Difficult Problems:
Can ordinary resistors replace precision resistors?
In a certain temperature range, the error of the precision resistor is much smaller than that of the ordinary resistor. That is to say, the temperature stability of the material for making the precision resistor is higher than that of the ordinary resistor. Can the ordinary resistor replace the precision resistor? Edited for everyone to share.
The application of the resistor in the circuit is generally current limiting and voltage dividing. The current limiting part does not need to consider the precision resistor. The partial voltage part can be divided into two types:
1. The accuracy of the voltage has little effect on the successor circuit. Here, the voltage divider resistor is used in common.
2. The accuracy of the voltage has a great influence on the successor circuit. Here, the voltage divider resistor is used with high precision. Of course, it is not excluded that individual designers do not consider the use requirements and costs, and the accuracy of setting is much higher than the demand, but this is a case and is not considered.
Ordinary resistors are only determined by roughly estimating the resistance value. Precision resistors require accurate voltmeters and current meters to determine their resistance by repeated measurements. If you replace the precision resistors with ordinary resistors, you will experiment. Or the result of the test has a difference, which is inconvenient for yourself. Precision resistors can replace ordinary resistors, and ordinary resistors cannot replace precision resistors. 
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