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DC12V 4-Wire PWM PC Fan Temperature Control Manumotive Fan Speed Controller Module CPU High-Temperature Alarm With Buzzer With NTC 3950 Thermistor - Rytronics.in
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Adafruit EMC2101 I2C PC Fan Controller and Temperature Sensor [STEMMA QT / Qwiic] : ID 4808 : $5.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: PC Fan Governor, PC Fan Speed Governor, 4-Wire Pwm Fan Controller Manual Speed Regulation Fan Speed Controller with Buzzer for Computer : Electronics
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Fan Control Temperature Speed | Controller Governor | Speed Regulator | Control Switch - Motor Controller - Aliexpress
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Controlling a 4-wired fan PWM Signal using Arduino allows only two settings - Electrical Engineering Stack Exchange
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Project] Arduino-based fan controller (4 fans) with support for automatic/manual control and speed display : r/hardware
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