Dear Joe (and everyone else who has written!) Thanks for your kind note. I AM still working on this project and I did make some progress...

Here is the motor drive for the parabolic solar heater on the bench while I was running the yoke from one end to the other using the small D...

Aiming the entire solar heater array toward the sun is done with one very small and low current 12 volt DC (direct current) gear motor (moun...