Lm7805 Power Supply Circuit. The circuit is using two assorted fixed voltage regulator ics. 7805 voltage regulator circuit a voltage regulator is used to produce a constant linear output voltage.
Lm7805 regulator ic is a common but an important part of much 5v power supply circuit available in the market today. In the first part the ac mains is converted into unregulated dc and in the second part this unregulated dc is converted into regulated 5v dc. The central ic is lm7812 which will change over the voltage starting from the transformer and gives a 12v controlled output on pin 1 of the lm7805 ic.
Here is a dual adjustable power supply circuit diagram.
If you need higher currents up to 3 a you must add a complementary transistor t2 in this schematic. Output currents up to 1a can be drawn from the ic provided that there is a proper heat sink. And also it can be used as well as a dc to dc voltage converter. If you observe the working of the circuit can be divided into two parts.
