August 2008
Beginner to intermediate
304 pages
6h 2m
English
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4.6. PICDEM Temperature Controller
• Specification of temperature controller
• Input and output allocation
• Program outline
The PICDEM mechatronics board will now be used as the hardware platform for a temperature controller. Using a ready-made board eliminates the need for detailed hardware design and should be considered if a suitable product is available at a reasonable cost.
Specification
A temperature controller is required to control a greenhouse or similar outdoor enclosure at a temperature of 25–30°C using electric heaters and a cooling fan.
1. Overall function
• Maintain target temperature within +/−2°C, displaying it on the LCD. If the temperature is within specifications, switch on RunOK indicator; if temperature difference exceeds 5°C, ...
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