the circuit of the temperature controller(14)

Published:2011/6/28 8:11:00 Author:Ariel Wang | Keyword: temperature controller | From:SeekIC

RP is used to set the middle temperature.RT is used to detect the environment temperature.When the environment temperature is lower than the temperature set by RP,the resistence of RT increases.The pin-2 of IC1 outputs high level.Pin-12 and pin-11 output low level.VL2 and VL1 are lighted.It indicates the environment temperature is at a low level.At the same time,V1 is conducted.The relay K1 is conducted to pull in.The normally open contact is connected.The electric heater EH is conducted to work.It starts to heat.When the environment temperature rises to the temperature set by RP,the pin-11 of IC2 outputs high level.VL1 dies out.V1 is stopped.K1 is released.EH stops heating.At the same time,the pin-12 of IC1 outputs low level.VL2 is lighted.It indicates the environment temperature is the set temperature.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Automotive_Circuit/the_circuit_of_the_temperature_controller14.html

Print this Page | Comments | Reading(3)