Let us now see hoe this Bidiractional Visitor Counter using Microcontroller actually works. When the system is powered ON, the microcontroller initially initializes the stack pointer and all other variables. It then scans the input pins P2. In other words, ports P2.

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On the other hand, we are also well aware about one of the most using microcontrollers — Microcontroller. It is an 8-bit family microcontroller and is widely used in various devices because it is easy to integrate into a project or build a device around. It is mainly used in energy management, touch screens, automobiles, medical devices, etc. As a result, many electronics engineering students are trying to do their final year projects based on microcontroller. Water Level Controller using Microcontroller : This circuit helps to detect and control the water level in an overhead tank or any other container.

This system monitors the water level of the tank and automatically switches ON the motor whenever tank is empty. Bidirectional Visitor Counter using Microcontroller : The main intention is to design a system wherein the number of persons entering or leaving a room is displayed on a screen.

Stepper Motor Control using Microcontroller : The main principle of this circuit is to rotate the stepper motor step wise at a particular step angle. The ULN IC is used to drive the stepper motor as the controller cannot provide current required by the motor.

Password Based Door Locking System using : This system demonstrates a password based door lock system wherein once the correct code or password is entered, the door is opened and the concerned person is allowed access to the secured area. After some time, the door would close. Again if another person arrives and fails to enter the correct password, the door would remain closed, denying access to the person. We can use it at schools, colleges, games, etc. We use LCD display for the messages for more interactive way to operate the system or displaying error messages etc.

Digital Voltmeter using Microcontroller : This is a simple digital voltmeter circuit designed using microcontroller and is mainly used to directly display the voltage in digits with the help of analog to digital converter. Ultrasonic Rangefinder using : This circuit explains you how to measure the distance using microcontroller.

This ultrasonic range finder system measures the distance up to 2. The circuit works on the principle of IR communication. Celsius Scale Thermometer using : This circuit works on the principle of analog to digital conversion. This article demonstrates the design, development and operation of the Celsius scale thermometer using LM35 and microcontroller AT89C This circuit can be used at applications where flashing of light is required, as in beacon flashing.

Interfacing Segment Display to Microcontroller : This article describes you how to interface seven segments to AT89C51 microcontroller. This system displays the digits from 0 to 9 continuously with a predefined delay. It is mainly used to measure value of a reactive element like a capacitor or an inductor.

Commonly, used LEDs will have voltage drop of 1. This is applied through the output pin of the micro controller. DC Motor Interfacing with Microcontroller : Here is a simple but very useful circuit in our real life named interfacing DC motor with microcontroller.

Delay using Timers : In this project a precise time delay is produced for blinking LEDs at a particular rate using internal timer of the microcontroller. This project compares both simulation and hardware implemented results for analyzing the delay concept.

Wireless message Communication between Two Computers : This project helps to enable the wireless communication between two PCs with highly secured encrypted data using Zigbee technology. Microcontroller based unit along with PC and Zigbee module at both transmission end and receiver end enables the two way communication between the PCs.

Wireless Electronic Notice Board using GSM : This project uses microcontroller as central processing unit to display the message on LCD which resembles the real-time electronic notice board.

This robotic vehicle can be controlled remotely using RF communication technology. This location information is transferred to the remote mobile via GSM module. This project is constructed with the use of basic microcontroller.

Underground Cable Fault Distance Locator : The aim of this project is to determine the exact location of the fault by implementing the concept of Ohms law. TV Remote Operated Domestic Appliances Control : In this project, a TV remote is used as remote controller for operating the electrical loads such as fans, bulbs and other home appliances.

IR receiver with microcontroller receives the RC5 code sent from the TV remote and accordingly switches the loads. Intelligent Traffic Light Control System using Microcontroller : This project replaces the conventional timer based traffic light control system by using IR sensors and microcontroller.

This cost-effective system controls the traffic light depends on the presence of vehicles including emergency vehicles. Smart Phone Based Home Appliance Control : The objective of this project is to control the household appliances from user touch screen based mobile. A Bluetooth module attached with the microcontroller unit receives the control commands from user smart phone and accordingly switches the home appliances.

Temperature controlled Fan using microcontroller : This project deals with controlling of fan speed depends on the temperature.

This system uses temperature sensor to acquire temperature data via ADC. The microcontroller gets the temperature data, compares it with set limit values and controls the fan speed by sending control commands to the triggering circuit of TRIAC.

The microcontroller reads the RFID tag of each vehicle detects the vehicle information and deducts the amount at the toll gates. A Smart Anti-theft System for Vehicle Security : The purpose of this project is to implement an anti-vehicle theft control system by using microcontroller along with GSM module. In this, Bluetooth is used as interface between robot and android. Robotic vehicle controller is implemented by microcontroller which directs the robot in desired path by receiving signals from Bluetooth module.

The ADC is interfaced with microcontroller to set position of step-angle of the motor. This design gives the accurate control of motor by properly programming the microcontroller. This output has large number of switching states and reduced low order harmonic components. Sun Tracking System using Microcontroller : This system maximizes the output power from the solar panel using microcontroller with LDR and stepper motor.

