A very simple 2-cell series supercapacitor charger electronic circuit project can be designed using the LTC3226 integrated circuit designed by Linear Technology .
LTC3226 2-cell series supercapacitor charger includes a charge pump with programmable output voltage, a low dropout regulator, and a power-fail comparator for switching between normal and backup modes.
A very simple portable 12 to 250V converter can be designed using this circuit diagram. This 12 to 250V converter is designed for portable use with a 12 V car battery.