Voltage Regulator Circuit Using 7805. Connect the negative lead the short one to the middle pin pin2 of 7805. 7805 7812 7905 etc.
For example 7805 ic requires minimum 6 5 volts to give 5 volt output. Selecting a suitable transformer is of great importance. The batteries provide different voltage ranges like 1 2 volts 3 7 volts 9 volts and 12 volts.
7805 ic provides 5 volts regulated power supply with provisions to add a heat sink.
7805 is a three terminal linear voltage regulator ic with a fixed output voltage of 5v which is useful in a wide range of applications. For example 7805 ic requires minimum 6 5 volts to give 5 volt output. Such as 12v should use ic 7812 but sometimes we don t have this number for any reason. Lm78xx series are from national semiconductor.
