The water sensor circuit that tells you when your plants need watering. The FloraBlinker is a fun first soldering project that results in a fully functional circuit that can monitor your plants for several years on a single coin cell battery. This unassembled kit comes in a plastic storage box and includes all electronic components, a high quality Printed Circuit Board, a circuit diagram, parts list, and battery. The only tools needed for assembly are solder and a soldering iron. Free classroom delivery.
This an open source hardware project located at: https://github.com/diodelass/florablinker