In 1981, Intel Company manufactured the first 8-bit 8051 based microcontroller and it was referred to as MCS-51 (Microcontroller System-51). The components such as ROM, RAM, timer, input/output ports, serial communication, and interrupt logic all are in-built in a controller so that the size of the overall system will be small. When we design a system with the help of a microcontroller, it will be not bulky. So, it can be used in different applications for a specific operation like electronic toys, machine tools, chemical instrumentation, medical instrumentation, personal computer keyboards, etc. This article discusses in detail about 8051 microcontroller projects for engineering students in different fields.
The modern microcontrollers contain three main key components such as a processor core which acts as a brain for the microcontroller, program memory which contains the instruments that tell the brain what to do, and inputs & outputs are used for processing the external data. This 8051 microcontroller can also be used to build different engineering projects based on RFID, GPS, GSM, Android, Robotics, Sensor, Voice-controlled, etc.
8051 Microcontroller Projects
The list of 8051 microcontroller projects for engineering students includes the following.
1). Password-Based Circuit Breaker using 8051 Microcontroller
Generally, electrical accidents to the lineman occurs because of a lack of communication between staff. This password-based circuit breaker project provides the solution to these accidents. Whenever the lineman wants to work with an electrical line, he can switch on and off by using the password.
2). Electronic Voting Machine Using 8051 Microcontroller
The main components used in this project are switches or keys, LCD board, and authority switches. There will be three authority switches the first switch is for voting or counting mode selection, the second switch is for a vote, and the third switch is for clearing the vote.
Whenever we press the key in a voting panel the voting panel will be locked and the user cannot vote again, to unlock the voting panel the government person should have to press the authority switch to unlock the voting panel, once the voting panel is unlocked then the next vote can be given.
3). Ultrasonic Radar System Project 8051based Microcontroller
The main component used in this project is an ultrasonic device that detects every object in the range of 25 centimeters. If there is an object in the range of 25 centimeters then the ultrasonic radar device identifies the objects and shows them on the display as there is an object, if there is no object in the range of 25 centimeters then the display board displays as there is no object. The ultrasonic radar keeps on rotates and detects all the objects. This is a simple explanation of how the project works.
4). DC Motor Speed Control Motor Using 8051based Microcontroller
In this project the seven-segment display, 8051 microcontrollers, step down transformer, voltage regulator, dc motor, and two switches are used, one switch is used to increase the speed and another switch is used to decrease the speed. The speed of the motor increases when the first button is pressed and the speed of the motor decreases when we click the second button.
5). Ultrasonic Range Finder Using 8051 Based Microcontroller
There are many techniques used for finding the distance. In this project, the ultrasonic module is used to find the distance. The maximum range of an ultrasonic sensor is 400cm, if there is any obstacle below 400cms then this sensor senses that obstacle.
6). A Password-Based Door Lock System
The modules required for this project are the keypad, 8051 development board, 8051 microcontrollers, LCD board, relay, and dc motor. Whenever the power supply switch is turned on the LCD board shows the password for the door lock and that will ask you to enter the password. Whenever we click on keys the LCD board shows a star symbol that indicates the microcontroller is reading the value. If the person enters the wrong password LCD board shows the wrong password and the motor will off.
7). Smart Highway Street Light Management System
This is an innovative system that works according to the timings. The street lights work according to the timings for suppose from evening 18:00 to 24:00 the street lights remain switched on in a brighter mode and after 7:00 am the lights will be turned off completely. The LDR system is used in order to detect the darkness and automatically switch on the street lights.
8). Vehicle Movement-Based Street Light using 8051 Microcontroller
This is a system that detects the vehicle and turns on the street lights. This project is very useful for power saving, whenever the car moves on the road the street lights automatically get turned on similarly whenever there are no vehicles on the road then the street lights will be turned off.
9). Temperature Controlled Fan using 8051 Microcontroller
This project is used to control the temperature in a room, when the circuit is powered on the microcontroller displays the current room temperature on the LCD by getting the data continuously from the LM35 IC. The programs are written for the operation such that whenever the temperature reaches 550c the microcontroller will turn on the fan until the temperature drops to 250c and when the temperature reduces and reaches 250c the fan will turn off according to the program which we have written.
10). Water Level Controller using 8051 Microcontroller
This project automatically controls and monitors the water level in the tank. When the tank is empty the dc motor rotates and the LCD board shows that the tank is empty whenever the tank is full the dc motor stops rotating and LCD board shows that the tank is full.
11). Density-Based Traffic Signal System Using Microcontroller
As the number of automobiles is increasing day by day controlling traffic signals became difficult. The existing system changes the signal according to the time delay even when there is no traffic on the other side one should wait for the signal which is waste of time. This project works normally with a time delay and when there is no traffic on one way it automatically gives the priority to that side.
Please refer to this link to know more about 8051 Microcontroller MCQs.
12). Conveyor Belt Object Counter Using 8051 Based Microcontroller
This project can be used in airports where there is a need of counting the objects or it can be used in industries to count the products etc. The objects which are sliding from the conveyor belt will be counted by the seven-segment display and shows how many objects have been passed from the conveyor belt.
13). One-Touch Alarm Women Safety System
This project is used whenever the woman is in danger situation, for suppose if a woman is in danger so she just has to press one button after pressing the button, the message will send to the registered mobile numbers along with the latitude and longitude and alert the person.
14). Wireless Area Load Management Using Xbee Module System
This project consists of two sections first is the transmitter section and the second is the receiver section. The transmitter section is to be placed in the control room from where you can control the area and power supply at a distance of 1km. This is the benefit of using the XBee module like you can control the area from the distance of 1 km
15). Digital Alarm Clock
This project is used to set the alarm, whenever the time will match with which we set the time then the buzzer will sound otherwise the buzzer will not sound. Nowadays we are busy with multiple works, in order to remind you of the things that you have to do at a specific time then this project is very useful at that time.
