Step by step build of 2N2907 pnp transistor zener diode regulated 5V circuit waste little current - YouTube
Transistor-Zener Diode Regulator Circuits
zener diode with PNP regulator mod for battery charger | Page 2 | Boat Design Net
Zener Diodes Kit, 1W Axial Leads Through Hole Power Diode Assorted Assortment Box Kit Set (3.3V/3.6V/3.9V/4.3V/4.7V/5.1V/5.6V/6.2V/6.8V/7.5V), Range 1N4728~1N4737,Pack of 200, By Ltvystore: Amazon.com: Industrial & Scientific
zener diode with PNP regulator mod for battery charger | Page 2 | Boat Design Net
Make Stabilized Zener Diode Using Transistor
PNP with zener diodes circuit - Electrical Engineering Stack Exchange
NPN Transistor, PNP Transistor, Classification, Construction of Bipolar Junction Transistor, Action, Modes of Operation and FAQs.
NPN Transistor, PNP Transistor, Classification, Construction of Bipolar Junction Transistor, Action, Modes of Operation and FAQs.
Transistor-Zener Diode Regulator Circuits
Can a Zener diode maintain constant base current to a transistor? - Electrical Engineering Stack Exchange
BJT Transistor (NPN and PNP ) Power Supply Monitoring Circuit - Electrical Engineering Stack Exchange
Power Supply Filter detection using Zener diode and PNP Transistor - Electrical Engineering Stack Exchange