How to make a power bank that charges with solar energy in an easy way

Making a power bank that charges with solar energy can be a fun and easy project to do at home. Here are the steps you can follow:

Materials:

A 5V USB charging module
A 3.7V Li-Ion battery (choose a capacity based on your needs)
A small solar panel (5V, 1W or more)
A voltage regulator (LM7805)
A diode (1N4007)
A switch
A small project box or enclosure
Wires, soldering iron, and other basic tools
Instructions:

First, connect the solar panel to the voltage regulator using wires. The positive wire of the solar panel should be connected to the input of the regulator, and the negative wire should be connected to the ground.

Next, connect the output of the voltage regulator to the positive input of the charging module, and the ground to the negative input of the charging module. Make sure to double-check the connections and polarity.

Connect the battery to the charging module, positive to positive and negative to negative.

Add a diode in between the voltage regulator output and the charging module positive input. This will prevent the battery from discharging when the solar panel is not generating power.

Finally, add a switch to turn the power bank on and off as needed.

Place everything inside the project box or enclosure, and you now have a solar-powered power bank!

Note: Be sure to use caution and proper safety equipment when working with electronics and soldering.