This paper presents the designs and the simulation of a DC fan control system based on room temperature using pulse width modulation technique, humidity and temperature sensor namely DHT11 with Arduino Uno Microcontroller. The fan will be used to reduce temperature of a room at certain level. Emblemi klana i ali v l2 video. To build the fan, we will use DTH11 Humidity Sensor. The sensor will measure the temperature continuously.

This review is about arduino based automatic temperature fan speed controller. This project includes Arduino UNO board, temperature sensor IC LM35, a DC Fan, a resistor 1* 1K, 16*2 LCD Display, a power supply and a Diode(1N4007). This arduino based automatic temperature controlled fan project controls the speed of a DC fan by using PWM concept. It uses DHT11 to measure the temperature and by using PWM it decides the speed.

When the temperature gets higher from a specific temperature, the fan will be on “On” mode. The speed of the fan will be determined by pwm using pulse-width modulation. The temperature along with the speed of the fan will be displayed through LCD monitor.