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7805 Voltage Regulator IC Pin Identification

By on July 5, 2013

Last week due to high voltage the tape recorder was burned. simply i have removed the screw and  checked the components .there is one capacitor value 4700mf /50v ,2200mf,1000mf capacitors are blast.just i have cleaned the cabin .there is one more thing 7805 is connected wires are removed.i don’t know where to connect those wires. Please give me the hints.


First you need to know that pin 1 of 7805 is the dc supply voltage, pin 2 is the ground and pin 3 is the output voltage. The output voltage of 5 volt is going to mainboard or circuits. Pin1 dc supply voltage usually comes from the power supply secondary side and the voltage should be more than 5 volt. It could be from 7 to 20 volts. This 7805 according to the specification can take up to 38 Vdc for input voltage.


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