Normal temperature smc fan control12/27/2022 ![]() ![]() ![]() Thermistor is a Resistor whose resistance varies withrespect to Temperature.Negative Temperature Coefficient(NTC) Thermistor, resistanceDecreasesas temperature rises. LM 358 Op amp is used as a Voltage Comparator, it compares two input voltages at pins 2 & 3.The output of LM 358 collects at pin1.īC 548 Transistor is used as a Switch to control Fan.BC 548 is a NPN transistor S.No.ComponentSpecificationQuantit圜ost1Thermistor4.7k1202Resistors4.7k223Potentiometer4.7k184Op AmpLM3581105TransistorBC 548196Motor9 V1307Battery9 V115 ![]() Resistors (4.7k)Op Amp (LM 358) Transistor (BC 548)5V DC Motor 9V DC BatteryNTC Thermistor (4.7k )Potentiometer (4.7k )ĥV DC Motor4.7k NTC 4.7k Resistor9V BatteryOp Amp LM 358Potentiometer It can cool the devices by operating a DC fan when the temperature in its vicinity increases above the preset level.Its operation is fully automatic and turns off when the temperature returns normal. Introduction: Temperature controlled DC fan is a temperature based fan. of E.E.EĬontents:INTRODUCTIONCOMPONENTS REQUIREDTHERMISTOR BEHAVIOURCIRCUIT DIAGRAMWORKINGADVANTAGESAPPLICATIONSRESULT ![]()
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