Fixed voltage ... the Regulator IC 7805 to give 9 volt regulated output. Normally the pin2 of the regulator IC is connected to the ground. Here it is connected to a 3.9 volt Zener diode. So the output ...

For the longest time, Zener diode regulators have been one of those circuits that have been widely ... “Zener Diode makes for a Lousy Regulator” that clarifies the misconceptions behind ...