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This control system is used to keep a greenhouse warm in the Winter. It keeps the temperature of the greenhouse above 20°C. If the temperature drops below 20°C then a heater is turned on to warm the greenhouse up.
The important components of this system are :
Input and Output Devices
The control system has these input and output devices :
| Input Devices | Output Devices |
| Temperature Sensor | Heater |
Flowchart
The operation of the system is described by this flowchart :
GCSE ICT Companion 04 - (C) P Meakin 2004