DIY Solar Powered Cellphone Charger

By on April 9, 2014

Cell phones are one of the modern conveniences we rely on the most.

The average person would be completely lost if forced to live without their phone for a day, much less for a longer span of time.

You can be left without electricity for an extended amount of time for multiple reasons.

Blackouts, fallen power lines, being in a survival situation, or just going on a camping trip can leave you an outlet short to juice up your technology.

Quickly, your phone battery is drained and your devise becomes useless.

We have a solution to this problem, and it comes in the form of a portable, rechargeable, solar powered cell phone charger.

Keep reading to learn how to build your own!





  • Solar Panel
  • USB Power Bank
  • 4 Port USB Hub
  • 7805 Regulator Chip
  • Micro USB Cable  With a Stripped End
  • Multitool
  • A short length of stranded wire
  • Superglue

DIY Solar Charger Steps:

Solder And Mount The Regulator

Screen Shot 2014-04-04 at 2.00.26 PMsolar-chargersolar-chargersolar-charger solar-charger

Mount The Remaining Devices

solar-charger solar-charger

Finished Solar Charger






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  3. David LeVine


    You left out three very important parts: Two small ceramic capacitors and a diode.

    The 78xx family can self destruct if the output exceeds the input for a few microseconds and any of the devices can oscillate without bypass capacitors.

    A 1N400x diode with the cathode to the input and the anode to the output means that the worst case is one diode drop from output to input, protecting the device.

    Two 0.33 uF ceramic capacitors, one from the input to ground and one from the output to ground, with VERY SHORT LEADS will prevent the potential oscillation, which may make your cell ‘phone useless while it is charging.

    References to these changes come from TI’s datasheet, page 14, figure 21 and page 11, figure 21. This datasheet can be found on Digikey’s site.

    • David LeVine


      Oops, that is figure 28 on page 14, not figure 21.

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