. When making computer elements, it does not need cooling system, which can greatly reduce the volume and energy consumption of the computer.

4. Variable resistor

Variable resistor, also known as potentiometer, refers to the resistance whose value can change. This variability determines the value of its existence. For example, in the analog circuit of some instruments and meters, sometimes there are some uncertain elements. At this time, the variability of the potentiometer is needed to adjust it to the best condition.