This is a schema of a 1.5 Volt source, ideal for replacement of batteries of 1.5 or 1.2 Volts for bench tests, feed circuits with a battery with more tension as those of 9 and 12 Volts, or even use as a battery Eliminator. The circuit is simple, it is based on the 317 regulator integrated circuit, IC is adjusted through the 220 and 47 Ohm resistors to provide a 1.52 output Volts. LM317T, CI was used where a heatsink was added, can also be used a battery instead of the fonts and bridge rectifier from diodes that are in the schema.
http://www.eletronica.com/fonte-de-alimentacao-1-5-volt-regulada-usando-lm317/
