Password Based Door Lock System Using 8051 Microcontroller

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HOME HO ME » » FREE PROJECT CIRCUITS » CIRCUITS » MINI PROJECTS » PROJECTS » PASSWORD BASED DOOR LOCK SYSTEM USING 80 51 MICROCONTROLLER

Password Password Based Door Lock System using 8051 Microcontroller AUGUST 22, 2017 BY ADMINISTRATOR — 110 COMMENTS

Contents [ hide hide]]

1 Construction and Output Video 2 Principle Behind the Circuit 3 Circuit Diagram of Password Based Door Lock System 4 Components Required 4.1 Hardware Requirements 4.2 Software 4.2 Software Requirements 5 How to How to Design Circuit of Password based Door based Door Lock System? 6 Password Based Door Lock System Circuit Simulation Video 6.1 DOWNLOAD PROJECT CODE 7 Password Based Door Locking System Circuit Operation 7.1 Password Based Door Lock System Algorithm 8 Advantages of Password Based Door Lock System 9 Applications of Password Based Door Lock System 10 Limitations of Password Based Door Lock System 11 Related Articles

Password Based Door Lock System using 8051 Microcontroller is a simple project where a secure password will act as a door unlocking system. Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system. These techniques are an integration of mechanical and electronic devices and are highly intelligent. One of the prominent features of these innovative lock systems is their simplicity and high efficiency. Such an automatic lock system consists of electronic control assembly, which controls the output load through a password. This output load can be a motor or a lamp or any other mechanical/electrical load.

Here, we developed an electronic code lock system using 8051 microcontroller (a Password based Door Lock System using 8051 Microcontroller), which provides control to the actuating

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the load. It is a simple embedded system with input from the keyboard and the output being actuated accordingly. This system demonstrates a Password based Door Lock System using 8051 Microcontroller, wherein once the correct code or password is entered, the door is opened and the concerned person is allowed access to the secured area. Again, if another person arrives, it will ask to enter the password. If the password is wrong, then door would remain closed, denying access to the person.

Construction and Output Video

Recommended Reading: Electronic Code Lock System using Single Transistor

Principle Behind the Circuit The main component in the circuit is 8051 controller. In this project, a 4×4 Matrix Keypad is used to enter the password. The password which is entered is compared with the predefined password. If the entered password is correct, then the system opens the door by rotating door motor and displays the status of door on LCD. If the password is wrong, then the door is remains closed and displays “PWD is wrong” on LCD.

Circuit Diagram of Password Based Door Lock System

the load. It is a simple embedded system with input from the keyboard and the output being actuated accordingly. This system demonstrates a Password based Door Lock System using 8051 Microcontroller, wherein once the correct code or password is entered, the door is opened and the concerned person is allowed access to the secured area. Again, if another person arrives, it will ask to enter the password. If the password is wrong, then door would remain closed, denying access to the person.

Construction and Output Video

Recommended Reading: Electronic Code Lock System using Single Transistor

Principle Behind the Circuit The main component in the circuit is 8051 controller. In this project, a 4×4 Matrix Keypad is used to enter the password. The password which is entered is compared with the predefined password. If the entered password is correct, then the system opens the door by rotating door motor and displays the status of door on LCD. If the password is wrong, then the door is remains closed and displays “PWD is wrong” on LCD.

Circuit Diagram of Password Based Door Lock System

Components Required Hardware Requirements 8051 Microcontroller 8051 Development Board 8051 Programmer 4×4 Matrix Keypad 16×2 LCD L293D Motor Driver Board DC Motor 10KΩ Potentiometer Connecting wires Power Supply If 8051 Development Board is not used, then the following components are needed. 11.0592 MHz Quartz Crystal 2 x 33pF Ceramic Capacitors 2 x 10 K Ω Resistor (1/4 Watt) 10 µF Capacitor (Polarized) Push Button 2 x 1 K Ω Resistors (for pull up)

Software Requirements Keil µVision IDE Willar Programmer Proteus (for circuit diagram and simulation)

