When you want DC power supply Circuit , model to fine the value Voltage get 0-30V for apply general work. I thinks this circuit may is appropriate , because of give current get 2 Amp enough be usable experience all get comfortablely. By it uses ordinary equipment seek easy be IC [...]

Features: 1.3-12.2 V, 1 A, over-current protection. This is a simple but reliable device based one of the oldest integrated voltage regulators of them all - the LM723. Link

A 10,000uF/50V electrolytic capacitor completes the filtering of the 28.8V. Yep, C1 is a real clunker. You can use larger if you like, just watch it when you power up. Without a ‘power-up’ delay circuit of sorts it will probably blow-up the 723 if the capacitor (C1) is too-large. The DC voltage coming from BR1 [...]