Mini Project Onkar Deshmukh Sarang Gadhave Sheshanarayan Dhakane Group : Onkar Deshmukh Sarang Gadhave Sheshanarayan Dhakane Ankush Jaybhaye

Visitor Counter And Automatic Room Power Control

Introduction In todays world there is great need of automating the things. As the world has become faster and closer, the SMART work is always appretiated. So here we have made an attempt be the instrument for such a particular kind of need “Visitor Counter and Automatic Room Power Control ”

Objectives  The objective of the project is to prepare a system which will Count the number of persons entering the room. Count the number of persons leaving the room. Switch OFF the Power if no one inside the Room. Switch ON the Power Suppy even if a single person is inside the Room.

Assumptions There is only one door for enter and exit. Two persons cannot enter simultaneously As the ‘ir sensors’ are used it can count the object as well as the persons. But in our case we assume that only persons are entering the room.

Block Diagram

Block Diagram Description This system basically consist of two Ir sensors , one lcd 16x2, 2 relay, a led interfaced with microcontroller 89s52. In this system, one Ir sensor is used to count the number of people getting in to the room , which is placed at the entrance . Other Ir sensor is used to count number of people going out of room and is placed at the exit of the room. With each person getting inside the complex, the Ir1 sensor will increase the number of count indicating the number of people present inside the complex at the respective time period. With each person going out of the complex, the Ir2 sensor will decrease the count, maintaining the present strength of the people inside complex. With each count the relay will switch on the Power and supply will start. Lcd is used to show the count value of the present human beings.

Switch OFF Power Supply Operation Flowchart start microcontroller Enter Sensor Exit Sensor Check if count=1 Check if count=0 Yes No Yes No Switch ON Power Supply No Change Switch OFF Power Supply No Change

Circuit Diagram

PROGRAM LOGIC DESCRIPTION Enter: As per the program logic (downloaded in the microcontroller), when the first person enters the room the IR 1 detects it. Then the person passes through the IR2 sensor which detects it. The microcontroller checks whether it is first detected by IR1. If yes then increment the count by 1. If no then it remains in the loop and no change.

Program Logic Description Exit As per the program logic (downloaded in the microcontroller), when the first person Exits the room the IR 2 detects it. Then the person passes through IR1 sensor which detects it. The microcontroller checks whether it was first detected by IR2. If yes then decrement the count by 1. If no then it remains in loop and no change. Power Supply Switching When the first person enters the room immediately the count increases by 1(initially 0). Thus the command goes to the microcontroller to switch ON the Relay. Thus the Relay controls the main Power Supply Switch. Similarly, When all the persons inside the room Exit or if no one is in the room(i.e count=0) then the microcontroller again gives the command to the Relay to switch OFF.  Thus the objectives of the project are satisfied.

Component Specification Qty Rate Cost   ( Rs.) (Rs.) Diodes 1N4007 4 8 Microcontroller AT 89c52 1 70 Capacitors 33pf ceramic 5 0.5 4.5 - 104 ceramic 103 ceramic Resistors 15 20 Crystal 11.0592Mhz 2 16 Connectors(32pins) 32 Ir sensors 5cm range 25 50 mountings 40 pin 10 heat sinks 4*3 PCB 3 350 Multistrand Wire 2 meters 9/meter 18 Voltage Regulator 7805 Relay 12 Vdc 30 120 LCD 16*2 180 Transformer 15 Vac , 500ma 80 Regulator Relimate 2 pin 4 pin Tie Cables 8 cm 1 pack Out fittings chassy,nuts, 270 Bolts, screws. TOTAL COST 1378/-

APPLICATIONS, ADVANTAGES & DISADVANTAGES For counting purposes For automatic room light control   Advantages Low cost Easy to use Implement in single door Automation and no requirement of separate monitoring Disadvantages It is used only when one single person cuts the rays of the sensor hence it cannot be used when two person cross simultaneously.

Looking into the Future By using this circuit and proper power supply we can implement various applications Such as fans, tube lights, etc.  By modifying this circuit and using two relays we can achieve a task of opening and closing the door.

The End Thank You