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Published on Aug 21, 2023


This project is developed for the users to operate a calling bell automatically with counter.

This project mainly consists of a IR sensor, microcontroller unit and LCD display.

The sensor is connected at the entrance. When any one enters, the sensor senses and sends signal to the microcontroller. The microcontroller sends signal to the calling bell unit through drivers and relays and also to the counter. The counter calculates the number of visitors in the particular day.

The LCD display displays the total number of visitors.

This project is very useful in offices, institutions, houses etc. Since microcontroller is used, the operations are very accurate. This project is very cheap and cost effective.

The microcontroller program is written in assembly language. The microcontroller used is PIC16F73

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