16). Liquid Level Control Without Any Contact
There are many places where the contact on the liquid is not acceptable but the non-contactable liquid level controller is necessary these days. The water will waste if you forgot to switch off the bore, in order to save the water this project is very useful. The motor will off when the liquid level increases or whenever it reduces a particular level and the motor will turn on whenever the tank is empty. This is how the non-contact liquid level controller works.
17). Digital Voltmeter Using 8051 Microcontroller
Digital voltmeters are more preferred than analog because of the high accuracy and precision. Suppose whenever the ADC input is connected to 5 volts then the LCD board shows 4.90 volts similarly when the analog input is connected to the ground the LCD board shows 0 volts.
Low Light Level Detector Using 8051
In this project, a buzzer will turn on whenever the light level is below the threshold level. This is one of the simple mini projects using 8051 based microcontroller.
18). LPG Leakage Detector With Buzzer Indication
The main component in this project is the LPG detector. Whenever we blow off the flame near the LPG sensor then the sensor detects the LPG gas and the buzzer will be turned on, as long as the leakage is there the buzzer remains. Once the leakage stops then the buzzer will turn off automatically.
19). Automatic Car Parking System
In the automatic car parking system, the LCD board shows how many car parking places are left, for example, the automatic car parking system is programmed with a count of 10 means there are only 10 parking places. The gates will open automatically whenever the car reaches the gate and gates will close once the car enters in and the LCD board.
The LCD will show the counts of how many cars entered in and how many number of car parking places are left. Once all the parking places filled with cars then the LCD boards show there are no parking places are left.
20). 8051 Based Clock For Blind People
This project tells blind people about the current time. It is a very useful project for blind people, whenever the blind person touches the arrows they can sense the current time.
21). DTMF Based Load Control System using 8051
In this project, we have to enable the automatic answering feature in the phone which we connect to the DTMF decoder, once the enable is done that the mobile should be connected to the DTMF decoder. To control the load, the call should be connected to that mobile which we connect to the DTMF decoder since the auto answering feature is already enabled so the call will attend automatically and what we have to do is press the appropriate keys in a dialer to turn on or turn off the corresponding load.
22). LED Scrolling Message Display Using 8051
This project is mostly used in shopping malls, airports, railway stations, theaters, etc. The main component in this project is the LED scrolling display board, whenever we sent the data to the pc that data continuously scrolls on the display board, once we click the restart button the data will be erased and the same data will come after restart also.
23). Automatic Irrigation Water Supply Monitoring And Control System
The components used in this project are an 8051 microcontroller, power supply, 16×2 liquid crystal display, DC motor, soil moisture sensor, and DC motor driver. The soil moisture sensor senses whether the soil is wet or dry. If there is no water in the soil then the buzzer will be turned on automatically which indicates no water in the soil and turns the motor on. The main concept of this project is to supply water to the plants automatically when the soil is dry similarly when the soil is wet then the motor will off automatically.
24). DC Motor Speed And Direction Controller
This project is used to control the dc motor speed and direction. There will be specific buttons to turn on or turn off the motor. The display board shows the status of the DC motor whether the motor is rotating in a clockwise direction or an anti-clockwise direction and it also shows the speed of the motor. There will be a switch which is used to control the dc motor speed.
25). Four Candidates Quiz Buzzer
The main component in this project is the 8051 microcontroller. There will be four separate buttons for the teams, whichever the team will press the button first the bulb and buzzer will on, and after that if any team press the button there will be no effect on the bulbs.
26). Ultrasonic Distance Measurement Using 8051 Microcontroller
This project can be used to measure the distance in any of the given conditions, or if there is a necessity of measuring the distance with a technical appropriation. If you place any object above the ultrasonic it will measure the distance and the measured distance can be displayed on the LCD board.
27). Elevator Controller Using 8051
The elevators are used in many places nowadays for example in airports, railway stations, shopping malls, etc. There will be HEX keypad buttons once the buttons are pressed the seven-segment display indicates the stepper motor rotating and the floors. There will be specific buttons to operate the elevators in clockwise and anti-clockwise directions.
28). Traffic Signal Violation Monitoring Station
This project consists of two units one is a traffic signal unit and another one is a vehicle unit. The entire system is powered from 12 volts which are converted to 5 volts using a 7805 regulator. Once the power is supplied to the system the microcontroller will initialize the peripherals like UART, timer.
When the person trying to jump the traffic signal when there is a stop signal then the system generates a warning sound. The system will send the message to the RTO then the vehicle will be locked by turning on the ignition control relay, once the vehicle owner pays the fine then the RTO will release the vehicle by turning off the ignition control relay
29). Portable Programmable Medication Reminder
This project is a battery-operated one. This system asks to enter the date and time, when the person sets the time and date along with the medicine name the buzzer will on according to that, similarly, the person can set time for many medicines along with the medicine name. The system gives the information to the person saying it is time to take the medicine.
30). Smart Blind Stick using Microcontroller 8051
The main function of this stick is it will detect any oncoming obstacles in front of the visually disabled person. This stick will notify the blind person that there is an obstruction and he or she should take a safer path or should stop. This is a simple explanation of how the stick functions.
31). High Way Speed Checker using 8051
This system is used on highways to detect whether the vehicle speed is high or low. The system consists of two indicators green and red indicator. If the vehicle speed exceeds 120 km/hr then the red indicator and buzzer will be on, similarly, if the vehicle speed is below 120 km/hr then the green led will keep on glow means it indicates there is no danger.
