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projects:cabinet-fan-controller [2019/03/09 11:50] (current)
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 +====== Fan Controller for server cabinet ======
  
 +For noise, dust, and space reasons I moved my servers into a custom cabinet but I needed some way to remove the hot air. I could just attach a fan attached to a constant power source but even the best fans are a little noisy at full blast and it doesn'​t need to be most of the time.
 +
 +The optimal temperature range for the cabinet is between 68 and 71 degrees Fahrenheit.
 +
 +__The code lives on the chip which is running micropython. ​
 +Connect it and download/​edit the code if you need to change it.__
 +
 +
 +====== Notes ======
 +
 +**Read PWM**
 +
 +  * https://​gist.github.com/​rxseger/​2b27e661221b6f350b859d13f256cf29
 +  * https://​www.raspberrypi.org/​forums/​viewtopic.php?​t=108066
 +
 +**Fan control**
 +
 +  * https://​www.raspberrypi.org/​forums/​viewtopic.php?​t=84641
 +  * https://​raspberrypi.stackexchange.com/​questions/​53854/​driving-pwm-output-frequency
 +  * https://​www.raspberrypi.org/​forums/​viewtopic.php?​t=184386
 +
 +**Other**
 +  * https://​noctua.at/​media/​wysiwyg/​Noctua_PWM_specifications_white_paper.pdf