SpeedFan has been around for years, and it’s still the most widely used software for fan control. This is one of the free utilities that give you more advanced control over your CPU fans. Fans run on 12V, not 5V and you may need a pull-up to +5V on the Green RPM sense wire. SpeedFan If your computer’s BIOS doesn’t allow you to adjust the blower speed, you can choose to go with a speed fan. The dual tower heatsink covers more surface area. The 120 mm SERVO fan, seven Copper Heatpipes Air Cooler is designed to keep the AMD’s 2nd Generation Ryzen Threadripper CPUs cool under any computing condition. The loop() will start the fan at full RPM and then gradually decrease it while constantly reporting the RPM. The Wraith Ripper is a product developed through an exclusive collaboration between Cooler Master and AMD. You set OCR2B to a value from 0 to 79 to set the PWM duty cycle. You connect the Blue fan CONTROL wire to Pin 3 and the Green SENSE wire to pin 11. OCR2B = 79 // duty cycle for Pin 3 (0-79) generates 1 500nS pulse even when 0 :( OCR2A = 79 // 79 TOP DO NOT CHANGE, SETS PWM PULSE RATE Set TOP and initialize duty cycle to zero(0) TCCR2B = 0x0C //0x0A WGM21, prescaler = /8 Performance Tuning is AMD’s groundbreaking tweaking and overclocking tool that allows gamers to overclock or undervolt their GPU, controlling both engine and memory clocks, as well as adjusting fan speeds to their desired setting. PinMode(PWMPin, OUTPUT) // OCR2B sets duty cycle generate 25kHz PWM pulse rate on Pin 3 It will PWM a fan at exactly 25kHz and run a sample showing how to read the fan RPM and print it out: const int PWMPin = 3 You d have to change the Arduinos PWM frequency to control the fan this way or write a custom PWM function into the sketch.ĭepends on what the OP needs, for example, for manual control connect a pot to A0 and use that to control the PWM (Fan Speed) Control wire PWM Frequency: Target frequency 25 kHz,acceptable operational range 21 kHz to 28 kHz
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