32). 3.2” TFT LCD Plus Touch Screen Based Home Automation using 8051
In this project, a 3.2 inch TFT LCD screen and touch screens are used. The LCD gives RGB colors when the power supply is turned on, first, it gives red, blue, orange, pink, green, light green, white spaces, images, and after that home appliances. All the home appliances are turned on and turned off by touching the specific portion on the touch screen panel.
33). Gas Sensor with 8051
This project can be useful in hotels, restaurants, homes, function halls, canteens, etc. This system gives an indication whenever there is gas leakage. The gas sensor senses whether there is gas leakage or not, if there is a leakage the buzzer will on and alerts the person.
34). Auto Power Supply Control From Four Different Sources
In this project, four different sources are used and there will be four relays for those four different sources. We could able to know from which source the load is connected, for example, the load is coming from the first source suppose if that first source is not available then the load changes to the next source, if all the sources are not available then the load will be switched off.
35). Thyristor Power Control By Ir Sensor
The intensity of the lights increases and decreases by remote. The intensity of the light is very high when we press one number button in a remote, similarly, when we press other buttons the intensity of the light gradually decreases, and finally, when we press the zero button in the remote the light will be turned off.
36). Three-Phase Solid State Relay With Zero Voltage Switching
The circuit in this project is a three-phase circuit in which three lamps are used for three phases. The lamps are randomly switched on in the project and the whole thing will be seen on the CRO whether the lamps start from zero voltage or not. The random switching can be changed to any other value by this process, the system can see whether the lamps are starting at zero voltage or not. Once the last lamp starts at zero voltage the life of the lamp will be highly extended.
37). Integral Cycle Control Ac Power Without Generating Harmonics
The integral cycle control is a method to remove portions of full-cycle or one cycle of an AC signal for controlling the AC power across heater loads or linear loads interface to a programmed microcontroller. This process of power control generates one percent of total harmonic distortion and sixty-one percent of firing angle control methods.
38). Automatic Bell System For Schools And Colleges
This project is designed to operate the electrical bells in schools and colleges automatically. The time will be set an individual number of times corresponding to those timings the bell will ring automatically.
39). Discotheque Lighting Stroboscopic Lamps
The stroboscopic classer is a useful lighting system in a discotheque. In this project, the microcontroller and the number of LED’s are used which are switched on and off at a very fast rate which resembles that a stroboscopic light effect.
40). Beacon Flasher Using Microcontroller And Pulse Width Modulation
This project is about the beacon flasher. The beacon flasher glows on and off when a pulse width modulation is given as input to the flasher using a metal oxide semiconductor field-effect transistor.
41). Auto Metro Train To Shuttle Between Stations
This project is about auto metro trains. The train which is used in this project is a robotic train with sensors at both ends. There will be a counter and sensors for limiting the passengers. The doors will open automatically when the train arrived at to next station and the counter goes on increases when the people enter the train.
The doors will close automatically in a certain predefined time. Once the train reaches the destination the doors will open automatically and it permits the people to go at that time the counter comes to zero after that the doors will be closed automatically with a buzzer sound.
42). Solar-Powered Auto Irrigation System
This project is used to supply water to the plants whenever the soil is dry, if the soil is wet the motors will off automatically. The system which is used in this project is a solar-powered auto irrigation system, in which the irrigation pumps operate with solar energy automatically whenever the soil is dry.
43). Wireless Message Communication Between Two Computers
The project consists of two units and each unit is connected to one computer and whatever the message is typed in one computer that message will be received in the other computer with a buzzer sound. This is how bidirectional communication takes place wirelessly.
44). Flexible AC Transmission By The Static Variable Compensator
The main aim of this project is to improve the transmission line’s power factor by using the static variable compensator. The capacitors used in this project are static capacitors and the other name of the static capacitors is thyristor switch capacitor.
45). Space Vector Pulse Width Modulation
The lamp in the project is a series lamp, the lamp first glows with full intensity and slowly its intensity will fall and the motor will start running. The single-phase supply is given to a lamp and will get a three-phase supply from the space vector that is how the space vector pulse width modulation concept is used for converting the single-phase supply to a three-phase supply.
46). Modern Office Management Tool For Data Transmission To Multiple Users
The technology used in this project is RF technology, and the project shows the working of PC-based communication systems in offices for data transmission to multiple users.
47). Speed Synchronization of Multiple Motors Using Wireless Technology
In this project, multiple motors are used and each motor has a sensing arrangement for the speed by infrared. If we would like to operate a motor at a particular speed we have to press a key in a keypad after that the system asks us to enter the percentage of the RPM that the motor has to run. The main objective of this project is the synchronization of multiple motors using wireless technology. One motor acts as a transmitter and the rest of all the motors act as receivers.
48). Four Quadrant DC Motor Speed Control With Microcontroller
This project is for forwarding the rotation of the motor, reverse rotation of the motor, fast forward break, fast reverse break, and also for speed control. The speed control of the DC motor is control in all four quadrants and it used an 8051 family microcontroller along with a motor driver to drive the motor.
49). Bidirectional Rotation of An Induction Motor Using A Remote Control
This project is a microcontroller-based control of induction motor rotation in either direction. The induction rotates in a clockwise direction and also in an anti-clock direction by remote control.
50). Sending Secret Coded Communication Using RT Technology
This project is a portable and coded wireless message communication between two parties secretly with an LCD at both ends. The messages will be transmitted based on a particular code.
51). Programmable Load Shedding Time Management For The Utility Department
In programmable load shedding time, the management of any on and off time can be programmed through RTC that continuously monitors the time. In this project, the electrical load is operated multiple times based on the predefined program. This system has an inbuilt RTC which tracks the time continuously so that the load switch will be turned on and turned off according to that time.
