The following schematic is one of the step up DC to DC regulator uses to produce voltage 12V or 9V from a 6V DC source. The parts and components will be easily found in the market. The only uncommon parts is the L1 coil. This part for the L1 coil can also be used: 6v DC motor, plain insulated hookup wire on its plastic reel, 12v DC solenoid from an old floppy drive, 60 turn coil on ferrite former. The C1 and R1 value can also be changed in order to change the oscillation frequency.

dc to dc switch 6v to 12v circuit schematic diagram

dc to dc switch 6v to 12v circuit schematic diagram

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