This project achieves the accurate tracking of the sun which continuously senses the light and accordingly controls the stepper motor so that PV panel is positioned towards maximum sunlight.

Stopwatch using Microcontroller : The purpose of this project is to build a simple stopwatch using microcontroller that gives the time elapsed between two events. This project uses , seven segment display, Pushbuttons and buzzer as primary components.

In this, RFID tag is given to the every student which consists of basic information of the student. RFID reader along with microcontroller unit reads the data and compares with stored data.

Further microcontroller logs the attendance data in the PC. Designing a Microcontroller Based Temperature Data Logger : This project implements an embedded instrument which records the temperature data over a period of time. This data logger continuously monitors and records the temperature data over a period of time which will be useful for analyzing the results for future course of actions.

In this design, switches are provided in the circuit to control the desired speed. These sensors are placed at two different points so that vehicle travel time between these two points determines the vehicle speed. Microcontroller is used as heart of this circuit which measures the speed in RPM by receiving signals from IR sensors.

Street Light Automatic Intensity Controller : The main aim of this project is to save the energy of street lights by reducing their intensity gradually from peak hours to late nights.

In this, set of LEDs are connected to the control circuit which resembles real-time street lights. Flood Intimation using Zigbee and GSM for Railways : This project is designed to detect the floods on the railway tracks using level and flood water sensors.

Solar Based Automatic Irrigation System : This project combines solar tracking system and automatic water pumping system for achieving solar based irrigation system. LDR sensor senses the sunlight and gives the input signal to the microcontroller. Depends the intensity, microcontroller adjust the solar panel direction towards the sun.

Also, soil moisture sensor detects the moisture content and gives the input signal to the microcontroller which further switches the pump. Seven-Segment Based Alarm Clock Using Microcontroller : This project aims to design an alarm clock which awakes or reminds the user about something by generating alarm. A set of switches are attached to microcontroller unit which facilitates to set the alarm or remainder. Microcontroller output drives seven-segment display and buzzer in order to give the time display and alarm respectively.

This data is compared with data stored in the memory and then displays the authorized or unauthorized person message on LCD display. Voice Recognition Wireless Home Automation System Based on Zigbee : The objective of this project is to control the home appliances through voice commands using speech recognition module.

This project consists of transmitter and receiver circuits both of which consists of microcontroller to process the data. Zigbee communication modules are used in these circuits to transmit the data from transmitter to receiver. This GSM module with microcontroller unit continuously measures the energy consumption by the load and records in database. This energy data is further send to the utility companies on request or hourly or monthly.

Microcontroller Based Automatic Door and Visitor Counter : The objective of this project is to implement an automatic door opening system by detecting the human presence besides visitor counter facility. Then the microcontroller sends the control signals to motor driver circuit to operate the door and also it increments the visitor counter display by 1. Automatic Railway Gate Controlling and Signaling : This project controls the traffic lights at railway level crossing and also the level crossing gate operation using IR sensors.

A set of IR sensors along the track at enter and exit points of level crossing gate gives the input to the microcontroller. The microcontroller process these signals and controls the traffic lights and also gate operation. This project uses the space multiplexing principle to display the characters in digital format.

A set of LEDs, microcontroller unit, position encoder and DC motor are the primary components of this design. Microcontroller with real time clock stores the predefined bell timings in memory. Therefore, microcontroller turns the relays to switch the bell for particular bell timings. Automatic Substation Load Shedding and Sharing using Programmable Switching : This project demonstrates the load shedding and sharing in substations using programmable switching. This project uses microcontroller and it is programmed in such a way that it operates in three modes namely set mode, manual mode and auto mode.

In set mode loads are switched according to the given timing set by the user, whereas in auto mode loads are switched at default timings and in manual mode loads are switched according to the user input through GSM or switches. Real Time Water Quality Measurement Using GSM : This project uses microcontroller to measure the water quality by acquiring the data from various sensors like turbidity, pH, conductivity, temperature and total dissolved solid sensors.

All these sensor data is processed and transmitted to the remote mobile via GSM module. Brushless DC Motor Speed Control using Microcontroller : The main aim of this project is to provide effective and precise speed control of BLDC motor using hall position sensor and microcontroller unit. Microcontroller continuously supplies the PWM signals to the motor by comparing desired speed with actual speed sensed by hall sensor.

Microcontroller Based Patient Medicine Reminder System : This project implements the patient medicine remainder system which gives an alarm with medicine name at the stipulated time. First user has to save the details of all medicine names along with allotted time. Then the microcontroller gives an alarm and displays the medicine name on LCD when the particular time for medicine matches with RTC time.


8051 Microcontroller Projects for Engineering Students

Object counter using Object counter using microcontroller. AT89S51 belonging to the family is the microcontroller used here. The can be simply divided into two sections i. The sensor part consists of a ultra bright led with focus , and LDR, opamp LM and the associated passive components. As you know, the resistance of the LDR has an inverse relationship with the intensity of the light falling on it.


Bidirectional Visitor Counter using 8051 Microcontroller



Object counter using 8051



Bidirectional Visitor Counter


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