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Many of us needs to provide energy and here a simple scheme to charge the phone through the solar panel

Step 1: Used the Pieces

Many of us needs to provide energy and here a simple scheme to charge the phone through the solar panel
All you need :

Solar Panel

Charging cable phone

Lm 317 , R200 ohm , 5K Variable resistor , 100µf capacitor

Step 2: Circuit

First, your design this circuit

And here anyone who wants a printed circuit industry in the form of PCB

Here you can use voltage regulator 7805 is more stable than LM 317

Step 3: Installation

Install a solar panel in the circle and then the phone Link cable with the department and will work Almitricks for measuring voltage and abroad amended variable resistance until it reaches 5.2 V.

Congratulations and free electricity to charge the phone !!!

This was my first experience on instructables. I hope that I will appeal to you more soon ^_^

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