52). Precise Illumination Control Of The Lamp
This project is about precise illumination control of the lamp. The system’s main objective is to control the lamp illumination as per our requirements with 8051 microcontrollers. When the power is supplied the light will be on with full intensity and the system asks the person to enter the required intensity. The intensity of the light will change depends on the person’s requirement.
53). Controlling Dish Position By A Motor Using The Remote Control
This project gives a brief explanation about how to control the dish position by a motor using the remote control. The position of the dish is changed by remote in 360 degrees. The main objective of this project is to adjust the dish position. Two motors are used in this project to rotate the dish in both horizontal and vertical directions by using the remote control.
54). Automatic Stamp Value Calculator For Post Office
In this project one LED, controller, A/D converter, and some analog values depending on the weight of the letter or packet are used. The arrangement is made with a potentiometer with a spring-loaded lever which would change the analog value on the ADC, in the process the program will take over and indicates exactly how much they charge and what is the weight of the letter or packet. The charge will change based on the weight of the letter or packet.
55). Controlling the Speed of Two-Hhase BLDC Motor Using Fuzzy Logic Control
In this project, the speed of the BLDC motor is controlled by using fuzzy logic control. The motor will operate as per the desired requirement, for example, the motor is rotating at a speed of 10% in order to increase the speed of the motor is more than 10% the person has to press the specific button.
56). Secrecy Maintained In Parallel Connected Telephones
This project is about secrecy maintained in parallel connected telephones by enabling only one user at a time, for example, four telephones are connected to a single line, if any telephone is lifted then the other telephone will automatically get disconnected. This is the project to maintain secrecy for security purposes.
57). Using TV Remote As A Cordless Mouse For The Computer
The project is about using a TV remote as a cordless mouse for the computer. The computer is operated by pressing buttons on a TV remote. In order to operate the computer by a TV remote, the COM port has to be selected, once the COM port is selected will get verification on a screen and the operation will take place. This is how a standard TV remote is to be used to operate a computer.
58). Supervisory Control And Data Acquisition For Remote Industrial Plant
The main aim of this SCADA is to process data acquisition in real-time under supervisory control for a remote industrial plant. The supervisory terminal in a computer terminal reads the temperature, once the setting temperature changes the load will switch on, and accordingly the lamp will switch on for that particular zone.
The data will collect on every temperature on a real-time basis from the day, date, time, everything in a detailed manner. It also has an alarm system, when the temperature for some regions is not controlled the alarm will also turn on automatically.
59). Synchronize Traffic Junction Signaling System
The project is about synchronizing traffic junction signaling using an 8051 microcontroller. When the vehicle keeps on moving from one junction to another junction the green LED will on automatically and at each junction, there will be a microcontroller so each junction is taking care of by a specific microcontroller.
60). Wireless Operated Fire Extinguishers Vehicle With Water Jet Spray
The fire extinguisher vehicle with water jet spray is operated wirelessly. The vehicle can go forward, backward, and also raises the pump nozzle up and down to throw the water when it is necessary. This is how the fire extinguisher vehicle works for the fire extinguisher and throwing water at the desired place remotely operated by RF.
61). Fuzzy Logic Control For A Brushless Dc Motor
The project is about the fuzzy logic control for a brushless dc motor to run at the exactly entered speed. In this project, the closed-loop control technique is used to control the speed of a brushless dc motor.
62). Automatic Surveillance Camera Panning System
The main aim of the project is to control the dc motor speed by using pc. The arrangement is made in a way such that once the system is operated from the hyper terminal then the system will function in the way that the circuit is designed
63). Integrated Energy Management System
The main objective of this project is to send messages for electrical load control that resends an acknowledgment of the status of the load. The load will switch on whenever the message is sent from mobile and the status of the loads like which load is on and off will be is sent to the mobiles automatically.
64). DTMF Technology-Based Door Opening System
This project is about a mobile phone pressed password for a home automation door opening system, the project is based on the DTMF technology. The doors will open and close whenever the person enters the password in a dialer, the doors will open, and close will take place from any distance. It can be used by using the mobile directly at the gate or it can be dialed from a distance to that particular number if the mobile is connected to the system to open and close the doors based on the requirement.
65). Precise Kilometer Calculation Of Underground Cable Fault
The main aim of this project is to detect the location of the cable for repairing it. The project is based on the principle of the resistance of the cable, the ADC provides the distance of the cable. Suppose there are three phases and those three phases will be scanned continuously and give the information whether there is a fault or not in that particular phase. If there is a fault in a particular phase, then the system displays there is a fault in phase at a distance of 2km or 3km.
66). Alternative Current Power Transfer Wirelessly By High Frequency
The objective of this project is to transfer the electrical energy wirelessly for an electrical load from a power source. In this project, the high-frequency transformer is used to transfer power wirelessly.
67). RF-Based Multiple Device Control
The main aim of this project is to control electronic and electrical gadgets using radiofrequency transmission from a remote location. The radio-frequency technology is used in this project to control the multiple devices, instead of infrared a radio-frequency interface is used to avoid the drawbacks of an infrared interface. To turn on or turn off the desired devices the signals are transmitted by a radio-frequency transmitter and the signals are received by a radio frequency receiver.
68). MicrocontrollerBased Tachometer
The main objective of the project microcontroller-based tachometer is to measure the speed. The tachometer is one of the digital transducers which is used to measure the rotating shaft speed.
69). Microcontroller Based Speedometer Cum Odometer
Digital speedometers are generally found in high-end motorbikes and luxury cars. The speedometer is used to measure the vehicle speed and the odometer is used to measure the traveled distance of the vehicle.
