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In This Post We Study About A Automatic Fan Speed Regulator Circuit For Controlling The Temperature Of Heatsink An Projects Synthesizer Diy 2005 Nissan Maxima Fuse Box Diagram Sp3t Switch Schematic
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In this circuit pin 3 non inverting terminal of op amp 741 is connected with the potentiometer and pin 2 inverting terminal is connected in between of r2 and rt1 thermistor which is making a voltage divider circuit.
Automatic fan controller circuit diagram. Note that the pcb and layout is not according to the circuit diagram in regards to the hookup of the fans. Connecting wires this project consists of three sections. Circuit diagram of automatic fan controller for active heatsink it is built around op amp lm358 ic1 two mosfets bs170 t1 and t2 a small 12v cooling fan and a few other components.
It is the heart. One senses the temperature by using humidity and temperature sensor namely dht11 second section reads the dht11 sensor module s output and extracts temperature value into a suitable number in celsius scale and control the fan speed by using pwm. Initially in the normal condition the output of the op amp is low as the voltage at non inverting input is lesser than inverting input which makes the npn transistor remains in off condition.
The pcb measures approximately 1 5 x 3 inches 4 8 x 7 6mm if you print the pcb to an inkjet printer it is probably not to scale. For better performance the values of the components can be changed try with different combinations of components and observe the output. Automatic fan controller circuit diagram pc power supply fan is one of the most crucial components to ensure the smooth running of your computer.
A simple and efficient automatic pc fan controller is designed in this circuit. But often or not many of us get annoyed because of the resultant noise and very good overall functionality that makes it a perfect choice for very demanding users. Here is the circuit.
Figure 2 automatic fan controller circuit diagram. Automatic cooling fan controller. This circuit can be used in a pc and the speed of the fan is automatically adjusted according to the temperature of the processor.
As you can see from the circuit diagram lm358 ic1 has two op amps. Here is circuit diagram of automatic temperature controlled dc fan controller. The pin 3 of ic1 1 will be obtained the voltage from pin 6 of ic1 2 in pin 5 and will get vout voltage to compare voltage causes each pin 1 and pin 7 no voltage.
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