A very simple DIY solar-powered USB charger | Embedded Lab
20 DIY Solar Charger Ideas – How to Make a Solar Charger
DIY Solar USB Charger: 7 Steps (w/ Photos) - Footprint Hero
Solar USB Charger | Design for DIY Manufacturing
DIY Solar USB Charger: 7 Steps (w/ Photos) - Footprint Hero
Build Your Own Solar USB Charger (for Informal Learning) - Sprinkle - TeachEngineering
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
DIY Solar USB Charger: 7 Steps (w/ Photos) - Footprint Hero
How to build a solar-powered USB charger for your phone