henryhanselscott wrote:My solution uses 2 100 farad supercaps in series charged by a 5 volt supply through a diode and a 1 ohm power resistor. The supercaps actually charge to about 4.4 volts because of the diode drop. The supercaps charge feeds a DC boost convertor.
http://www.ebay.com/itm/3-pcs-XL6009-St ... 43c840c37f
http://www.ebay.com/itm/2pcs-New-Origin ... 3cedeb76ad
This combination has made the power to my Rpi brownout proof and is very stable. I am actually using a pic on the setup to signal the pi to start a shutdown procedure in the event that power goes out for more than 10 seconds, I know that that is beyond the scope of what you want.
This solution is most certainly not that.I'm interested in what the endpoint of all those discussions is.
those supercaps seem a bit tiny to be 100F even at 2.7v. Not sure I would trust those guys.
You know, you can put three of them together to get a max of 8v. Then charge it to perhaps 5.5 volts.
I'm not sure if you already know that 2.7v means maximum. you can safely use it at 0.5v or 1v or 2v but not above.