[David], [Ian], and [Sajjad] finished and submitted their entry to the ChipKIT challenge just under the wire. They designed and built a maximum power tracking circuit for use with renewable sources. That is to say, this is a voltage regulator for use with solar cells and other generative sources like wind or water power. The idea is to use the best concepts of switch-mode power supply design, but replace the more wasteful parts with circuits that can harness and roll the loss back into the output.
We have to admit, following their development choices from the write-up at the top is a bit rocky. But luckily they filmed an in-depth description of the design choices, as well as a demonstration of the circuit along with various test measurements. If you’ve got twenty minutes and some patience all will become clear in the video after the break.
This will go along great with that bucket-based hydro generator you built.