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Amazon.com: DC 12V 24V 4A 2-Way Adjustable PWM Fan Speed Controller, Automatic PC CPU Case Fan Temperature Control Governor with Sensor Universal for 2 3 4-Wire DC Fan : Electronics
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Converting a PWM-signal to a DC-signal for powering the fan on your aftermarket GPU-cooler – Hedgehog Inventions
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2PCS DC 12V PWM Fan Speed Governor 0%-97% 25KHz Buck Speed Controller for 4Pin Fan - PWM Module(new) - Arduino, Robotics, Raspberry Pi, ESP8266, Learning DIY, Development board ICStation
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Tangxi PWM DC Motor Speed Controller,9-60V 20A 1200W 25KHz Control Switch Motor Speed Regulator 9V 12V 24V 48V 60V for DC Electric Fan: Amazon.com: Industrial & Scientific
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