After construction, enclose the circuit in a small plastic box. Drill a 5mm hole in the centre of the enclosure and fit the LED in a suitable LED holder in the 5mm hole. Finally fit a supply input ...
A flashing LED signals the necessity to water a plant, 3V powered circuit This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is ...
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