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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The majority of microcontrollers in use today are embedded in other machinery, such as automobiles, telephones, appliances, and peripherals for computer systems. Used with analog Reference. Two of the pins are for the crystal oscillator. This site uses Akismet to reduce spam.

It can also be used at gates of parking areas and other public places. The command register stores the command instructions given to the LCD. The voltage regulator IC maintains the output voltage at a constant value. As shown, the power source is given to the electromagnet through a control switch and counher contacts to the load. Why you have used Infrared sensors to count the no of persons? Because at that interesting about digital circuits, need a constant 5V 1A fixed power supply.

Thus the relay becomes de-energized and thus in off position.

Microcontroller (AT89C51) based Digital Visitor Counter Project

Internal Guide Head of the Department Mr. Interpreter firmware is microcontrkller available for some microcontrollers. You will get a CD with this project: An ATmega8U2 on the board channels this serial communication over USB and appears as a virtual com port to software on the computer. De-Energized Relay OFF In simple, when a voltage is applied to pin 1, the electromagnet activates, causing a magnetic field to be developed, which goes on to close the pins 2 and 4 causing a closed circuit.


In the future, MRAM could potentially be used in microcontrollers as it has infinite endurance and its incremental semiconductor wafer process cost is relatively low. Maximum is 2, bytes.

Automatic bidirectional visitor counter using microcontroller AT89C 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. SRAM is volatile and will be lost when the power microcoontroller cycled. And it contains following blocks: This magnetic field causes the closing of the pins 2 and 4.

Bidirectional Visitor Counter

The library works with in either 4- or 8-bit mode i. Download Synopsis of the project Description: By this function all the faults during transmission and reception can be detected microcontrokler isolated. Whenever an interruption is observed by the first IR sensorit increments the counter value.

A clock pulse is needed for synchronization so that communication can occur in synchrony between the Atmega chip and a device that it is connected to The chip needs power so 2 of the pins, Vcc and GND, provide it power so that it can operate.

For costing details, please mail us your detailed address then we will reply you with total cost. This switch is controlled by the coil in the control circuit. The problem is, when the first person is entering a room. This pin is connected with VCC. Because it is easy to use, easy to buy, as popular applications, and it is also cheap. Partly in response to the existence of the single-chip TMSIntel developed a computer system on a chip optimized for control applications, the Intelwith commercial parts first shipping in When IR light falls on the photodiode, the resistances and these output voltages, change in proportion to the magnitude of the IR light received.


The LCD back light pins are connected to 5V and ground as shown in the diagram below: In addition to the converters, many embedded microprocessors include a variety of timers as well.

If single gate is used then this project is failed. SPI Module of Arduino. BC is an NPN bi-polar junction transistor. A relay switch can be divided into two parts: This project can be used to count and display the number of visitors entering inside any conference room or seminar hall.

When the operating voltage is applied the relay coil gets energized and the COM changes contact to NO. This allows a part to be used in a wider variety of applications than if pins had dedicated functions. A counter that can change its state in either direction, under control of an up—down selector input, is known as an up—down counter.

The significant feature of this project is that it detects the entry of visitors from a single door microcontriller.