I would like to build an electric load simulator for testing purposes along the lines of this link: http://ieeexplore.ieee.org/Xplore/l...275321.pdf?arnumber=4275321&authDecision=-203 A salt box would work (I have an old water softener tank), as would resistor banks, electric heaters and fans but these items give up the load as heat and are costly/dangerous to operate. Is there a "simple" way to have a motor turn another motor (as a generator) and insert the power back into the circuit? This would be a much more efficient way to create a power load. I have motors lying around, but am in way over my head here. Can someone point me in the right direction? Thanks.