+30V power supply with +5V

+30V DC-DC converter

+5V Switching regulator (1)

6V to 12V Converter

+9V *and* -9V from one battery

Bench power supply

Dual Polarity Power Supply

Dual power supply

Easy bench power supply

Fixed Voltage Power Supply

Generating Negative 5 Volts from 9 Volt Battery

HV supply: 12VDC in, 12KV out

High Current Power Supply

High Voltage High Current Power Supply

Kirlian device supply

LM317 adjustable power supply

LM317 Variable Voltage Regulator

Low-dropout 12V regulator (LM324)

Night Vision Scope 13.5KV power supply

Negative voltage generator

One 9V battery gives +18, +25, +33V

Practical voltage converter

Simple power supply
Student DC Supply  +5VDC regulated, +10VDC unregulated and 7.5VAC

Switching regulator circuits

Transformerless Power Supply

Vacuum Tube power supply

Variable Dual Lab Power Supply

Voltage Inverter

Voltage Inverter II

Power Supply Components

@ e-Gizmo

Pictured from top top bottom:

Capacitor, Resettable Fuse, DC-DC converters, ICs, Rectifiers.

Also available: SMPS power supply module, rechargeable battery, etc..