How to Design Circuit of Password based Door Lock System? Password based door lock system using 8051 microcontroller circuit design uses five major components – a Microcontroller, an L293D Motor Driver, a DC Motor, a 4×4 Matrix Keypad and a 16×2 LCD. Here, an AT89C52 Microcontroller is used and it is an 8-bit controller. This controller requires a supply voltage of +5V DC. In order to provide regulated 5V DC voltage to the controller we need to use 7805 power supply circuit. We can use 9V DC battery or 12V, 1A adaptor as a power source. Reset Circuit Design: The reset pin of the microcontroller is kept active till the power supply is

in the specified range and a minimum oscillation level is maintained. In other words to ensure the supply voltage does not falls below the threshold level of 1.2V and the reset pulse width is greater than 100ms (recommended for 89C52), we need to select the values of resistor and capacitor such that RC >=100ms. Hence, we selected a 10KΩ resistor and a 10µF electrolytic capacitor. Oscillator Circuit Design: An 11.0592MHz crystal oscillator is used to provide external clock

signal to the microcontroller. To ensure smooth operation, we need to connect two ceramic capacitors in the range of 30pF to 40pF. This crystal oscillator is connected between pin 18 and 19 of the microcontroller. Here, we used two 33pF capacitors. Interfacing LCD, Keypad and Motor Driver: First, a 10K Ω Potentiometer is connected to the

LCD Display’s Contrast Adjust Pin (Pin 3). RS, RW and E of LCD are connected to P3.0, GND and P3.2 pins respectively. The eight data lines of the LCD are connected to PORT1. The four ROW pins of the Keypad are connected to P2.0 to P2.3 and the four COLUMN pins of the Keypad are connected to P2.4 to P2.7 pins respectively. The IN1 and IN2 of (1A and 2A) of the L293D Motor Driver are connected to PORT0 pins P0.0 and P0.1. Motor is connected between OUT1 and OUT2 (1Y and 2Y) pins of L293D. Compilation of Microcontroller Code: Once the circuit is designed and drawn on a piece of

paper, the next step is to write and compile the code. Here, we used the Keil µVision software to write the program in C language. Prior to writing the code, general steps needs to be followed like creating a new project and

selecting the target device or the required microcontroller. Once the code is written, we need to save it with .c extension and then add it to the source file group under the target folder. The code is then compiled by pressing F7 key. Once the code is compiled, a hex file is created. In the next step, we use Proteus software to draw the circuit. The code is dumped into the microcontroller using an external programmer and Willar Software.

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Recommend Reading: Password Based Circuit Breaker Project Circuit Diagram and Working.

Password Based Door Lock System Circuit Simulation Video Before going to read the working of this circuit, Watch the following simulation video to get clear idea about how the above circuit works.

DOWNLOAD PROJECT CODE

Password Based Door Locking System Circuit Operation Once the circuit is powered ON, microcontroller sends commands to the LCD to display “enter password” on LCD. Now we need to enter the password using the keypad. Once password is entered, it displays 5 stars on LCD to indicate that controller read password successfully. Now the controller compares the entered password with predefined password. If the password is matched, then the microcontroller makes P0.0 HIGH and P0.1 LOW, so the motor driver gets the input signals for forward motion of the motor. As a result, the Door Motor rotates in forward direction to open the door. After a delay of 10seconds, the microcontroller makes P0.0 LOW and P0.1 HIGH, so the motor driver gets the input signals for reverse motion. As a result, the Door motor rotates in reverse direction to close the door. If the password is not matched, then microcontroller maintains both P0.0 and P0.1 LOW. Hence, the door motor is stationary so that door remains closed. NOTE: While giving the connections, make sure that there is no common connection between

AC and DC supplies.

