Rooting around in the fascinating stuff at the bottom of a draw labelled 'Engineering - Junk Miscellaneous'. Delving amongst the delightful...
An Engineer in Wonderland – Energy harvesting and supercapacitors
I came across a rather good article on using supercapacitors to buffer energy harvesters.
It was written by Pierre Mars of supercap maker CAP-XX, and published in the Journal of Energy Harvesting.
There is plenty about leakage, and even the problems of charging from 0V when the chemistry needs a little kick start, it appears.
It ends with an application circuit including a vibration harvester from Perpetuum.
- Although there is a potential flaw in the circuit, I don’t think a MAX9107 could be used for the two comparators as the chip has a common power pin and the circuit requires them to be fed from two different rails.
A most interesting article.
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