DIY Smartphone Solar Charger with Battery.

Smart-phone Solar Charger with Battery.

In this tutorial, I will show you how to charge a lithium 18650 cell using a TP4056 chip using solar power or just the SUN.

You need the following for this project:

- 5V Solar Cell.
- General purpose circuit board. (Blank PCB)
- A 1N4007 (1000V) High Voltage, High Current Rated Diode (for Reverse current           protection). 1N4007 diode is rated at 1A forward current and reverse peak voltage rating is 1000V.
- 0.5 Copper Wire.
- 2x PCB Screw Terminal Blocks.
- 3.7v 2500mah Battery Holder.
- 3.7V 2500 Mah Battery.
- TP4056 battery protection circuit.
- 5 V voltage booster IC.
- connecting cables.
- soldering equipments.

The assembly is very easy.

The solar cell is connected to the IN+ and IN-battery charging boards of the TP4056. A diode for reverse voltage protection is inserted at the positive end.
The board's Battery + and Battery - are then connected to the battery 's + ve and -ve ends. (Everything we need to charge the battery).
Now we need to boost the output to 5v to power an Arduino board. Therefore, we add a 5v voltage booster to this circuit.
Connect the battery end to the booster's IN and+ ve to IN+ by adding a switch between them.
Now let's look at what I've done.-I've connected the booster board directly to the charger, but I'll recommend that you place a SPDT switch. Therefore, when the device charges the battery, it only charges and is not used.
Solar cells are connected to the lithium battery charger input (TP4056), the output of which is connected to the lithium battery 18560. A 5V booster is also connected to the battery and can be converted from 3.7V dc to 5V dc.
Typically, charging voltage is around 4.2V. The input range of the Voltage Booster is 0.9 to 5.0V. It will see about 3.7V when the battery is unloaded and 4.2V when the battery is recharged. The booster output to the remainder of the circuit will maintain a value of 5V.
This project is very helpful in set up a remote data logger. As we know, power supplies are always a problem for a remote logger and there is often no power outlet. Such a situation forces you to use certain batteries to power your circuit. But the battery will eventually die. Is the question you 'd like to go and charge the battery? 

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