Power supply

A friend of me want power supply 5V 2A circuit. In model to be simple use the a little equipment build easy. I then choose this circuit gives him. By it uses pillar equipment is IC 78S05. Which be IC voltage regulator 5V / 2A [...]

This DC-DC converter (”inverter”) needs nothing but unmodified Radio Shack parts. You don’t need to build or wind any coils or transformers. This is a cheap-and-dirty experimenter’s circuit. I tested this and it worked for me, but I disclaim all warranties!
Read more original source:
http://members.misty.com/don/rsinvert.html

The CEMF charger uses the CEMF (counterelectromotive force) from an inductor to charge a capacitor to high voltages from a low voltage source. A simple schematic of a CEMF charger is shown below.
Source: http://www.geocities.com/mistertippy/schematics/CEMFC.html