Uses ambient heat to charge VIBR, which then periodically releases sparks (9 SPRKs per cycle, to be precise). If you prefer a plausible fake-science explanation, it harvests vacuum energy and converts it into usable power. Enjoy!
Comments
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Nice! +1 You actually beated me (as expected)! It would be even nicer if you built an actual uranium reactor and posted the ID in my save :)
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Added batteries to both, based on Vondaniel's design (id:1974175), to make it easier to judge the power output over time.
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Also a non-insulated version, usable without ambient heat (just light a fire under it to charge it!)