Solar Cell Battery Charger Circuit Diagram

The circuit diagram shown below probably satisfies all the above specifications and yet stays within the affordable limit.

Solar cell battery charger circuit diagram. The charging current passes to lm317 voltage regulator through the diode d1. The battery can not be removed. The circuit is using an lm317t voltage regulator ic. As per the request the solar pocket led light circuits needs to be compact work with a single 1 5aaa cell using a dc dc converter and equipped with a self regulating solar charger circuit.

And now we come to making your own battery charger. The bc548 transistor is working as a switch which will disconnect the ground of the lm317t from the solar cell when the battery become full charge. The solar cells ve terminal is interfaced through the diode to the ve terminal of the 1 2v battery. Solar battery charger operated on the principle that the charge control circuit will produce the constant voltage.

It uses a mini jack socket for charging. As shown in the above wiring diagram simply solder the solar panel in parallel and connect them to a boost converter module through a switch. Solar battery charger circuit principle. If the voltage of the solar cell drops below 1 4 volts with the 0 2v the blocking diode takes there won t be enough potential to charge the 1 2v battery.

Circuit diagram of cell phone solar charger is given below. The output voltage and current are regulated by adjusting the adjust pin of lm317 voltage regulator. It is quite difficult to find such a voltage charger. A solar cell radio used a 3v or two 1 2v nickel cadmium battery or nickel metal hydride battery in it.

Here we can also use solar tracker circuit so that sun light can fall on the panels all the day.