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Yes, exactly! :)
Gotta correct myself again here. So the correct average power is 0.2W at 2 mph on flat ground and 0.234W at 8% grade. This is less than your solar panel cap idea you said, but hey it's research!
I agree! In fact that would be one of the applications of this - it's a portable exercise machine! :)
Also, see the note above about my original calculation error in average power. The correct power is, quoted from above:"This harvester can generate an average of 2.0 W of power when you walk at 2 mph (0.9 m/s) on flat ground. 2.84W for a 15% decline. (Note: Originally, I wrote 100 mW/140 mW - apologies for that. My data analysis had an error in it. If you ever make power calculations, make sure you calculate your total power as the integral of [instantaneous power = instantaneous voltage squared / resistance], all divided by the total time interval, NOT the average voltage squared / resistance. :))"
DIY Knee Energy Harvester View Instructable »