12v to 5v 7805 circuit diagram

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In some cases, it is necessary to add a 5V power supply voltage, but the transformer has no idle windings available. In this case, the 7805 can be connected to the 7812 for application. The following figure shows that the 7805 is connected to the voltage point of 12V after the 7812 voltage regulation. The disadvantage of this method is 7805. The loss is a bit large and it needs to be hot. Because the 7805 input and output voltage difference is too large, it has reached 7V.