Dave, you need to do something about the input side to limit the negative going spike to a voltage that the input transistor can tolerate.

Yea the circuit is just a generic overview the details need worked out.
I will take it to a whole new level soon 

Quote from: Dave45 on August 22, 2014, 10:04:10 AM
Yea the circuit is just a generic overview the details need worked out.
I will take it to a whole new level soon 

I don't think that the resistor helps.  If I understand your intent you want the input side to open so that when it swings negative the coupled winding on top will draw energy from the environment.  Is that right?  Then you need something that limits the voltage excursion that doesn't waste all the energy taken from the battery to magnetize the inductor when the left hand switch is closed.

Drawing from the ambient and not the power supply.

http://cdn.makeagif.com/media/8-22-2014/YyG6O9.gif

Dave, I figured that was the idea.  However, again:  When the left switch opens, the left hand side of the inductor swings negatively drawing current from parasitic capacitance which quickly develops a rapidly increasing negative voltage.  How do you plan to keep the lower winding from swing so low that it destroys the switching transistor?