Here is a 7812 voltage regulator circuit, but this is not a power supply with a 12V output voltage and load current 1A. IC LM7812 only serves as the input voltage of an LM723 regulator IC. So this power supply circuit with a larger load current capability with a variable voltage at the maximum voltage of 6V.
Output voltage range of the 7812 voltage regulator circuit is 2.5V-6V with 6A-8A load current. Increasing load current through the transistor...
7812 Voltage Regulator Circuit
