Today we are going to learn how to make a simple solar battery charger for 6V battery.
The solar charger we are going to make is based on LM317 regulator IC. When battery has reached is full charge voltage (Battery voltage is higher than VDz + 0.7v), our charger circuit automatically cuts the charging to protect the battery form damage. The LED light will indicate the full charge state in the battery.
Our charger circuit will work only when the voltage level from the solar panel is much higher than the battery voltage, unlike the solar charger with regulator and controller that can charge regardless the solar voltage.
Part List:-
Solar - 12V solar cells array
C1 - 470uF electrolytic capacitor rated 25V
D1, D2 - 1N5400 or any rectifier diode rated 2A minimum
Dz - 1N5235B or any 6.8V zener diode
R1 - 3 kilo ohms 1/4Watt
R2 - 330 ohms 1/4Watt
R3 - 560 ohms 1/4Watt
R4 - 2 kilo ohms 1/4Watt
LED -3mm or 5mm Red or any low power LED
Q1 - 2N2222, CS9013, or similar NPN transistor
Bat - 6V lead acid battery
Make the above simple circuit to charge your 6V battery from clean and environment friendly energy.
If any query arises pleas ask them in the comment section, i will be happy to answer.
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