Google “micro power boost converter”
Plenty out there that run on fumes.
Probably not easy to get those parts.
I found out a lot of good info.
They do run on fumes.
You’re right! Not easy to get, specially if you are broke.
Why a super cap.
It’s internal resistance is worse than a normal cap (e.g. 3300uF/6.3volt).
I tried a super cap and now I see it is a bad idea. Yes, the internal resistance is no bueno. I tried it with a 3200uF/6.3volt cap and it was way better. I manually pulsed a 5v boost converter and it lid up and charge the battery for around 500ms. Waited another 5 to 10 seconds to do another pulse and so on. It was a fun experiment, possibly a solution if all else fails.
If you haven’t got the skills to design a switching boost converter with inductor, try a Cmos 555 with a schottky diode voltage doubler or tripler. That should work from <=2volts.
A switching boost converter with an inductor? Like a Joule Thief? Feeding from the cap pushing whatever it can to the battery? How would I trigger the booster circuit when cap is almost full?
Also, can a 555 work with such current?
I made a comment about this but I’m 99% sure I know so little to know that I do not know enough about it.
Would you be so kind to provide more information about it and everything else? Sounds promising if it operates under 2.01v
Thank you for taking time to respond!