Written by: Newton C. Braga

   This simple, unregulated power source with full-wave rectifying is for small appliances that do not require absolutely fixed voltage. The transformer can be 6 to 9 V and diodes 1N4002. The wire potentiometer helps regulate the voltage in the load so that it is as close as possible to what is desired. The current of the transformer can be from 100 to 500 mA.