Diy temperature controlled fan using arduino

[@ElectroRetro]

Code :- drive.google.com/file/d/1L_1ppzY5ntrKaL_lm-xtDeN60wLGyvCq/view?usp=drivesdk

[@Toro-Tor]

Using a cap to remove that hissing noise from the fan when its not at 100% PWM = very good idea, THANK YOU ! However, the cap is very much related to each application - You have to experiment with the cap until you find one that takes the noise away but still lets it work on various PWM. If i put a 470uf as suggested, my fan just blows full-speed when its supposed to go half-speed. So now I´m using only 47uf and its perfect for 3 different speeds, no noise. Probably one could determine mathematically which cap is the right one ... but I don´t know how to calculate that

[@ElectroRetro]

👍🏻

[@MRTZ75]

Can i control the pwm with this circuit? Because mine is only turning on and off. I want the fan slowly build up from 25%,50%,75% and 100% duty cycle. When i measure the output with a oscilloscope i get a 25%,50%,75% and 100% duty cyle but the fans are not moving untill they reach 96% dutycyle. I use a 2 wired 24 fan

[@ElectroRetro]

U can adjust that in code

[@MRTZ75]

@@ElectroRetro I adjusted the code but still not working. For example room temp i want it to spin with 50% but the fans is not spinning. Only when i adjust the fan speed to 96% pwm then the fan starts spinning

[@nicholasn.sulaksana8662]

@@MRTZ75 should be in PWM pin. On Arduino Uno, the PWM pins are 3, 5, 6, 9, 10, and 11. The PWM pins are labeled with ~ sign.

[@MRTZ75]

@@nicholasn.sulaksana8662 it was the fan. My fan wasn't pwm compatible. Every fan manufacturer is different. By changing my fan the circuit worked :)

[@hwj2648]

@@MRTZ75 are you using 24v fan? and all other components are the same as Electro Retro listed? thank you

[@jonny11bonk]

So I have put a capacitor between the fan + and -. Can something happen to the capacitor if I leave the fan at the full speed for long?I want to make a controller for my PC case fans.

[@ElectroRetro]

No problem

[@jonny11bonk]

@@ElectroRetro Oh okay, thank you!

[@abanki9595]

what if I use a 24v fan and power supply? Still same components work.

[@ElectroRetro]

Yes

[@abanki9595]

Thank you for your immediate response. Is it possible to use this setup for ESP32 dev kit?

[@ElectroRetro]

I didn't try with esp32. I think its possible, you may need to change adc value to 4095 and need calibration.

[@Chris-rs1pp]

hey, im trying this but instead using bc547, im using C1815. is it okay or nay?

[@ElectroRetro]

Yes, You can use C1815 or any npn transistor

[@Chris-rs1pp]

@@ElectroRetro the fan didnt spin at all, the sensors working just fine but the fan doesnt spin. I tried print analogread fan and it showed like what the if condition writes. But it didnt spins. Something wrong or else sir?

[@Chris-rs1pp]

@@ElectroRetro my ntc show value between 100-200 so i modify the code so the fan always full speed if the value of ntc is above 100 but nothing happened

[@ElectroRetro]

Try with a pwm compatible fan

[@Chris-rs1pp]

@@ElectroRetro if i use pwm fan, then which pin i should connect to which wire? like 12v, ground, tach and pwm pin

[@robmormile3911]

is the 470uf cap relative to the current draw of the fan. If so what cap would be needed for 4 fans in parallel at 80mA each (320ma)

[@ElectroRetro]

You can use 470uf capacitor

[@mohamedabdelraheem7164]

at what temp wont the fan work ?

[@hamzaqureshi4615]

The thermosistor I have has 3 wires, how to I wire them?

[@ElectroRetro]

Do you have part number of your thermistor

[@hamzaqureshi4615]

@@ElectroRetro DS18B20

[@ElectroRetro]

Follow this tutorial for DS18B20. randomnerdtutorials.com/guide-for-ds18b20-temperature-sensor-with-arduino/

[@hemanthkumarr6856]

Can u modifi this circuit with button and oled display to set different temp and show temperature

[@hemanthkumarr6856]

kzbin.info/www/bejne/j3qqdn6ipsyBn9U. Is it possible to change the dht11 to your thermostat

[@janexavier9488]

How to give the 12V supply and from where , can you please explain.

[@ElectroRetro]

You can use any 12v dc power Source. example:12v battery,12v adaptor.

[@janexavier9488]

@@ElectroRetro Thank you

[@imzgaming7579]

Noice

[@likeelijah7136]

How sensitive and accurate is the thermistor

[@ElectroRetro]

+/- 1%

[@athuldev5307]

👍👌😁

[@janexavier9488]

Mine is not working can you help me? I checked every connection and coding but still not working?

[@ElectroRetro]

Sure, can you please explain your problem?

[@janexavier9488]

@@ElectroRetro my connection are correct and I even done with my code uploading but the fan is not working i don't know what's wrong

[@ElectroRetro]

Check serial monitor

[@janexavier9488]

@@ElectroRetro Yeah numbers are displaying continuously, what to do next, can you please tell me?

[@ElectroRetro]

Is it displaying 640 to 750 values?

[@landavid3363]

Im alrdy follow exactly what you did in this video but also cant coding the arduino.

[@ElectroRetro]

What the problem? pls explain.

[@landavid3363]

@@ElectroRetro just unable to coding. idk why. i alrdy do the same thing that u do in your video but unable to coding.

[@ElectroRetro]

What's the error showing in arduino ide?

[@landavid3363]

@@ElectroRetro "Avrdude: stk500_recv():programmer is not responding Avrdude:stk_500_getsync() attempt 10 of 10: not in sync: resp=0xf1"

[@ElectroRetro]

If you are using arduino nano then change processor to atmega328p(old bootloader) maybe it will work. Tools>processor>atmega328p(old bootloader

[@kaushikpatel5379]

It not work help me

[@ElectroRetro]

What's the problem?

[@kaushikpatel5379]

This work without arduino

[@ElectroRetro]

No

[@badhonlab]

i didn't finde code please help me

[@ElectroRetro]

Code :- www.mediafire.com/file/xrf43cojzjz554k/tem_controlled_fan.ino/file

[@LegeFles]

2 songs at the same time......

[@ElectroRetro]

😅