Everyone is familiar with the issue of cellphone batteries. They are huge and stupid.
I can't replace that technology, but I started thinking about my own power needs and thought I could do something to fix the huge stupid battery.
Is this an Arduino fix? Possibly. I have a lot of faith in Arduino, and the Arduino community.
My idea is as follows:
3 generators in a circuit with a variable voltage on each one, all stacked together nice and thin. A piezoelectric, a photovoltaic, and a peltier. All of these guys work continuously to feed a secondary battery, 3000mAh therabouts. My thought is that these three generators could all have a diode on their + end. Connected in parallel with an inductor. The inductor would feed into a cheap Lithium Ion battery charging chip. The battery would then power a switch-operated Qi charger embedded in my galaxy S7 case.
Pros: 1. The three generators are thin, stackable, and quirky fun ways to create power. 2. I'll have an extended battery that I can use to keep my phone running longer. 3. The backup battery can charge greenly anywhere.
Cons: 1. None of the methods are reliable ways to harvest a continual power supply of sufficient mojo to charge a 3000 mAh battery. The PV alone would need about 30 sunny days. The Piezo might be more powerful, but only just. 2. Because of the variable voltage on each generator (or almost digital-like for the piezo) I'm out of my depth. I'm used to working with solid, reliable, DC power sources (and one at a time, like our Arduino.)
So how would I put this together? Do I need a rectifier in there? I have an Arduino Uno, and I feel like I might be able to use that somehow?