Thanks Wings !
That was really interesting info on thermoelectric generators--old and new.
The new ones that run off a simple camp stove and put out 5 watts are great. I can do alot with that 5 watts using some of the new circuits. The only problem is that the generators work by burning something and I am trying to get away from that. Reality is that FIRE is with us for good it seems so we might as well use the waste heat for something useful.