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Automatic Plant Watering System
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A student investigated how current varies with potential ...
subjects.robertsmyth.tgacademy.org.uk€An automatic circuit to switch a plant watering system on and off. €An automatic circuit to switch an outside light on when it gets dark. €An automatic circuit to switch a heating system on and off. (1) (b) €€€€The ammeter used in the circuit has a very low resistance.
Texas Master Gardener Tips for Hobby Greenhouse Owners
aggie-horticulture.tamu.edu• Automatic vent openers help prevent the greenhouse from overheating and use no electricity; open doors on warm days to aid in air exchange. • Shade cloth is essential in summer months if the greenhouse is situated in full day sun. Without it plants can cook in an overheated greenhouse when temperatures exceed 90 degrees.