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Remember the "pavement that generated electricity"? [1] Raised £2.6m by crowdfunding. Turns what they really power is "exciting brand activation". By this they mean something you step on which interrogates your cell phone and ships the identity data off for marketing purposes.

[1] https://pavegen.com/



But you can click on the demo on their website and generate 3 Ws (wouldn’t it be nice if there was a convenient unit for this?) of energy fit each triangle you interact with!


1 Ws is just 1 J (1W = 1J/s). Just for comparison with a more widely used unit, you need 3.6 million J to make one kWh.




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