Buy Course along with Code: Password Based Door Lock System »

Password Based Door Lock System Algorithm 1. Initially, declare the PORT1 to LCD data pins and control pins (RS and E) to P3.0 and P3.2. Also, declare PORT2 to keypad. Also use P0.0 and P0.1 for motor driver. 2. Then, display the message “enter password” on LCD. 3. Now read the five digit password from the user. 4. Compare the entered password with the stored password. 5. If password is correct, then make P0.0 pin HIGH and P0.1 pin LOW to open the door. During this time, display “Door opening” on LCD. 6. After some time, make P0.0 pin LOW and P0.1 pin HIGH to close the door and after this display “Door closing” on LCD. 7. If the password is wrong, then display “Wrong Password” on LCD. 8. After some delay again ask to enter password. [Also Read:Adjustable Timer With Relay Output]

Advantages of Password Based Door Lock System This project provides security Power consumption is less Used commonly available components Project is simple and easy

Applications of Password Based Door Lock System This simple circuit can be used at residential places to ensure better safety. It can be used at organizations to ensure authorized access to highly secured places. With a slight modification this Project can be used to control the switching of loads through password.

Limitations of Password Based Door Lock System It is a low range circuit, i.e. it is not possible to operate the circuit remotely. If you forget the password it is not possible to open the door.

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FILED UNDER: 8051 MICROCONTROLLER, ELECTRONICS, EMBEDDED, FREE PROJECT CIRCUITS, MINI PROJECTS

Comments

aftab ahmad says APRIL 2, 2014 AT 1:13 AM

i need code of this projact ” Password Based Door Lock System using 8051 Microcontroller:” Reply

Administrator says APRIL 13, 2014 AT 2:12 PM

Please have a look at article, we have updated project code. Reply

Akash says FEBRUARY 14, 2016 AT 9:53 AM

admin plZz can i have d project code… i’m trying to replicate your project Reply

kiffayatkhan says MAY 18, 2016 AT 3:24 PM

please send code i am working on this one Reply

y.vamshi sai says FEBRUARY 29, 2016 AT 11:18 AM

the code in this article have some error in 12th n 13th line so could u plz upload correct code n plz send dat code to my mail i will be bery glad to have dat Reply

Nishant chhabra says MARCH 21, 2016 AT 1:30 PM

The project coding which you given in this article has one error which I can’t able to resolve.. Please help me to overcome it.. The error is “str_lcd: has ANSI style prototype”… what is the solution for it please mail it to my email id Reply

Anusha says APRIL 12, 2016 AT 1:57 AM

We have provided complete course along with the code…Please go through this…This may help you. http://courses.electronicshub.org/ Reply

paulo Vinicius says MAY 27, 2014 AT 2:53 PM

I need this project with assembly language Reply

Hira Hussain says JUNE 5, 2014 AT 10:43 AM

I need this project for practice.I shall be very thankful to you. Reply

Administrator says NOVEMBER 24, 2015 AT 1:50 PM

We have provided everything in article. Reply

hiro says JUNE 6, 2014 AT 11:26 AM

i need codes of this project in assembly (.asm) please.. Reply


Project code you can find in the article. Reply

vishnu says MARCH 22, 2016 AT 9:26 AM

where it is ?we cant find it in the above Article so could you please post t he code for the project ? Reply

ilia rusenov says JUNE 9, 2014 AT 5:32 AM

i need code of this projact ” Password Based Door Lock System using 8051 Microcontroller:” Reply


Please check the article, we have uploaded project code. Reply

komal says JANUARY 19, 2016 AT 12:12 AM

cant find the code..its no where in the article… Reply

Administrator says JANUARY 30, 2016 AT 6:06 AM

Please have a look, it’s there after the circuit diagram. Reply

solomon says JUNE 14, 2014 AT 2:41 AM

please send me more projects Reply


Yeah, we do more projects, keep following us, thanks for your support. Reply

umang says AUGUST 6, 2014 AT 3:45 PM

What is cost of this projects Reply


It’s FREE. Reply

a s d kiran says AUGUST 9, 2014 AT 6:16 AM

pl were i want get the password based door lock systems use spare parts and pcb Reply

vijay kumar sabbal says AUGUST 12, 2014 AT 6:39 AM

This is a very good project for the security i need this project Reply


Yeah you can try to make this project based on above article, all the best. Reply

Adisa Abdulrauf says AUGUST 21, 2014 AT 2:18 PM

i like to have guideline on this project thanks Reply

sureka says AUGUST 25, 2014 AT 2:38 PM

i need this project with assembly language &8051 microcontroller circuit diagram & apparatus required & report format please send to my email id [email protected] Reply

parth sapru says AUGUST 26, 2014 AT 7:26 AM

Can i get more projects based on microcontroller…. Reply

Aman Jain says SEPTEMBER 2, 2014 AT 9:08 AM

Hey! I need the code for the project “Password Based Door Lock System using 8051 Microcontroller” at the earliest. I would be really greatful to you if you could help me out with this!

