I designed this circuit to control the temperature of heat exchange chamber in order to maintain a constant temperature predetermined by the user. When the hot or cold air enters the chamber either the heater or the fan starts to bring the final temperature to the desired level. Once the heat exchange is complete and the final desired temperature is accomplished either the fan or the heater is inhibited until the next temperature disturbance cycle. Both the Fahrenheit and Celsius degrees can be dealt with. The temperature is/can be set for minimum, maximum, and hysteresis break points. This will minimize the inductive in-rush currents that may damage any control system components. Any further features or controls can be added to tailor the need of that specific application.
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Post time: Aug-01-2017