How To Make A Automatic Fan Controller Circuit Based on Temperature with UA741 IC | Techeonics

In This video we Will make a simple Circuit to automatically switch ON and control the speed of a fan according to the temperature.

Working: This project uses IC UA741 as a sensor for detecting accurate centigrade temperature. The output voltage of this sensor is linearly proportional to the Celsius (Centigrade) temperature. This sensor uses the fact that, as temperature increases, the voltage across a diode increases at a known rate.

Part List of Automatic Fan Controller :
1) UA741 IC
2) NPN Transistor BC140
3) 4.7k NTC Thermistor

4)4.7k and 47 ohm resistor
5)9V battery or any DC Source
6) 100K or 500k Potentiometer
7) 1N4007 DIODE
8) Breadboard or PCB

Hope you like it.
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[muhammedadil]

Can you add one more option. When power on fan rotate slowly and heat up fan speed gradually increase

[_BGMI_PLAYS]

Sir is ic ki jagah agar main 8051 microcontroller use krunga to mujhe kya kya changes krne pdenge ?

[rajveer..]

Bro what is the resistance of the other resistor 470 ohm or 47 ohm?

[jumanahaseen_]

Can we integrate this into spoon in order to create temperature control smart spoom

[gladyspeu]

How can I connect the circuit using four thermistors?

[robindreamer]

Is it 100k potentiometer? The circuit diagram shows 500k and the listed materials show 10k. I can't seem to run this

[ec-]

Sir, is we can put the buzzer instead of fan

[raghavsamba]

Its not working, do we have ti vary thr 104k pot?

[mujeeburrahman]

What value of thermistor you have used?

[antonyngunjiri]

Circuit diagram and the pdf how can i get them

[likithRoshan-]

It's not working bro i have spent 16 hours in making this 😥

[nileshapsingkar]

bruh description has the wrong transistor mentioned

[fardinrahman]

Can anything will be wrong if i use 10k thermistor instead of 4.7k thermistor?