Lighting and LED with a capacitor- the ins and outs.? Answered
I'm looking to light an LED with a charged capacitor for a decent amount of time, but we haven't quite gotten to that point in my circuits class.
What all do I need to know? Just how does the capacitance relate to the amount of time the LED will stay lit? What about voltage? How do I avoid killing my LEDs?
I'm fairly proficient with the book knowledge part of capacitors, the RC time constant, ect. so feel free to use these when answering if need be,
I've seen this instructable here, and saw that he had some pretty big capacitors. Two 220 F in series, to be exact. That's 40 USD worth of parts. I know I can combine capacitor in parallel to increase capacitance, but how will this affect other things, such as voltage output and disharcharge time?