Reply


We have updated project code long back, you may check it in the above article. Thank you. Reply

Oldane says SEPTEMBER 6, 2014 AT 4:12 PM

How do you store the input password in a array variable and compare it? Reply

prashanth says OCTOBER 23, 2014 AT 8:31 PM

plz send me the c prog file Reply

Askar says NOVEMBER 4, 2014 AT 7:30 PM

Hi, I had a quick question regarding the project design to whether or not it will be able to communicate with the main controller such as the RFM73 transceiver or not. I tried emailing you at [email protected], but it says this email is invalid. Reply

Mustafa Aftab says NOVEMBER 16, 2014 AT 8:39 PM

Email is not deliver to your id. Please email me the coding in C language. Thanks. Reply

H. Ally says NOVEMBER 19, 2014 AT 9:08 PM

Truthfully its awesome especially for the students like me. Reply


Most energetic comment for us, we always love your support and cooperation. Thank you so much for your feedback. Reply

venu gopal says NOVEMBER 22, 2014 AT 9:57 AM

suppose the password forget there is no option for operate the door lock system why..? i mean why cant be reset the password Reply

Alex says NOVEMBER 14, 2015 AT 9:19 AM

I need the code for this project Reply

Alex says NOVEMBER 14, 2015 AT 9:20 AM

I need the code for this project as a guideline for university project Reply

gaurav singh says NOVEMBER 17, 2015 AT 1:27 PM

can we change the length of password………….????? Reply

Samuel says NOVEMBER 18, 2015 AT 12:51 AM

I would like to receive the code, I have a code written and it compiles fine but there is a glitch that I am having that I seem to cannot find. This is a project sin school. Thank you Reply

irfan haider says NOVEMBER 18, 2015 AT 7:01 AM

i need coding for project i need coding beacuse i am ay initial stage of programing Reply

irfan haider says NOVEMBER 18, 2015 AT 7:03 AM

plz snd program on thAT e.mail [email protected] Reply

zubair Ahmed says NOVEMBER 18, 2015 AT 10:01 AM

i need code of this projact ” Password Based Door Lock System using 8051 Microcontroller:” in Aurdino formatt…if any one have plz snd me in my email plz…..email…[email protected] Reply

zubair Ahmed says NOVEMBER 18, 2015 AT 10:03 AM

i need code of this projact ” Password Based Door Lock System using 8051

Microcontroller:”..arduino format base…any one have then plz email me …[email protected] Reply

aivee says NOVEMBER 18, 2015 AT 9:43 PM

This is really helpful.. Can you give us the code for us to try. Thank you.. Reply

PULAPA SUDHEER CHOWDARY says NOVEMBER 23, 2015 AT 11:59 AM

I am interested in this project work Reply


That’s a awesome project, many people are showing interest to do this project. All the best. Reply

ravi kumar says NOVEMBER 27, 2015 AT 9:50 AM

can u give me project source code in arranged way(in one file) Reply

Syed Irfan says DECEMBER 1, 2015 AT 5:30 AM

Need the project code can u plz send me to my email the above code shows corrupted. Thank u

Reply

amr magdy mahmoud says DECEMBER 3, 2015 AT 4:51 AM

i need this project code to learn m yself as i wan to specialized in this kind of science , so i wan to check if there was any something wrong with my assembly code Reply

Anusha says JANUARY 2, 2016 AT 6:44 AM

Project code is uploaded..Please check in the article Reply

Sunny says DECEMBER 6, 2015 AT 3:29 AM

I need this project because it is my final year project topic. Please I need this project, but I need the code that can help me change the stored password. And please admin help me drop some comments that explains the codes so I can be able to explain during defecne Reply

shru says DECEMBER 8, 2015 AT 3:51 AM

i am interested to do this project but can anyone tell me instead of door motor what else we can use to show that the door is locked or not?? Reply

