Automatic room temperature controlled fan using arduino uno microcontroller. Arduino Uno Arduino Mega Has an EPROM of 1 KB Has an EPROM of 4 KB Has an SRAM of 2 KB Has an SRAM of 8 KB Has an Flash memory of 32 KB Has an Flash memory of 256 KB Has 1 UART (Universal Asynchronous Receiver and Transmitter) Has 4 UART. Jul 1, 2017 - The project 'Temperature Controlled Fan using arduino' is simply fabricated around arduino uno board and temperature sensor LM35.

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. To build the fan, we will use DTH11 Humidity Sensor. The sensor will measure the temperature continuously. 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.

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The temperature along with the speed of the fan will be displayed through LCD monitor.