Controlling a 4-wired fan PWM Signal using Arduino allows only two settings - Electrical Engineering Stack Exchange
Fan Control Unit with Arduino - Techniccontroller
Arduino PWM pc fan control | arduined.eu
Read fan speed with Arduino
4-Wired Fan Control (PWM) - Hackster.io
REES52 DC 12V 5A PWM 4 Wires PC Fan Temperature Manumotive Speed Controller Module CPU High-Temperature Alarm with Buzzer and Probe for Arduino Heat Sink : Amazon.in: Industrial & Scientific
GitHub - neutor/fanduo: Smart dual PWM fan controller based on Arduino Nano
How to properly control PWM fans with Arduino - Federico Dossena
PWN Fan controller with temp sensing and button override | Arduino Project Hub
Automatic fan speed control circuit by Arduino
Arduino PWM-Fan Control - Automatic and Manually - Hackster.io
How to properly control PWM fans with Arduino - Federico Dossena
How To Control Fan using Arduino UNO - Makerguides.com