Comment on Researcher has developed, at a cost of less than one dollar, a wireless light switch that runs without batteries, can be installed anywhere on a wall and could reduce the cost of wiring a house by ...

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kozy138@lemm.ee ⁨11⁩ ⁨months⁩ ago

Copper wires are expensive. And you need to house those wires in aluminum pipes. That’s a lot of metal that you no longer need to buy. Especially considering how many light switches in our homes.

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