In a way, the magic of a soil moisture sensor’s functionality boils down to a simple RC circuit. But of course, in practice there is a bit more to it than that. [rbaron] explains exactly how ...
Recently, I got a Chirp! plant-watering alarm for evaluation from wemakethings. Chirp, designed to be run on a 3-V CR2032 lithium coin cell, is an electronic plant-watering alarm. You put it into the ...
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