IceHardware.net showing you how to build an intelligent fan baybus using an LCD to set different fan level set points.
This circuit allows you to set two temperature thresholds using the switches on the front, a 'high' threshold and a 'low' threshold. When the temperature detected by the probe displayed on the LCD is below the lower threshold the fans are completely off. When the temperature is above the lower but below the higher threshold the fans are at 5v (or any other voltage you desire - explained later). When the temperature is above both the thresholds the fans are running at 12vRead more
