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The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...
About a year ago I paid about EUR 20 for a WDD35 potentiometer with a linearity of 0.5%. It looks quite beautiful on the inside, with ball bearings and conductive plastic track which is milled to ...
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