Monitoring System using AT89C51

Intercoms and calling bells are only suitable for luxurious hotels, lodges, and high-class buildings. In small vicinities like small hotels, offices, and clinics, they are not the correct options for communication between the working/assisting staff and people. This is primarily due to the cost and the limitation of being able to provide this feature for only a limited number of points.

Here’s a simple and economical room-monitoring system that provides audio-visual identification of the call point. Additionally, the system also offers feedback to the caller in the form of a busy signal. By using minimal hardware and software, this project offers a clean and easy method of communication.