"The Scavenger" A Joule Thief inspired Boost regulator.
Presented here is a significant step forward in simple, cheep, and efficient boost converter design
LM317 Adjustable 20V, 1.5A Supply with Simple SMPS Tracking Preregulator
LM317 supply with switching tracking prereg for good efficiency and minimal heat sink requirements.
Swinear Power Supply
Higher power linear regulator
PWM Voltage Control Of Standard Linear IC Regulators
PWM allows easy control of linear regulator output voltage for μP based power supplies
Simple, Efficient, Inexpensive, High-Power LED Constant-Current Switching Supply
Constant-current hysteretic buck regulator supply for high power LEDs, efficiency of 90%
MOSFET Bridge Rectifier With Low Forward Drop, Works With Capacitive Output
MOSFET Bridge Rectifier gives high efficiency for low voltage, high current AC-DC supplies
LINEAR POWER SUPPLIES: THEORY & CIRCUITS
Linear power supply core theory plus circuits that can be adapted to suit your application