70). Interfacing Tower Pro Servo Motors with 8051 Microcontroller
In this project, the servo motors are interfaced with an 8051 microcontroller. The servo motors are different when compared to other motors and the motor works on pulse width modulation signal. The servo motors can rotate from 0 to 180 degrees based on the specification of the motor.
71). Wireless Monitoring System For Cold Storage
In this project, the room temperature is continuously monitored. The two RF modules are used in this system in that one RF module is interfaced to the 8051 microcontrollers and the other RF module is connected to pc. The LM35 and the ADC 0804 are used for temperature sensing and to convert the analog temperature into a digital temperature. The software used in this project is embedded in Keil c language. It is one of the 8051microcontroller projects using Keil.
72). Interfacing 16×2 LCD And 4×3 Keypad with Microcontroller 8051
The project is about interfacing a 16×2 display and a 4×3 keypad with an 8051 microcontroller. The function of the project is very simple, whenever the person presses the button on the keypad that character should be displayed on a 16×2 display screen.
73). Servo Motor Control Through Keypad using Microcontroller 8051
The project is about how to control the servo motor through a keypad using an 8051 microcontroller. In this project, the movement of the servo motors is specified by the user. The 4×3 keypad is used to provide the desired angle of rotation to a servo motor and the 4×3 keypad is interfaced to an 8051 microcontroller.
74). Interfacing 24×2 Lcd With Microcontroller 8051 And Pic16f877 Microchip
The project is about interfacing pic16f877 microchip and 24×2 LCD with microcontroller 8051. The total number of characters displays on the LCD screen is 48, and hd44780 is used to control the 24×2 LCDs.
75). Driving Dc Motor In A Forward And Backward Direction With H-Bridge Motor Driver And Using Microcontroller 8051
The project is about control the dc motor direction using the l293d motor driver and also using microcontroller 8051. In this project the direction of the dc motor is controlled by using two methods one method is using an 8051 microcontroller and another method is using an H-bridge motor driver.
76). Generating One-Second Delay Using 8051 Microcontroller Internal Timers
The project is about how to generate a one-second delay by using internal timer 0 and timer 1 of the 8051 microcontrollers. The 89c51 and 89c52 are the two internal timers, each timer consists of 16 bits.
77). Interfacing Real-Time Clock DS12C887 With Microcontroller 8051
The project is about how to interface real-time clock DS12C887 with microcontroller 8051. The main purpose of the real-time clock is to provide the precise date and time. The real-time clock interfaced with the AT89C51 microcontroller, the AT89C51 is from the 8051 microcontroller family.
List of Microcontroller based Mini Projects
Some of the low-cost mini projects using 8051 microcontrollers are discussed below.
1). Two Digits Up-Down Counter
The main principle of this two digits up-down counter circuit is to increment the value on the 7-segment display. This circuit can be mainly used in scoreboards.
2). Five Channel IR Remote Control System Using Microcontroller
The main aim of this project is to design and demonstrate a simple five-channel remote control system. This circuit works on the principle of an IR communications
3). The Autointensity of Street Lights
This is a simple circuit that automatically controls the intensity of the street lights which are designed using a microcontroller and LED.
4). Celsius Scale Thermometer Using AT89C51
The Celsius scale thermometer is designed using AT89C51 and LM35U, this circuit works on an A/D converter
5). Smoke Detector Mini Project Using 8051 Microcontrollers With Buzzer Indication
The main component in this project is a smoke sensor, for example, take any object that creates smoke near to the smoke sensor once the smoke sensor detects the smoke and buzzer will turn on automatically. Whenever the smoke sensor detects the smoke at that time the sensor gives high output to the comparator and then the comparator gives the high output to the microcontroller.
GSM based Projects using 8051 Microcontroller
The GSM modem is used for wireless communication. Some of the GSM-based projects using 8051 microcontrollers are discussed below.
1). GSM Interfacing With 8051 Microcontroller
The GSM stands for global system for mobile communication, it is a digital mobile telephonic system. The main component in this project is the GSM module when the development board is powered the LCD board shows GSM interfacing with 8051 microcontrollers and whenever the message is sent through the phone to the GSM modem the LCD board shows that message which is received by the registered mobile.
2). GSM Controlled Robot Using 8051 Microcontroller
The modules required for this project are 8051 mc, 16×2 LCD, 8293D driver IC, GSM modem, max 232 level controller, and a robot. Suppose if we send a forward command then the two motors rotate in the forward direction that means the robot moves in a forward direction. There are few commands which are used to operate the robot depends on the commands, the robot will work according to the commands and the messages which we sent should be displayed on LCD.
3). GSM-Based Weather Station Reporting System
In this GSM-based system, we can enter the temperature, humidity, and light intensity. If the temperature increases the humidity and light intensity increase or decrease. This project is used to send the weather details to the registered mobile numbers by the GSM module
4). Industry Temperature Sensing With Gsm Notification Using 8051 Microcontroller
The GSM module is used in this project which sends the notification to the mobiles. Suppose we have set a minimum temperature is 200 C and the maximum temperature is 400 C manually. In case the temperature exceeds 400C then the system stops there and the microcontroller sends the message to the load that the temperature is increased so stop working.
Similarly, whenever the temperature goes below 200C then the microcontroller sends a message to the load that the temperature is decreased now it’s time to start working so whenever the temperature increases then the GSM modem sends the messages to the registered mobile.
5). A Vehicle With an Advanced Security System
In this project, many sensors are used such as a fire sensor, gas sensor, alcohol sensor with GPS, and GSM. The GPS tracks the vehicle and shows the exact position of the car. If a car met with an accident then the shock sensor detects and sends the message to a registered mobile number. Similarly, if a car met with a fire accident, then the fire sensor detects the fire accident and sends the message to the registered mobile number along with the location of the car. This project is used to avoid accidents. It is one of the GSM and GPS-based projects using 8051 microcontrollers.
