Sun tracking solar panel powered fountain

This is an 8 hour time-lapse of the solar panel tracking system that I designed to track the sun to squeeze out a few more Watts to power my decorative fountain. It's oddly satisfying to watch, and I often look at it from my living room window - or when out in the yard. It has "personality" as it sometimes hunts for the best light in the sky as you can see at the end of the day. Fun!
And it uses an elegant all analog control circuit I designed - no computer or digital electronics.
Here's the video showing how I designed and constructed this:
• Solar fountain experim...
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