The Arduino, on the other hand ... The project is equipped with a DHT11 sensor to read the room's temperature and an LCD to display this temperature reading and the speed the motor is currently ...

The LM35 temperature sensor and red led are powered with 5V from the Arduino board. As you can see in the sketch on the first line I included the LiquidCrystal library (header) that includes useful ...

Temperature and humidity measurements are ... He decided to take an in-depth look at the DHT11 sensor; which you can get your hands on for under $3 if you know where to look.