Mustafa Abu elqassem says DECEMBER 12, 2015 AT 9:54 PM

I need the code for my graduation project Reply

ali says DECEMBER 14, 2015 AT 6:37 AM

sir can i hace hex file Reply

enquhone says DECEMBER 17, 2015 AT 10:32 AM

Please give full code to aid for my course project Reply

ani naidu says DECEMBER 20, 2015 AT 9:29 AM

sir, please tell me what is the project code means……… Reply

Rohan says DECEMBER 23, 2015 AT 8:02 AM

please can you give me the PCB layout and block diagram of this project. Reply

Sourabh sen says JANUARY 7, 2016 AT 2:02 PM

This is a very good project for security… i want to made this .. Plese tell me requirements for this project. And send me code for microcontroller.. Reply

shahid amin says JANUARY 17, 2016 AT 2:13 PM

this method for yhis project is much difficult ………………. Reply

Gayan Gowramma says JANUARY 24, 2016 AT 12:56 PM

Hey I need the code for the project “Password Based Door Lock System using 8051 Microcontroller” as early as possible. it would great if u do the needful. Reply

Gayan Gowramma says JANUARY 24, 2016 AT 12:59 PM

I need the code for this project as early as possible. it would be great if u do the needful Reply

Dhananjay Chumbalkar says JANUARY 24, 2016 AT 3:38 PM

Actually I want to do a mini project on this topic because I need it…plz help me and send me code… Thank you! Reply

taruna says JANUARY 26, 2016 AT 11:03 AM

I need code for this project plz …m making the same.project for my mini project in college… plz…rpy to me asap…I need the code ..tysm Reply

K.bhargavi says JANUARY 27, 2016 AT 1:06 PM

Useful Reply

Shreyas says FEBRUARY 1, 2016 AT 3:26 PM

I am making the same project as I have taken this project as my topic for mini project so con you please provide the programs. Reply

Souryadeep Sen says FEBRUARY 2, 2016 AT 8:20 AM

Can you please provide me with the assembly level code. I am learning how to use the hardware and I saw this video on youtube and it seemed like an interesting project and one which I can learn from. I would be extremely obliged if you could provide me with the assembly level code. Reply

shubham Telavane says FEBRUARY 2, 2016 AT 10:21 AM

I am making the same projectas I have taken this project as my topic for mini project so con you please provide the programs. Reply

talib says FEBRUARY 2, 2016 AT 8:59 PM

send me code plz.. Reply

aarti says FEBRUARY 3, 2016 AT 5:33 AM

i m making this project please give me the code Reply

Arpitha says FEBRUARY 6, 2016 AT 2:54 AM

I need code for ths project as i am doing it as mini project in my colg so plz send me the code using 8051 microcontroller” if it s in arduino format base thn it would be of great help ty Reply

ahmed says FEBRUARY 9, 2016 AT 4:51 AM

i need this project code because i wan to implement my last year graduation project plz give me the code of this project Reply

Admin says FEBRUARY 10, 2016 AT 1:55 AM

Hi, we have already uploaded the project code please check it Reply

miss sandhya medpalli says FEBRUARY 10, 2016 AT 3:34 AM

hi i am sandhya .I need project code of this project for my last year project submission. Can u give me project code of”password door lock system using 8085 ‘in assembly language? Reply

Sampada says FEBRUARY 11, 2016 AT 10:52 AM

I need a project code in c language for mini project…pls provide code…. Reply

Hariharan V says FEBRUARY 16, 2016 AT 11:51 AM

i need the code of door lock password project… this is the first time am doing dis… first am going to try the same project… Reply

Anusha says FEBRUARY 17, 2016 AT 2:08 AM

We have uploaded the code…Go through the article completely..we have provided link below simulation video Reply

Chandan says FEBRUARY 19, 2016 AT 3:44 PM

The project code uploaded by you is not opening after the download please snd us a original code to replicate your project. Reply


Please try to install keil software to open these files Reply

shreyas says FEBRUARY 20, 2016 AT 8:39 AM

my circuit is ready but ,

program not available ice 8051 plz send program on that mail [email protected] Reply


