6-12 VOLT BATTERY CHARGER
The circuit is a high efficiency
charger, it is useful for charging 6 to 12V batteries using small
number of solar cells. The solar cells can be connected in series
or parallel to generate 1 to 12V , cells voltage has to be lower
than battery voltage. When the mosfet is on it charges the coil with energy from the solar
cells, and when the mosfet is off that energy is discharged into the battery.
See also Technical Tips
The 6 inverters CMOS are used
as a free running oscillator. The MOSFET charges the coil when it's
on, and when it's off the coil dumps its charge via the diode into
BS170 can be replaced by equivalent
The MOSFET and the diode are
capable of charge currents up to 50mA, for higher currents they
can be replaced by higher current components.