I used an LCD shield to display the current temperature and speed of the fan, but you can use the circuit without the LCD display. You also need to select the transistor by the type of fan that you ...

This is the type of thing you could throw together with a microcontroller hobby board (i.e. Arduino and the related diaspora), a couple temp sensors (whether thermistors on analog pins or I2C temp ...

In this project, we automate a heat exchange fan using a thermostat-based control system. Perfect for improving energy ...