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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They are specified by their fixed value resistance.

Because at that interesting about digital circuits, need a constant 5V 1A fixed power supply. This project helps us to control the light, fan, and home appliance automatically and counts the number of persons entering and leaving the room by modifying this circuit and using four relays we can achieve a task of opening and closing the door and can be implemented to every high voltage controllable appliance which has to automated by sensing. If we consider an office or a conference hall or any other room, we need to turn on the lights whenever anybody enters the room.

A microcontroller can be considered a self-contained system with a processor, memory and peripherals and can be used as an embedded system. For example, a general purpose processor might require several instructions to test a bit in a register and branch if the bit is set, where a micro-controller could have a single instruction to provide that commonly required function.

Maximum current draw is 50 mA.

Microcontroller (AT89C51) based Digital Visitor Counter Project

Pin Description of Chapter 2 explains the power supply used in this project. In this LCD each character is displayed in 5×7 pixel matrix. The main areas are sensing and remote controls. I want to buy one ditital ,Soalr tracking system,so, what is the total cost snd conter procedure.


The device operates between 1. Possible interrupt sources are device dependent, and often include events such as an internal timer overflow, completing an analog to digital conversion, a logic level change on an input such as from a button being pressed, and data received on a communication link. The Arduino board comes with either 1 of 2 microcontroller chips, the Atmega or the Atmega 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.

LED display placed outside the room displays this value microcontrolker person count. The input voltage to the Arduino board when it’s using an external power source as opposed to 5 volts from the USB connection or another regulated power source. That means counter will be incremented bazed person enters the room.

When the relay is activated, the circuit disconnects. And it contains following blocks: This makes the USB a plug-and-play interface between a computer and add-on devices. Of these 2, the Atmega is the upgraded, more advanced chip. It consists of a fixed resistance track having connections at both ends and a sliding contact, called microcontrolldr, which moves along this track by turning the spindle.

By modifying this circuit and using two relays we can achieve a task of opening and closing the door. Typically microcontroller programs must fit in the available on-chip memory, since it would be costly to provide a system with external, expandable memory.

Similarly, they are used to bawed high current circuits with the help of low current signals. A micro-controller instruction set usually has many instructions intended for bit manipulation bit-wise operations to make control programs more compact.

The Micro-controller does the above job. Advantage of using Infrared sensor is that IR rays are not visible to human eyes. To overcome this problem, the camera on a cellphone can be used.


Bytes are sent as a single character read: Energized Relay ON 4. The sensor inputs are defined as up and down selector modes for the counter in the code. SPI Module of Arduino. It does not work through IC, before our hero, for to control a stable 12V voltage with can prevent also a short circuit.

Automatic bidirectional visitor counter using 8051 microcontroller (AT89C51)

Programmable memory also reduces the lead time required for deployment of a new product. They, along with IR receivers, are commonly used as sensors. There are Eight 8 Data pins Figure 5. A small control coil is connected onto the control circuit. bases

This circuit divided in three parts: Thus the switches remain open. It can also be used at gates of parking areas and other public places. Take a look at a 4 — pin relay shown below. A transistor, stands for transfer of 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.

By using this circuit and proper power supply we can implement various applications such as fans, tube lights, etc. Recent microcontrollers are often integrated with on-chip debug circuitry that when accessed by an in-circuit emulator via JTAG, allow debugging of the firmware with a debugger. He stood beside us in all the difficult times, and their love has helped us overcome all the failures and successes. Thus the switch plays an important role in the relay working.

Typically these interpreters support interactive programming. This project can be used to count and display the number of visitors entering inside any conference room or seminar hall. This function is implemented using a pair of Infrared sensors.