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Engineering Projects

Published on Sep 03, 2020


The objective of this project is to control the auditorium and an industrial application depends upon the number of audience in the auditorium. This project makes the automatic auditorium and industries. The fans and light in the auditorium are controlled depends upon the number of audience present in auditorium.


This project is designed with two set of IR transmitter and receiver, signal conditioning unit, micro controller and driver circuit with relays. IR transmitter is the one type of LED which emits infrared rays generally called IR transmitter. One important point is that both IR transmitter and receiver it placed in the straight line to each other.

In our project we are using two set of IT transmitter and receiver. One set of IR Transmitter and receiver is placed in the entrance door another one set is placed after some distance of the first one.

Initially when supply is on, both the two set of IR transmitter transmitting rays to the receiver. When any one audience entered inside the entrance door, he cuts the first and second IR rays; the corresponding signal is given to micro controller through signal conditioning unit.

Now micro controller, increment the one count value. When any one audience goes to the out side of the auditorium, he cuts the second and first IR rays. Now micro controllers decrement the one count value. The corresponding count value is displayed on the LCD display, which is equal to number of audience in present in the auditorium.

In micro controller we have already programmed. Depends upon the number of audience, micro controller activated the relay driver circuit to turn on, turn off the relays. The realy output is directly connected to appliance. Through this way auditorium appliances are controlled automatically depends upon the audience presents in the auditorium.

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