Smart Solar Charger. Design Note 31

IMAGEYou can make a simple Current regulated Charger for your Solar Panel. It safely charges the 12 volt battery with a constant current of 540 Milli Amperes. It needs only a few components and can be hooked between the Solar panel and the battery. It also has an LED charge indicator and a revere polarity protection diode.
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Regulated charger with Backup. Utility Gadgets.10

Here is a Battery backup circuit with regulated charger. The circuit immediately takes the 12 Volt load in the event of a mains failure. The circuit also has a constant voltage and current regulation section and a battery full indicator. This kind of circuit is used in UPS and Inverter. The circuit is designed for 12 volt battery but it can be used for 6 volt battery also with slight modification
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