- A 7805, 7809 and 7812 Voltage Regulator is a voltage regulator that outputs +5 volts.
- The 7805, 7809 and 7812, like most other regulators, is a three-pin IC.
- Pin 1 (Input Pin): The Input pin is the pin that accepts the incoming DC voltage, which the voltage regulator will eventually regulate down to 5 volts.
- Pin 2 (Ground): Ground pin establishes the ground for the regulator.
- Pin 3 (Output Pin): The Output pin is the regulated 5 volts DC.