RANCANG BANGUN PENGATUR SUHU RUANGAN OTOMATIS BERBASIS MIKROKONTROLER ATMEGA8535 ( SOFTWARE )

The fan is a tool that we usually find in everyday life. It diikarenakan fan is a common tool used to lower the temperature or refrigerate something. However, the current use of the fan can be developed into a cooling device that can be controlled using an electronic device such as a microcontroller. Therefore we need a control system to room temperature in order to create a good temperature in conducting the cooling system. Not just making temperature control, but also made the monitoring system. The data obtained from the LM35 temperature sensor is processed and then displayed in real time in the form of graphs and tables that can be viewed with a computer using an LCD that can show the actual temperature in a room that has been mounted sensor LM35. Microcontroller ATMega8535 used an 8-bit microcontroller that has a high capability and low power, in addition to all the instructions that are executed in a single clock cycle. AVR has 32 general-purpose registers, timer / counters flexible with compare modes, internal interput and power saving mode. ADC and internal PWM. AVR also has in-system programble on-chip flash memory that allows the program to be re-programmed in the system using SPI serial connection. Keywords: fan, temperature, LCD, LM35, real time charts, ATMega853