SenSprout make farming more efficient
Japanese startup SenSprout developed the seed leaf form gadget which could watch water included in the soil. Electronic circuits are printed with conductive ink to a root of this, and measures capacitance included in the soil. An LED light expressing a fluid volume is put on a leaf, and depending on the water level, its color changes to red, blue and green. Farmers can know the fluid volume of the soil by this numerical change.
A power supply necessary to use this is only one size AA battery. They supposes that use in private vegetable gardens and hothouse cultivation. They raised development funds in Crowdfunding site Indiegogo, and achieved the amount of aim in only one day.