Solar powered arduino on the back of a playing card

Here's a six word tragedy: My arduino needs four AA batteries. Really?  Isn't this 2012?  Where's my jetpack?!! Here's a way to the future -- a way to make a solar panel, from scratch, that can power any arduino off of sunlight or even light in your house.  Sort of a peel-and-stick power source for your projects. Time to complete:  15 minutes No soldering required Difficulty level:  Easy as pie (key lime) L ...

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