the circuit of the constant temperature controller for fish breeding part1

Published:2011/9/12 21:49:00 Author:Ariel Wang | Keyword: constant temperature, controller, fish breeding | From:SeekIC

When the temperature of water is beyond the set temperature,the resistence of RT increases.It delays the time when VU outputs the trigger pulse in unit time.The conduction angle of VT decreases.The working voltage of EH decreases.The temperature of water decreases slowly.When the temperature of water is lower than the set temperature,VU outputs trigger pulse earlier.The conduction angle of VT increases.The working voltage of EH increases.The temperature of water goes up.It goes on and on.The water temperature of fish pool stays normal.



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