In this step-by-step guide i'm about to teach you how to design and build a simple solar charger.
What you'll need:
1) Solar panel.
2) Adjustable Boost Converter Charger Module.
3) Electrical Wires.
4) USB female cable.
5) A box.
6) Recommended - portable USB charger, a cord, led.
7) Soldering Tin.
8) Duct tape.
2) Soldering iron.
3) Hot glue gun.
4) A knife.
Step 1: Attaching wires to the panel
Cover it with the duct tape.
Step 2: Adjusting
connect the panel to the module (to the input).
Step 3: Connecting USB
Cut near the borders that you've marked so the hole is a bit smaller than the panel.
Now glue the other parts to the bottom of the box so they wont move, in the side make a hole as big as the USB cable.
* I recommend gluing the USB output well so sand and dirt wont come in.
**If you had cotton wool in the box i recommend putting it between the panel and the bottom it will also help preventing the parts moving.