terryking228:
What is going on for the user here?? Is it something like a heart rate monitor??
Actually, I'm making a modern torture device. Just kidding 
I'm making a feedback monitor for joggers. It gives feedback according to how well they're doing in their lapse.
terryking228:
The idea is simple: it's a "Boost Converter" often used in power supplies. See: Boost converter - Wikipedia
I think all you'd need is the inductor and a small transistor to act as the switch.
I've been reading up on inductors and boost converters and it sounds promising. But could you also accomplish this with a capacitor? Just because inductors can get quite large, and (electrolytic) capacitors are usually smaller. Also, for inductors to 'charge' you need AC power, right? How could the arduino generate that? With PWM?