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19-03-2010, 01:51 AM
Post: #1
Wink person counter and password detector
I want to know the requirements for the project,person counter and password detector.

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22-12-2010, 01:33 PM
Post: #2
Person counter and Password detector
Person counter and Password detector

Abstract:
The concept behind this project is to measure and display the number of persons entering in any room like seminar hall, conference room. LCD display placed outside the room displays this value. And when number of persons inside the room are zero, power supply inside the room can be cut using a relay interface. Second part of project serves the functionality of a door-latch opening using a password entered through keypad. As well as sending this data to a computer through serial port. This module also turn on buzzer if 3 wrong passowords are entered consequently. User can change this password anytime he/she wish using a keypad.    

Description in detail:
This project mainly consist of following blocks
1. Transmitter: We are going to implement the Person counter module using a 2 transmitters and 2 receivers. We are going to use Infra-Red transmitters because infrared beams are not visible to human eyes. Transmitter used are IR LEDs
2. Receiver: We are going to use a Infrared receiver. It is a active low device which means it gives low output when it receives the Infrared rays.
3. Microcontroller: This is the CPU (central processing unit) of our project. We are going to use a microcontroller of 8051 family. The various functions of microcontroller are like
I. Reading the digital input from two infrared receivers and calculate the number of persons from them. II. Sending this data to LCD so that the person operating this project should read the number of persons inside the room. III. Sensing the password using keypad and to check whether it is a correct password or a wrong password and rotate the stepper motor if the password entered is a correct password. IV. Sending the data to the computer using serial port. This data consist of number of persons inside the room and the status of entered password (Correct/wrong)
4. LCD: We are going to use 16x2 alphanumeric Liquid Crystal Display (LCD) which means it can display alphabets along with numbers on 2 lines each containing 16 characters.
5. PC Interfacing: We are going to use max 232 IC for pc interfacing, the values of number of persons inside the room and the status of entered password (Correct/wrong) will be sent to pc.
6. Keypad: User will enter the password using the keypad. Various keys of keypad are as following,
I. 0 to 9
II. Enter
III. Escape

Application and Advantage:

1. Can be used in various rooms like seminar hall, conference room, and study rooms in college where the capacity of room is limited and should not be exceeded. So the project will display the actual number of persons inside the room.
2. The other part of the project (password detector) can be used to automate the door locking process, so the user need not to carry the door lock keys along with him, he can just remember the password and use it later to open the door

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