I used a fan to control the temperature of a room. When the LM34 temperature sensor gets above a set temperature recorded on the Arduino Duemilanove, it will do two things. One, it will activate the solid state relay and this will turn on the fan from the external power source. Secondly, it will log the time and store it on an internal stack on the micro-conroller. When the fan is turned on this will be signaled by a LED turning on. You will be able to cycle through the last three times the fan was activated by pressing a button connected to the micro-controller and this will be shown on the LCD screen.
Post time: Jun-21-2017