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[Bryan] got his hands on a solar panel and decided to take it on the road rather than throwing it on the roof of the house. On sunny days it will top off the car battery, letting him use his stereo in the middle of nowhere without needing to keep the engine running. Instead of [...]

Tags:  truck prototyping charger bryan solar-charger solar-panel car-battery green hacks  

As soon as the team at Revolt Labs heard Occupy Wall Street was coming to Boston, they decided to pick up their soldering irons in support of the throngs of protestors. They came up with a Solar charging USB box to keep those cell phones and digital cameras charged. The case came direct from an [...]

Tags:  solar team charger occupy-wall boston soldering-irons solar-charger throngs green hacks  

Make your next project solar-powered with this charging circuit. It’s completely through-hole, and there are no microcontrollers that need to be flashed. If you can source parts and are handy with a soldering iron building this will be a breeze. Both the maximum system voltage and the low voltage drop out are configurable. After assembly, [...]

Tags:  efficiency circuit voltage lead-acid-batteries high-efficiency solar-charger green hacks