Arduino fan controller

Features

• Control fan speeds by using the following modes:
  • Auto: Use temperature->speed curves for each fan
  • Low: All fans sets to their lowest value on the curve (that is not 0)
  • High: All fans to their highest value on the curve (that is not 100)
  • Full: All fans to 100%
• SSD1306 Display:
  • Fan speed control mode
  • Sensor temperature
  • Fan speeds percent (with RPM if tachometer is available)
• Buzzer:
  • When there is no display: beep to transmit control mode and temperature
  • Beep when temperature is critical
• Warning led: Blink when in low speed mode (as temperature may rise)
• Button:
  • Short button press
    • Send control mode, temperatures and fan speeds to serial output
    • Beep first temperature (mix of morse and roman numbers)
      • .: 1, ..: 2, ...: 3, .-: 4, -: 5, -.: 6, -..: 7, -...: 8, .--: 9, --: 0
  • Long button press: Switch fan control modes
    • Auto (beep .-, morse code for A)
    • Low (beep .-.., morse code for L)
    • High (beep ...., morse code for H)
    • Full (beep ..-., morse code for F)

Setup

• Install dependencies
  • On GNU/Linux platforms, execute ./arduino-install-libs.sh
  • On Windows platform, using the Arduino Library manager, install the following libraries:
    • ssd1306 by Alexey Dynda
• Edit config.cpp to configure the different settings:
  • Pinout
  • Sensor list: pin
  • Fan list: pin, speed curve, associated sensor
  • SSD1306 display connection
  • ...

Board

Perfboard design & photos in board/