Versatile and simple power supply is one of several series of power supply many other well-known, because making a fairly easy circuit power supply is also nice, versatile addition also can be used on any circuit, for example, Radio tuner, Intregated power amplifier circuit, etc. . But we need to know the Versatile and simple power supply is not used to charge the battery because it will quickly damage the transistors that exist. To have a good output voltage, use of quality components. Versatile and simple power supply Part List : R1 = 1K C1 = 0.22uF 275V C2 = 4700uF 50V C3 = 100n C4 = 220uF C5 = 1000uF Q1 = TIP30 T1 = Step-down Transformer 220V to 12-35V