

This is a 5V Voltage Regulator that restricts the voltage output to 5V and draws 5V regulated power supply. The 7812 is the most common, as its regulated 5-volt supply provides a convenient power source for most TTL components. L7812 is a series of 78XX voltage regulators. For ICs within the family, the xx is replaced with two digits, indicating the output voltage (for example, the 7812 has a 12-volt output, while the 7805 produces 5 volts).