6). GSM Board Patient Health Monitoring
This is an advanced system that allows the doctor or the relatives of a patient to check the health status of the patient remotely. This system constantly monitors the patient’s health. In this project, two parameters are monitored continuously that is a patient’s heartbeat and body temperature. If either one of the parameters goes above or below a particular limit then the system sends a message to a registered mobile number and that number can be a doctor, relative, patient, or any concerned person.
7). Tampered Energy Meter
The main aim of this project is to send messages to the higher authority people if the energy meter has tampered with electrical devices. When the energy meter has tampered the power theft will be reduced. The mode of communication is wireless communication using a GSM modem which is used to send messages to the authority people.
8). GSM Interfacing With 8051 With C Code
The project is about interfacing GSM with 8051, in order to interface the SIM 900 A to 8051 there are three pins to be considered. The first pin is the transmitter pin of the GSM that is to connect to the receiver pin of the 8051, the receiver pin of the GSM has to be connected to the transmitter pin of the 8051, and the ground pin of GSM and 8051should be the same. When we run the simulation the virtual terminal will show the commands sent by the controller.
9). GSM-Based Transformer Fault Monitoring System Using 8051
In this system four parameters are monitored they are temperature, voltage, current, and oil level. The SIM card is inserted in a GSM module that is used whenever any one of the parameters crosses the threshold level at that time the buzzer will be turned on and the respective message will send to the user with the help of the GSM modem.
10). Electrical Substation Disaster Management With Modern Sensor And GSM Modem
The features of this project are fire detection, earthquake detection, heavy rain detection, spark detection, auto, and manual cut switch. This project is used to manage the substation power supply based on the environmental conditions and if there is any threat the message will send to the authority
11). Theft Intimation of The Vehicle
The theft intimation of the vehicle over message or notification sent to the owner who can stop the engine remotely. The GSM modem is used to send messages to the owner. If anytime anything happens to the vehicle then the information conveys to the customer and the vehicle will disable automatically
12). Flash Flood Intimation Over the Global System For Mobile Communication Network To The Station Master
This project is about the flash flood intimation over the global system for mobile communication networks to the station master. The signal to the GSM modem is sending to the station master to direct the train driver to stop the train in time. The main objective of this project is to alert the station master by messages whenever the water level increases so that they can prevent railway accidents.
13). Theft Intimation Of The Vehicle
The theft intimation of the vehicle over message or notification sent to the owner who can stop the engine remotely. The GSM modem is used to send messages to the owner. If anytime anything happens to the vehicle then the information conveys to the customer and the vehicle will disable automatically.
14). Flash Flood Intimation Over The Global System For Mobile Communication Network To The Station Master
This project is about the flash flood intimation over the global system for mobile communication networks to the station master. The signal to the GSM modem is sending to the station master to direct the train driver to stop the train in time. The main objective of this project is to alert the station master by messages whenever the water level increases so that they can prevent railway accidents.
RFID Projects using 8051 Microcontroller
Some of the RFID-based projects using 8051 microcontrollers are discussed below.
1). RFID Based Voting Machine System Using 8051 Based Microcontroller
The components required for this project are RFID tags, LCD board, EVM, 8051 microcontroller, buzzer, buttons, and power supply. What the project does means it scans the voter ID card once the voter id is scanned then the person will be able to vote for the right candidate.
2). RFID Based Attendance System Using 8051 Based Microcontroller
In the development board, there will be a switch that is connected between the interrupt 1 pin and the ground. The jumper is used to enable the switch in the project, once the circuit is turned on you may notice that the microcontroller will display the message as swipes the card on the LCD board, once the person swipes the card then the microcontroller displays the cardholder name on the LCD and internally mark it as a present.
3). RFID Security Access Control System 8051 Based Microcontroller
The data of the cards will be already stored in the microcontroller. If a person swipes the card then the microcontroller opens the door for few seconds by displaying the cardholder’s name on the LCD board. If a person swipes the wrong card then the microcontroller doesn’t open the door by displaying the wrong card on the LCD board.
4). RFID Based Toll Plaza System
In this project the RFID tags are the main component, when the card is swiped the minimum charge for the toll plaza will be deducted and the gate will open automatically. Once the car crossed the gate then the gate will close automatically. If there is no amount on the card then the person should have to do recharge.
5). RFID Based Mobile Payment System Using GSM-GPRS Network
In this project, the RFID, GSM, and GPRS technologies are used. When the student taking the meals then he or she must show the RFID card to the RFID reader before that person must enter the password and amount that has to be sent to GPRS then the GPRS will update the information on LCD like e-canteen payment system using RFID-GPRS. The amount will be credited directly to the owner of the canteen. This project is useful in many places like in canteens, industries, shopping malls, universities, schools, etc.
6). RFID Based Library Management System Using 8051 Microcontroller
The main aim of this project is to reduce the involvement of the library person. Normally we take books and after that will show that books to the respective person of the library or we enter the details of books in a registered book, in order to enter in a register book we can show the RFID tag to the RFID reader to take the books so there is no need to write in a registered book. Once the card is shown to the RFID reader all the details of the person will be recorded automatically.
7). Auto Billing Mall Shopping Cart Using 8051 Microcontroller
The main objective of this project is to avoid or reduce human power. The main component in this system is an RFID reader and the system can be used in many places like shopping malls, supermarkets, etc. The cost of the product will be displayed on the display whenever the person places a product in a trolley.
8). Verifications of Passport Details Using the RFID System
This project is to check the status and details of the passport holder by using the RFID card. In status, we can get all the details of the person such as name, age, gender, nationality, passport number. In this project, RFID technology is used to access the password holder details.
