01 Partial Pressure
Divider voltage is to divide the required voltage through series resistors, and the size is distributed in proportion to the size of the resistors. A plurality of electrical appliances with different rated currents can be connected to the trunk of the circuit at the same time, and a part of the voltage is shared by the voltage division of the series resistor to ensure that the voltage of the electrical device does not exceed the rated voltage.

 

02 Current Limit
The current limit is to ensure that the current through the electrical appliances does not exceed the rated value or the actual work required to ensure the normal operation of the electrical appliances. By connecting a variable resistor in series, the current limiting circuit can limit the current beyond the maximum current of the component. This can ensure the performance and life of the electrical appliances and avoid burnout.

 

03 Converting electrical energy into internal energy
Resistors can convert electrical energy into internal energy. Through the action of resistors, when current passes through resistors, all or part of the electrical energy will be converted into internal energy. Electrical appliances used to convert electrical energy into internal energy are called electric heaters. For example, electric stoves, rice cookers, heaters, etc.

 

04 Filter
The function of the resistor in the filter circuit is mainly to form a filter circuit in parallel with the capacitor. The filtering effect can remove the obstruction of the high frequency signal and retain the real and useful signal.

 

05 Jumper Function
Jumper function is to facilitate the circuit debugging and fault analysis, but also can play the role of open circuit processing. In both digital and analog circuits, a jumper can be used to separate the two grounds and a resistive connection can be used in the ground circuit without the need for removal. At the same time, it can also be used as a fuse to protect the circuit.

 

06 Use as a configuration circuit
The resistor is used as a configuration circuit and is fixed by welding, which avoids the user from modifying the configuration at will and improves the stability and reliability of the product.

 

07 Converts current to voltage
The resistor can convert current into voltage. According to Ohm's law, the resistor can easily calculate the current through the resistor access circuit, and use the current for corresponding measurement and control.

 

08 Dummy load
The dummy load is usually connected in parallel with a resistor at the output end of the power supply, so that no load is formed at the output end and the output voltage is clamped. Of course, the resistance of the resistor can not be too small, too small resistance to increase the power and loss and damage the resistor itself.

 

09 Impedance Matching
Impedance matching is a use of resistance, which matches the impedance of the load by changing the impedance of the resistance, so as to realize the transmission of the signal. Through the impedance matching, the maximum power output can be obtained.

 

10 Acquisition of non-electric parameters
The first use of resistance is to collect non-electrical parameters. We know that there is a certain relationship between resistance and temperature. In order to collect temperature, we can use positive temperature coefficient thermistor or negative temperature coefficient thermistor to collect.

 

11 Fuse
The fuse is a resistance sensitive to current, which will be disconnected when the current exceeds a certain value to protect the rear circuit. By connecting a 0 ohm resistor and a certain size resistor in series, a fuse is formed. When the current exceeds a certain value, the fuse will be instantly disconnected, thereby protecting the circuit from being burned. The fuse plays a protective role in the circuit to prevent the current in the circuit from exceeding the rated value and avoid a short circuit accident. 

 

12 heating wire
Resistor plays a very important role in the circuit, mainly used to control the flow of current and energy conversion, to achieve stable operation of the circuit. At the same time, the resistor can also be used as the matching load of the circuit, for the feedback of the amplifier circuit, the voltage-current conversion, the voltage protection element when the input is overloaded, and the RC oscillation circuit. Through the heating of the resistor, we can feel the flow of current in the resistor, so as to realize the heating, heat preservation, current control and other functions of the circuit

 

13 Single point grounding
Single point grounding means that the grounding wire and the protective grounding wire are separated on the equipment and become independent systems. This can effectively protect the safety of equipment and personnel, and avoid accidents caused by ground faults. At the same time, single point grounding can also achieve isolation between equipment, improve the reliability and safety of equipment.

 

14 pull-up, pull-down
Pull-up and pull-down are mainly used in single-chip circuits or complex circuits. By pulling the interface up to the resistor through the resistor, the level of the interface is made high in the initial state, and then the resistor is pulled down to GND when needed to keep the interface stable.

 

15 ID cards that can be used as elements
The resistor can be used as an element of the ID card, which has many important uses. First, the resistor can be used as an element of current to measure the magnitude and direction of current. Secondly, the resistor can be used as an element of voltage to represent and control the flow of current. In addition, the resistor can also be used as a resistor to realize series and parallel connection in the circuit to realize complex circuit functions. Finally, the resistor can be used as an element of the indicator light to display the status of the resistor and the fault detection function. In short, as a common electronic component, resistance has a wide range of applications and importance.

 

16 Convenient wiring
Zero-ohm resistance can be convenient for wiring, can be welded on the board instead of jumpers, dip switches, etc. to prevent users from messing with settings, and can be used instead of inductors or capacitors. Zero-ohm resistance can be used instead when circuit parameters are uncertain, and then changed after confirmation.

 

17 Resistance bias effect
The resistor bias function is to ensure that the size and direction of the bias current of a resistor in the circuit meet the design requirements. By adjusting the resistor bias, the deflection of the current in the circuit can be controlled, so as to achieve the normal operation of the circuit.

 

18 Convenient to measure current consumption
The zero-ohm resistance can easily measure the current, and it can also be easily debugged and measured. It can be used to measure the current by welding on the board instead of jumpers and dip switches. In the high frequency signal, the zero ohm resistor can also be used as an inductor or capacitor, and can also be used as a temperature compensator.

 

19 Positions reserved for commissioning
The place reserved for debugging is to ensure that the selected values do not cause subsequent errors or fail to function properly when debugging operations are performed. This can avoid the unexpected situation in the debugging process and ensure the stability and reliability of the system.

 

20 for current loop when jumper
It is used in the current loop when bridging, which can provide a short return path and reduce interference.