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 …::A U of A engineering researcher has developed a wireless light switch that could reduce the cost of wiring a house by as much as 50 per cent.

    • ForgotAboutDre@lemmy.world
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      1 year ago

      It’s probably someone in his house. They either think the door bell is too loud or need the batteries for another device.

      • Corkyskog
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        1 year ago

        Ah yes those “other devices”… check the wife’s nightstand