Harnessing a multitude of complementary green energy sources is the
only plausible way to satisfy the energy demands of a greedy global
economy. The potential of solar energy (being the most abundant) in
fulfilling part of the energy requirements of mankind is immense
and constitutes the focal point of this book. A self-powered solar
tracker that points directly towards the sun by means of an
integrated control mechanism with two degrees of rotational freedom
was studied and developed. The electro-mechanical control system is
based on a precisely-timed microcontroller circuit that first
computes the altitude and azimuth of the sun in real-time and then
drives a pair of stepper motors that steer the solar tracker
towards it. A locally built fibre-glass parabolic dish, the surface
of which is lined with a reflective vinyl mirror film, serves to
concentrate solar rays on its surface.
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