So I've made a circuit where I want to use generated power to turn on a lightbulb or whatever. I want to have the output turn off immediately when the input stops, but I need a battery in between the input and output to help run the controller and act as a capacitor, but it's causing the light to stay on long after the input has been turned off.
I am thinking of using a relay (probably an automotive one) so that if the input switches on the output (the funky colours in the diagram), but I'm not 100% sure how relays work so I'm afraid most of the current will go into the relay if I just hook it up to the input voltage and blow it up, or lead to large losses. Any examples I've seen for relays have been a small amount of voltage (from an Arduino or something) that switches on a higher voltage so I'm not totally sure about using one in this application. If there are some more electronically inclined people here could you let me know if this is a terrible idea?