Refrigerator temperature controller 1

Published:2011/8/5 2:52:00 Author:Ecco | Keyword: Refrigerator temperature controller | From:SeekIC

The refrigerator temperature controller circuit is composed of the temperature detection circuit, trigger and control implementation circuit, and it is shown in Figure 3-74. Temperature detection circuit consists of precision voltage regulator integrated circuit lC3, temperature sensor integrated circuit ICl, operational amplifier integrated circuit IC2 and resistors Rl-R5, potentiometers RPl-RP3. Trigger is composed of AND gate integrated circuit lC4, resistor R6 and light-emitting diodes VLl, VL2. Control implementation circuit is composed of the transistor V, heating / cooling control selector switch S, resistors R7, R8, relay K, light-emitting diodes VL3 and diode VD.



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