50V Heat Turbine
The heat turbine transfers energy from a high temperature on the red side into a low temperature on the blue side. The greater the difference the more energy is produced, as proven by the pitch of the satisfying noise the engine creates. This can be accomplished by putting a heat furnace on the red side, and a heat sink on the blue side.
Be careful not to spin it up too fast though, or else the machine will violently fail!
All one has to do to draw power from it is hook a machine into it. Power will flow from the engine's internal ground, into the machine, and then out said machine's internal ground. Every machine and engine which has only one terminal has the other terminal into the ground. The only exception are the solar panels and batteries which have a - and + terminal, the - node must be grounded in almost all circumstances to keep things simple which is why most engines do not have them.