One needs to connect the input capacitor and an output capacitor to the IC 7805 to work as stated according to the datasheet. The heat sink is a must because the voltage drop of 4 volts is to be dissipated as a heat though the Heat-Sink.

The absence of heatsink will destroy the IC and you will be with a damaged IC. The input voltage must be at least 2.5V greater than the rated output voltage.

Components required:
One 9v battery/ 9V adopter power supply, 10uF capacitor, 0.1uF capacitor, IC LM7805, Heat-sink, some wires or connectors, and soldering iron.

 

Working:

For obtaining a steady and reliable output voltage, the voltage regulators IC’s are used. The integrated circuits that offer linear voltage conversion and regulation are often named as transformer ICs. Here, we have discussed 9v to 5v DC converter using IC 7805.

The transformer IC 7805 is part of the LM78xx series of transformer ICs. It is a linear transformer IC. The digits ‘xx‘ represents the value of the output voltage regulated. The 7805 IC gives 5V DC  as the digit ‘xx‘ showing (05). The input voltage can up to 35V, and output will be constant 5V for any value of the input.


If any doubt arises ,ask in comments section.

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