DIY Solar-Powered Emergency USB Charger

Project Features

• Solar-Powered: Utilizes solar panels to convert sunlight into electrical energy.
• Portable: Compact design makes it easy to carry and use anywhere.
• USB Outputs: Provides both USB Type-A and Type-C ports for versatile charging options.
• Battery Storage: Includes a battery pack to store energy for later use.
• Real-Time Monitoring: Equipped with a wattmeter to display real-time voltage and current readings.

Materials List

Below is a list of parts needed, including quantities and links for purchase.

• 3D Printable Frame - 1 set (Custom designed to house the components)
• Battery Holder - 1x - Holds two 18650 batteries.
• Battery Level Indicator 1x - Displays current charge level of the batteries.
• Solar Panels - 6x - Mini solar panels rated for 5.5V 60mA.
• Dual USB Socket - 1x - Provides both USB Type-A and Type-C ports.
• Wattmeter - 1x - Digital LCD Display to monitor voltage and current.
• Charge/Discharge Controller - 1x - Manages charging and discharging of the battery.
• DC-DC Buck Converter - 1x - Used to upscale the voltage from the solar panels.
• Voltage Regulator (7805) - 1x - Ensures a stable 5V output from the solar panels.
• Capacitors - 2x - 0.1µF and 0.33µF for the voltage regulator circuit.
• Dupont Connectors - 1 set - For connecting wires easily.
• XXL Waterproof Rugged Box 1x - For housing the components.
• Any 18650 Batteries (I strongly recommend getting some more expensive ones and not cheap ones from China. They should be rated for up to 80 degrees celcius operating temperature) - 2x

For a full step by step guide on how to assemble this project you can read my Instructables post.

Disclaimer

Please note that this project involves working with electrical components and solar panels, which can be dangerous if not handled properly. Ensure you follow all safety precautions and double-check your work. I am not responsible for any damage, injury, or loss that may occur as a result of following this guide. Proceed at your own risk and always prioritize safety.