So I decided to build a own fan controller. Because this rack is in my office and I like a quiet working place, the ventilation had to be as quiet as possible.įirst I thought about buying a off-the-shelf product, but then I realised: If this controller does not work as I expect and the fans will spin too fast/loud, this will drive me crazy over time. The ventilation was not optimal and I had to install additional fans. Recently I had the problem some expensive components did overheat in my server rack. The software is a simple, custom written PID controller. On top of the Arduino Uno, there is the Adafruit data logger shield - and on top of that is an Adafruit LCD shield. The MCU is an Arduino Uno, which is powered using a 12V power source. It uses the input from two precise DHT22 based temperature sensors. The fan controller described on this project page, controls one or more PWM controlled 12V PC fans.
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