Description
In this project we show that how battery is charge through rectifier circuit. When battery is fully charged then another circuit is automatic on as main light fails. In this project we use one step down transformer to step down the voltage from 220 volt to 6 volt AC. This AC is further converted into DC with the help of Rectifier Diodes. Output of diode is further smooth by capacitor filter. We use this DC voltage to charge the battery. At the same time PNP transistor is reverse bias through the positive voltage on base. When main light fails then
PNP transistor is bias through the battery and , so output LED is automatic on
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