Solar Charger for 6V Battery
출처:http://www.electroschematics.com/4746/solar-charger-circuit/
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Schematic of the Solar Charger Circuit
video presentation of the working circuit with a 6V battery
VR is placed between the adjust pin and ground to provide an output voltage of 9 volts to the battery. Resistor R3 Restrict the charging current and diode D2 prevents discharge of current from the battery.