  Gabriel writes in to share his homemade heliostat project. The
heliostat is the first step in his solar energy
experimentations, and it is designed to keep a mirror aligned so
that it keeps the reflection of the sun onto a specific point.
Once the energy is focused on that point, it can be harnessed by
other devices such as a solar oven. A single unit can be useful,
however it gets really fun when you start adding multiple
devices to concentrate a bunch of energy on a small spot.
1. Daniel Greening says:      Very cool! I wonder if existing
DMX lighting control technology could be applied to link home
made heliostats together.      1. Matt Mets says:        Hmm,
perhaps, then you could have a solar light show!