That brings up another important question. Is there such a thing as an accurate capacitance meter that can measure tens of farads? If I were to market this thing, I'd need a way to quality control the actual capacitor value.
I'm going to to have to do a side by side experiment. CW DC at as much CHG current as I can get versus storing small amounts of it faster in a CKT that bursts a higher current pulse into the supercap...
I find it interesting that the low current charger I have can be six volts @ no load but the that supercap pulls that down until it gets up near full voltage. Then it seems that the "load" of the cap itself can hold the low current CHG CKT down around 3 volts. I was surprised to see that...
Then somethings wrong somewhere. With a load of 60mA I get about 4 minutes of power down to about 1.5 volts. With a charge current of 10mA, it takes 24 minutes to charge the cap back to 3 volts...
That's the rub. I can generate up to about six volts at 1 to 4 mA. Takes a long time to charge a supercap like that. I can charge a very large STD cap much quicker but it drains out of juice in seconds at 60 mA and that won't work for this remote sensor application.
Duh... See, I told you guys my sometimers is working! Seems the best I can do in the size I can stand is 1/2 of my present ESR, twice the farads but down to 2.7 volts from the 3 volt part I was using. Mouser instead of Digikey...
I wonder how much impact a few mOhms will make? Using this part: https://www.digikey.com/products/en?keywords=478-11283 I can drain that cap down to .9 volts from fully charged @ 3 volts in about 4 minutes @ 60mA and it takes about 24 minutes to charge it at 10mA... I guess I need to buy a...