FUNCTION:
when the ambient temperature exceeds the setpoint temp. , the LED is turned off and the relay cut-off the voltage and switches it to the fan/buzzer (optionally)…
after a certain cooling time of sensor , the LED is turned on again (below setpoint temp.), the fan stops.
DATASHEET:
• RESISTOR R1, R2 : 1K
• R3, R4 : 10K
• R5 : 120K
• R6 : 56K
• R7 : 6M8
• CAPACITOR C1, C2 : 100nF
• DIODE D1, D2 : 1N4148
• ZENER DIODE ZD1 : 5V1
• IC SOCKET IC1
• TRANSISTOR T1 : BC547
• SCREW CONNECTOR
• ELECTROLYTIC CAPACITOR C3 : 100µF
• C4 : 470µF
• RELAY RY1 : VR15M121C
• TRIMMER RV1 : 100K
• LED LD1
• SENSOR NTC10K0 (Trigger: 5 to 30 degree celsius approx.)
• IC IC1 : : LM324 or eq.
• FAN dc 12V/0.16A
• ADAPTOR ac/dc input: ac100-240V/output: dc12V
Post time: Jun-21-2017