Solar Charging Back Case Cover for Smartphones Under 4$

note -

I would like to emphasize that the logos seen in the pictures should not be imitated. Most of them are protected by copyrights, and it is important to respect the feelings and rights of their respective owners.

Any suggestions or improvements are highly appreciated, both for this instructable and the machine involved.

I cannot be held responsible for any damage caused to your phone or any other device due to cross-wiring or circuit errors made by you. Please proceed with caution and undertake this project at your own risk.

If available, consider laminating the solar cell and circuit with a tight cover to ensure everything stays securely in place.

Lastly, I kindly request you to press the heart icon to show your appreciation and help spread the love. Additionally, please add this instructable to your favorites for future reference.

A Hassle-free, Compact, and Highly Portable Solar Charger Backup Pack

This project introduces a hassle-free, compact, and highly portable solar charger backup pack for your phone. Imagine those moments when you forgot your charger, and your friends planned an unexpected trip. You can't capture photos, listen to music, or even play Pokémon Go because your battery level is at a measly 5%. We've all experienced that struggle. But from now on, you can do whatever you want, listen to every track on your phone, and catch every adorable Pikachu without the hassle of carrying an extra battery pack (during the daytime only). This solar charger sticks to your phone all the time, so you don't have to manage that extra accessory.

Simply place your phone's back facing up (or the sun's side) and let the magic happen.

And the best part? It costs under 4 units (specifically 3.64, but let's round it up).

Isn't that great?

Now, let's proceed to the bill of materials needed for this project.

Step 1: Bill of Materials

1. A Hard-Soft Case of Your phone maybe old , or maybe those china ones for a cheap alternative.

2. A minimum 3W mini solar panel (Not larger than your phone's cover).

3. A LS7805 (5V Voltage regulator.)

4. Diode 1N4001 or 1N4007.

5. A Smd LED(opt)

6 . 10K Resistor(SMD if available.)

7. Automotive Epoxy or SuperGlue.

8.2 X 10uF Capacitor(SMD if available)

9. Lamination Paper (opt)

10. WIres (thin copper wires can also be used.)

11. An old Data cable (Compatible with your phone , we'll be using Micro USB in this instructable)

// OPT Stands for Optional i.e. are add onns

Step 2: The Circuit.

Assemble and make the circuit as in the picture. be careful to not to switch any of the wires.

Led can be installed with a resistor on the power jack , you can skip that for a 10mA boost.

And the charging speed of your phone depends on a lot of factors. like intensity of sunlight, and power of solar panels, types of diodes, Phone's charging IC's capabilities .etc.