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Abstract
Our proposed device will be designed to sense the temperature, humidity and light
intensity within a greenhouse and will indicate and control these parameters. In order to
gather the data to control these variables, temperature, humidity and light sensors will
be placed within the structure. Analog and discrete signals will be sent to the control
software (LabVIEW) where indication of temperature, humidity and light intensity will be
displayed. Outputs from the control software will activate devices designated to maintain
desired levels of atmospheric temperature, relative humidity and lighting. Temperature
will be controlled by a fan and a heater. Humidity will be controlled by a watering system
that includes an electrically controlled valve. A flow indication will also be observed on
the graphic interface to alert the user when plants are in the process of being watered.
Lighting will be maintained by a 20 watt bulb and a 100 watt bulb that will illuminate the
greenhouse in varying degrees depending upon data received from photocells.
