Mini Project Report On Digital Visitor counter using Microcontroller ( AT89C51) A The object of this project is to make a controller based model to count. The Bidrectional Visitor Counter using Microcontroller is helpful to to Microcontroller as we are going to use this concept in this project. . AT89C51 ( based Microcontroller); Programmer; Push Button. tsofcom/bidirectional-visitor-counter/. Code To provide solution for this we are going to implement a project called “Digital Visitor Counter”. Microcontroller: This is the CPU (central processing unit) of our project.

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Where power consumption is important as in battered devices, interrupts may also wake a microcontroller from a low-power sleep state where the processor is halted until required to projecct something by a peripheral event.

They, along with IR receivers, are commonly used as sensors. The program can be rested by pressing the reset button on the board The notes on this page are for all boards except the Due, which has a different architecture There are three pools of memory in the microcontroller used on AVR-based Arduino boards: The microcontroller visihor often trade operating frequencies and system design flexibility against time-to-market requirements from their customers and overall lower system cost.

Maximum current draw is 50 mA. An IR sensor can measure the heat of an object as well as detects the motion. It consists of a fixed resistance track having connections at both ends and a sliding contact, called wiper, which moves along this track by turning the spindle. The power pins are as follows: Virgin Galactic — Commercial Space Flight. The significant feature of this project is that it detects the entry of visitors from a single door itself. He has always been with us for setting the right priorities in our work, working with a clear goal and focus, and most importantly learned the role of character in directing the proper advancement of science and technology.

This project can be used in seminar halls, classrooms. Advantage of using Infrared sensor counteg that IR rays are not visible to human eyes.


The aim of this project is to count the objects persons entering the room and also switch the led light accordingly.

The input section has a coil which generates magnetic field when a small voltage from an electronic circuit is applied to it. The wavelengths of these regions and their applications are shown below.

Therefore, utilization of these resources for power supply is the best possible way of producing, conserving and renewing energy, which is advantageous as it is pollution free, affordable, and free from environmental impacts. For working principle, I would have permitted to tell simply. One is low voltage application and the other is high voltage.

LCD display placed outside the room displays number of person inside the room.

The data pins of each 7-segment display are connected to port P 2 of the microcontroller AT89C These “mask programmed” parts have the program laid down in the same way as the logic of the chip, at the same time. Partly in response to the existence of the single-chip BasdeIntel developed a computer system on a chip optimized for control applications, baseed Intelwith commercial parts first shipping in In this LCD each character is displayed in 5×7 pixel matrix.

LED display placed outside the room displays this value of person count. In this project, the transmitter section includes an IR sensor, which transmits continuous IR rays to be received by an IR receiver module.

The circuit given here can count numbers from 0 to in up and down modes depending upon the state of the selector. We would like to thank our Director Dr. In the down mode, it can count the number of persons leaving the hall by decrementing the count at exit gate. The diagram shows an inner section diagram of a relay.

Bidirectional Visitor Counter

The voltage regulator IC maintains the output voltage at a constant value. Reference voltage 0 to 5V only for the analog inputs.

Some microcontrollers have environments to aid developing certain types of applications. Help Digial Find new research papers in: The use of field- programmable devices on a microcontroller may allow field update of the firmware or permit late factory revisions to products that have been assembled but not yet shipped. Also known as binary, the Arduino sends these 1s and 0s bits one by one, or Serially.


These bits are sent in the form of Highs 1 and Lows 0. Also IR rays are not affected by any other sources. A byte is composed of 8 bits. This allows a part to be used in a wider variety of applications than if pins had dedicated functions. Here in this circuit we have used two comparators for two sensors LM is used as a comparator.

Microcontroller (AT89C51) based Digital Visitor Counter Project

The Atmega is a very popular microcontroller chip produced by Atmel. BC is an NPN bi-polar junction transistor. There is a built-in LED connected to digital pin For high voltage applications, they are mainly designed to reduce a phenomenon called arcing. When the relay is deactivated, the circuit connects. This version was made in response to a shortage in supply of the through-hole AtmegaP.

And it contains following blocks:. When the relay is activated, the circuit disconnects. Manufacturers have to projject the need to minimize the chip size against additional functionality.

And when number of persons inside the room is zero, power supply inside the room can be cut using a relay interface. The library works with in either 4- or 8-bit mode i.

Automatic bidirectional visitor counter using 8051 microcontroller (AT89C51)

The board can operate on an external supply of 6 to 20 volts. The project is useful in developing countries and this project has a bright future. Bidirectional Visitor Counter Youtube video coming soon Question and answers about this project: When the resistance between the positive supply and the non-inverting input is high then resulting is the non-inverting input less than the inverting input making comparator output as logic low at pin1.

Janardhana Raju, Dean School of Engineering for providing us by means of attaining my cherished goals.

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