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Build a solar USB charger

Weekend project · Use what you have · Easy

Put together a small solar-powered USB charging setup for learning, camping preparation or emergency kit experiments. Use purpose-made USB power-regulation parts rather than connecting a panel directly to a phone.

Solar charge controller and connected photovoltaic cables being installed on a roof frame.
Photo via Pexels

Do it

  1. Choose a solar panel, battery pack and regulated USB output module.
  2. Check that the components have compatible voltage ranges.
  3. Connect and test the charging circuit in bright daylight.
  4. Put the parts in a weather-protected enclosure.
  5. Test it first with a low-value USB device or meter.

What next?

Keep the useful notes, photograph the result if there is one, then go and find something else to do.