12 volt low efficiency, low resolution logic

[OnAudio]

Heat dissipation and accuracy are all the rave with todays highly portable processors but for basic processing like over and under voltage protection say switching on the power to the main trannie if voltage is either between 80-145volts or 180-290volts and auto selecting primary windings configuration if voltage is above 145volts one can use 12volt logic rather than 3.3volts.

 

[soekris]

For logic functions, I would use CMOS 4000 series parts....

 

[OnAudio]

Yes they are definitely more compact and cheaper, however one can use ones own stock of parts to make discrete logic

 

[OnAudio]

using comparators with references minimizes bit level errors but its not fool proof