XLP = Xtreme Low Power.
I've just ordered an AVRISP and want to use it explore the various fuse settings on AVR's to minimise power use.
I would set the fuse for the 128khz internal oscillator. Its about the lowest power clock and can run down to 1.2v (even though the datasheet say 1.8 ).
That's why I was interested in your experiment. I've got lots of those solar panels from old garden lights. You can pick the lights up at recycling centres in the uk for next to nothing.
Unfortunately in the USA not near any major city, its not as easy to get ahold of stuff like that.
I plan to make a garden datalogger that uses only "free power", solar/wind etc..
That is a good idea. Should be no problem with current. The hard part is keeping it running when the sun/wind stops.
Maybe some supercaps?
Yes. This does work. Infact I was getting over a volt of output with a longwire and a germanium diode, and a ground/earth connection.
Unfortunately the current was in the low uA because the nearest significant radio station is 20miles/32km away and even that is only 5kw.
AND i'm fairly sure that if sea-water, lemons and potatoes can be turned into batteries
Certainly. sea-water, lemons and potatos can all be turned into electricity. I find the hardest part is to obtain the zinc electrodes.
FWIW I fish them out of old carbon-zinc batteries but thats a messy and not always successful process.
I literally laughed at that
The biggest current draw is usually something external to the MCU. I find the current draw of the MCU is between 150uA to 750uA depending on voltage, clock, processing etc.