Sensor based Projects using 8051 Microcontroller
Some of the sensor-based projects using 8051 microcontrollers are listed below
1). Heartbeat Monitoring Using 8051 Microcontroller
The main component in this project is a sensor, the sensor senses the heartbeat of the finger when we place the finger on the sensor it generates the data and that generated data goes to the microcontroller. The sensor consists of three wires one wire is for VCC, the second wire is for ground, and the third wire is for a signal. The BPM of the person will be displayed on the LCD board.
2). Bidirectional Visitor Counter Using 8051based Microcontroller
In this project, the two reflective type IR sensors are used for detecting the entry and exit of the person. Once we switch on the circuit the LCD will display the count as zero. The two IR sensors have been placed one is inside and another one is outside of the room.
Once the person crosses the sensor repeatedly from outside to inside the microcontroller keeps on incrementing the counter until the person has stopped crossing it which means it counts the number of persons entering the room similarly if the person crosses the sensor from inside to out the microcontroller keeps on decrementing until the value reaches zero.
3). Temperature Based Light Dimmer using 8051
The components used for this project are a temperature sensor, microcontroller, A/D converter, LCD board, and triac. The temperature sensor senses the surrounding area temperature which gives analog value, as the microcontroller can’t take analog values so the A/D converter is used to convert that analog value to digital, after that microcontroller takes the digital value and passes that value to LCD board to display the temperature. Whenever the bulb glows brightly LCD board shows the load is full, when the bulb glows with a low-intensity LCD board shows speed is medium.
4). Sound Operated Display On LCD Using 8051 Microcontroller
The project is about interfacing the liquid crystal display board and sound-operated circuit with an 8051 microcontroller. Whenever the sound is produced at that time the message will be displayed on the LCD screen and the message will disappear after a short duration of time. The circuit consists of four modules they are control circuit, sound sensor, display module, and amplifying circuit.
5). Celsius and Fahrenheit Scale Digital Thermometer
In this project the temperature displays on a Fahrenheit scale. The digital thermometer is made by interfacing the temperature sensor with the AT89c51 microcontroller. The LM35 is the temperature sensor used in this project.
6). Digital Thermometer Cum Controller
The project objective is to control the device temperature based on the requirement. The AT89S8251 microcontroller is used which is the heart of the circuit and the temperature sensor which is used in this project is IC DS1821.
Embedded Projects using 8051 Microcontroller
Embedded systems are the combination of hardware and software designed for a specific purpose. Some of the embedded projects using 8051 based microcontrollers are discussed below.
1). Home Automation System
This project is about the home automation system in which we can control the home appliances with a smartphone using Bluetooth as a mode of communication. The system that we build will have an automatic logic program on the microcontroller. We can on and off any applications by using an app on a smartphone.
2). Smart Lighting System using PIR
In a smart lighting system, the lights are controlled using automatic embedded systems. The system that you build will send the number of occupants in a room using passive infrared sensors and switch on or off the lights in a room. If a person enters the room the lights will be turned on and turned off whenever the person leaves the room.
3). Access Control With RFID
An RFID based access control system uses RFID readers to capture the RFID tag information, then the microcontroller process the information and displays appropriate information on an LCD as well as it automatically opens and closes the gate
4). Automated Railway Crossing
In automate railway crossing, IR sensors and microcontrollers are used for automating railway control. The gates will open automatically whenever the IR sensors sense and detect an approaching train similarly the gates will close automatically whenever the train crosses the gate.
5). Solar and Smart Energy System
In solar and smart energy systems, the flow of traffic is regulated automatically with the help of an IR sensor. The solar battery charging circuit can also be used to power our smart traffic control systems.
6). Up and Down Control Speed of DC Motor in Embedded Systems
There will be two different switches for an up and down motion of the motor. The speed will be high if the duty cycle is high and the speed will be low if the duty cycle is low. When we press the up button the speed of the motor will increase and control the speed of the motor down button will be used.
Voice Controlled Projects using 8051 Microcontrollers
Some of the voice-controlled based projects using 8051 microcontrollers are discussed below
1). Voice Control Home Load Automation Using 8051 Based Microcontroller
This project is used to turn on or turn off the electronic gadgets that mean to control the electronic gadgets with android applications or mobile phones. For example, the AMR voice is used which is downloaded in mobile and that is to be connected with the Bluetooth module, whenever the person speaks AC on or AC off then the AC will on, in this way the electronic gadgets works based on the audio.
2). Speaking Microcontroller For Deaf And Dumb
This is a very innovative project for deaf and dumb people. The main component in this project is the voice circuit module. Whenever the deaf and dumb people rotate the button they can hear the voice, for example, if a person rotates the notch one time they get a sound from the voice module that the selected button is for the water similarly if a person rotates the notch two times they get a sound from the voice module that the selected button is for food, similarly there will be a help button for medicines, etc.
The microphone in this project records the predefined voice record messages and the speaker played by the messages. Whenever the system is turned on it plays the welcome message, whenever a dumb person carries this system he needs to press the button where the predefined message will playback. The maximum duration of each voice record is 5 seconds.
3). Voice-Based Home Automation By Using 8051
The main aim of this project is to control the home appliances by voice. The main component in this project is the voice recognition module, this module depends on the ARM-based process. The voice recognition module recognizes the voice so by using this module we can control all electrical devices by voice.
The voice module consists of 15 voice instructions and those 15 instructions are divided into three groups, each group contains five voice commands. Some of the voice commands are light on, light off, fan on, fan off, all electrical devices on, all electrical devices off, etc.
