Before we begin, let’s take a look at three comparative experiments.
Experimental materials: power supply, green LED light, 10Ω/1/4W resistor
Tinkercad LED and Resistor Test Experiment
Proteus LED and Resistor Test Experiment
Multisim LED and resistance test experiments
Summarize:
Analysis: The working voltage range of green LED lights is 2.0~2.6V. If the voltage exceeds this range, if the current is not limited, it will cause permanent damage; each resistor has power, and if this power is within its heat dissipation range, It can work normally within a short period of time. If a large amount of heat cannot be dissipated in a short period of time, it will also cause permanent damage; the resistor in the case is 10R, 0.25W, the actual working power = U²/R=5*5/10=2.5W, which is much larger than 0.25W, but in fact, many simulation software modeling we use only builds basic versions of the models and does not build them according to the real models, which will mislead us to a certain extent.
Through the comparison of three examples, I just want to tell you that the software simulation is for reference only and should not be taken too seriously. If you have rich practical experience, you can still do it through simulation. Otherwise, you should just solder and build a physical circuit to sum up your experience.
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