1. The problem statement, all variables and given/known data I plan on wiring an emergency flashlight to power an led. It must be able to store charge without batteries, generate charge and create a light. 2. Relevant equations None, at least for now 3. The attempt at a solution I was planning on following this diagram and modifying it to follow the following instructable http://www.instructables.com/id/Rechargeable-flashlight-without-batteries/ The reason I was planning on following that diagram is because the intsructable does not explain the steps as well as I would like nor the end resulting circuit. I am gonna get the parts from scrap electronics so I do not know what the capacitance and such will be, so lets assume I get parts that work together if wired correctly. Could I add in a several capacitors in place of the single capacitor in the diagram and get the same result, and replace the 9 volt with a stepper motor and use a rectifier diode between the capacitor and the resistor. Also could I add mini solar panels into the circuit to charge the capacitors while the led is off or on and how complicated would that be. Also if it is not clear I know virtually nothing about circuit diagrams and electronics so please try to dumb it down for me, and spell out what parts are what if you create a circuit diagram to show me what I could do.