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Hello everyone, in this lesson we will learn the names and symbols of power supply

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The name of the power supply is various, and may have different names in different circuits

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However, commonly used names for power supply are VIN, VOUT, VCC, VDD, etc.

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For example in the circuit diagram on the right

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The eighth pin of the chip is VCC, indicating that the eighth pin is the power supply pin of this chip

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At the same time, the name of the power supply it is connected to is +3.3V_SPI

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Next, let's look at the circuit symbol for power supply

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Common power supply symbols are as follows

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They are circuit symbols used in circuits of different manufacturers, and there is no difference in essence