Robotics Projects using 8051 Microcontroller
The robotics-based projects using 8051 microcontrollers are discussed below
1). Ultrasonic Obstacle Avoidance Robotic Vehicle Using 8051 Microcontroller
This project is used to avoid obstacles for example if a robot is traveling and it sees an obstacle and it observes the obstacle in the range of more than 40 cm then it just move forward and avoid the obstacle because it is more than 40 cm similarly if the obstacle is under 40 cm it will just move back and turns left and starts moving so it will avoid the obstacle in the range of less than 40 cm. If there is an obstacle then the robot stops automatically, it will not move forward.
2). Human Detection Robot
The specialty of this robot is it detects human beings, it is used to rescue the human beings under the buildings and also used to detect the enemies. The proposed system can be divided into two circuits one is a transmitter circuit and another one is a receiver circuit, the receiver circuit is placed on the robot, and the directions of the robot are controlled by using pc.
3). Line Following Robot Vehicle
It is an innovative project in which the robot vehicle has an IR sensor that detects black or any color path. The IR sensors sense the lined path where the robot vehicle has to move, the robot vehicle will follow the line which is printed in any color.
4). Hand Gesture Based Robotic Vehicle using 8051
The robotic vehicle in this project operates by hand gestures, when the person changes the hand direction according to that direction the robotic vehicle will move. If the hand direction is backward then the robotic vehicle moves backward, if the hand direction is forward then the robotic vehicle moves forward, similarly it turns left and right according to the hand gestures. This is a simple explanation of this project.
5). Pick and Place Robot With Soft Catching ARM
Soft catching is meant for lifting the object with required pressure such that it doesn’t damage the object that is going to lift. The robot holds or catches the object once we give a command for the robot to catch. The robot will understand how much pressure it has to apply while catching the objects.
6). War Field Spying Robot
In this project wireless camera is used to take the pictures in night vision, so whatever the pictures are taken by a camera will be seen on TV. The technology which is used in this project is RF technology.
7). Edge Avoiding Robot
The edge-avoiding robot using an 8051 microcontroller project is similar to the line follower robot. The main objective of this project is to detect the edges, for example, the robot is at the edge of the under-construction building then this robot automatically detects the edge and takes a turn back or stops moving.
8). FM Metal Detector Robot Using 8051 Microcontroller
Metal detectors are used in many applications in order to detect the metals present in the ground. There will be four different switches in order to operate the RF metal detector robot, whenever the metal detector detects the metal then the robot automatically stops there. This is how the metal detector works.
9). RF Controlled Advanced Metal Plus Mines Detector Robotic Vehicle
This robot can be utilized for defense purposes or in the area where the human moment is generous. The main aim of this project is to detect the mines and metals, if mines and metals are detected then the detector will give the audiovisual signals. The detector which is used in this project is a handheld metal detector.
Android-based Projects using 8051 Microcontroller
The systems which are operated by using mobile phones then that type of projects we call android-based projects. Some of the android-based projects using 8051 microcontrollers are discussed below
1). Prepaid Energy Meter Using 8051 Microcontroller
This project alerts the person when there is a low balance in the prepaid energy meter and sends the message to the registered mobile number as the balance is low kindly recharge by GSM-based energy meter. Whenever the balance goes zero the load will be turned off and sends the message to the mobile to do recharge in order to get the power to the house once the recharge is done will get power.
2). Android Controlled Car
In this project, we need an android phone with a specific downloaded application that the application should connect with the Bluetooth module in order to control the car. The downloaded application in android operates the car by pressing the buttons in order to turn the car to left, to right, to forward, and to turn backward. This is a simple explanation of how the robotic car works by android mobile phone.
3). Android-Based Vehicle Fuel Theft Detection Using Bluetooth and Level Sensor
The android mobile with the preinstalled application is used for this project. This project will be activated once the user removes the key from the ignition lock, once the key is removed from the ignition LED display shows the current level and previous level of the fuel. If the fuel level decreases immediately the person will get a message on the android mobile like the fuel in the vehicle is decreased.
4). Garage Door Lifting System By Android Mobiles
The main objective of the garage door lifting system is to avoid the involvement of humans begins in order to open and close the garage doors. The garage doors are opened and closed by using the android mobiles and the project is based on the principle of dual-tone multiplexing frequency concept.
Features of 8051 Microcontroller
The features of the 8051 microcontrollers include the follwoing.
- It is a 40 pin DIP package IC
- It has 32 pins which can be used as input/output pins, where 8 pins are special-purpose pins
- The maximum operating frequency of an 8051 microcontroller is 1.0 MHz
- The operating voltage is +5v DC
- On-chip ROM is 4KB and the external ROM is 64 KB
- The size of the data bus is 8 bit
- The size of the address bus is 16 bits
- ISP connector used to connect ISP programmer with the board for loading HEX file into microcontroller IC like AT89S52 etc
- TTL jumper connects the microcontroller transmitter and receiver (TTL pins) to the RS232 port
- It has 6 interrupts
- User LED to use as output LED
- Red LED used for power indication
Applications of the 8051 Microcontroller
Some of the applications where microcontrollers are used mainly include the following.
- Machine tools
- Chemical instrumentation
- Medical instrumentation
- Electronic toys
- Microwave ovens
- Home security systems
- Intelligent multimeter
- Personal computer keyboards
- TV remotes
- Coffee makers
List of Some of the Microcontroller based Projects
- Home automation system using IoT
- Automated railway crossing
- Voice-controlled robot
- Smart traffic signal system
- Bluetooth controlled robot
- Gesture controlled robot
- Access control with RFID
- Animation hand
- Biped walking robot
- Smart building using IoT
- Automatic solar tracker
- Biometric authentication
This article covers a list of 8051 microcontroller projects using different technologies such as RFID, GPS, and GSM-based, Android and Robotics-based, Sensor and Voice-based controlled projects. If you have any queries regarding 8051 microcontroller-based projects please comment below.