====== 팬 속도 조절하기 =====
====== 팬 속도 얻기 ======
====== 온도 센서 ======
====== 합치기 ======

====== references ======
  *[[http://blog.makezine.com/archive/2010/07/reading_a_pc_fan_speed_with_arduino.html|Reading a PC fan speed with Arduino]]
  *[[http://www.arduino.cc/en/Reference/AttachInterrupt|attachInterrupt]]