Help: Regulated Power Supply

[muki55]

Will the circuit work satisfactorily by adding the following changes:

1. extra diode(in4001) in the base connection of short circuit protection transistor Q2.

2. add one more diode in series to existing diodes(reference) or replace the three diodes using a 2.5V reference like LM336

3. recalculate the output voltage divider

4. forget the above and just use a three terminal regulator like LM317 or its higher current brothers

Hardcore Misery were told not to use an IC on the designed schematic

 

[Tuxicle]

Why a diff pair, opamp, etc? You can use a single transistor in CE mode, with a zener diode reference in the emitter, base has the feedback voltage.

To the OP: go to your university library and pick up a dusty old copy of Millman and Halkias, or Horowitz and Hill. You should find plenty of hints there. Kids these days... pfft!