Monitoring the temperature of a room is a critical task to ensure the performance of the server is not disturbed by excessive room temperature or in corporate office or exceed of limit increasing rapidly. In this project, we designed and implemented a microcontroller-based room temperature monitoring system using Atmel ATmega8 microcontroller and National Semiconductor's LM35D temperature sensor. The system is equipped with alarm when temperature goes beyond threshold alarm rings and relay board to control electronic equipment. The experiment results show that our system works as expected. The system raises an alarm and when the room temperature is above threshold, which is 30°C. A Relay will be ON at 51°C and above.
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