Code is uploaded in the article.Please download the code from article. Reply

poovarasi says FEBRUARY 26, 2016 AT 6:22 AM

m interested in dng the project.. can u plz send me the code Reply

rajlaxmi says FEBRUARY 27, 2016 AT 2:15 PM

Plz send the code..it’s my 1st project.. Reply

Admin says FEBRUARY 29, 2016 AT 2:13 AM

Download code from the article Reply

shanu says MARCH 3, 2016 AT 12:28 AM

Can u pls send me the program in c language my email I’d is [email protected] Reply

Admin says MARCH 3, 2016 AT 1:11 AM

Download code from the post..It is written in C Reply

jabbar rahim says NOVEMBER 27, 2016 AT 5:36 AM

sir tell me the specification of dc motor that used in password door lock system. Reply

ajay says MARCH 8, 2016 AT 1:27 AM

Why that relay is required in the project we can rotate the stepper motor without relay also? Reply

Anusha says MARCH 8, 2016 AT 2:24 AM

In real time we may use AC motor..Relay is used to provide isolation here. Reply

shanu says MARCH 9, 2016 AT 3:28 PM

Can I get this ic at89c59 with this program burnt on it for password protection door locking system? Reply

mukesh says MARCH 17, 2016 AT 11:01 AM

Can you send me .SCH file at [email protected] Reply

prasad says MARCH 18, 2016 AT 11:44 AM

i need codes of this project in assembly (.asm) please.. Reply

Saukhya says MARCH 21, 2016 AT 12:38 AM

I want assemblylanguage code for this project.And I m not able to find asm file only C file is there n no asm file..Can u pls mail it to me??or pls re-post the link here again. Reply

sen says MARCH 21, 2016 AT 3:27 PM

i am trying to make this project’ but iam facing the problem while creating hex file can you provide me hex file or help me in creating it with keil i’ll be very thankfull to u Reply

ebuka says MARCH 23, 2016 AT 7:45 AM

please admin. how do i combine the codes in the compiler. this is my final year project Reply

Anusha says MARCH 28, 2016 AT 8:53 AM

Please be clear with your question..

Reply

Abdul Muqeet says MAY 5, 2016 AT 4:13 AM

where is the code ? i can’t see it anywhere in the article if it’s really in the article then please upload the link. Reply

arsalanarain says MARCH 28, 2016 AT 12:04 PM

Help ? Please Name the Simulator Software Use in This Video. Reply

almaz says MARCH 31, 2016 AT 11:51 AM

I also need of code password based door lock system Reply

Unknow says APRIL 3, 2016 AT 2:20 AM

Which Software u used to implements the parts .. E:g Multisim , kindly answer bcs i cant find microcontroller at89c51 in multisim. Thank u Reply

Milouni Desai says APRIL 7, 2016 AT 5:10 AM

how do we connect the preset to LCD? Reply

Milouni Desai says APRIL 7, 2016 AT 5:13 AM

please help me with the connections of preset with LCD Reply

akhil says APRIL 9, 2016 AT 8:31 AM

can i get programming of it ???? plzzz Reply

m.waseem akram says APRIL 19, 2016 AT 8:49 AM

where i can find the hex file or the programe to commond the microcontroller???? Reply

umair malik says MAY 26, 2016 AT 11:03 AM

I am working on this project based on this article but i have a problem with hardware. In Proteus project works good but when implement on hardware its not working … please guide me admin. Reply

sahana says JULY 30, 2016 AT 8:29 AM

I thinkthis is really interesting to doo i like it to be implemented Reply

BASHIR ADAM says FEBRUARY 21, 2017 AT 9:10 AM

PLEASE I NEED THE CODE FOR MICROCONTROLLER BASED LOCK USING COLOUR SECURITY CODE IF ANY Reply

rushikesh says MARCH 20, 2017 AT 11:46 PM

Programme for. 8051 Reply

AFTAB ALI says MAY 10, 2017 AT 4:29 PM

sir i am enggineering student ……i have been given this project (PASSWORD BASED LOCK DOOR SYSTEM) send me the code of this project i will be very grateful to you my email address: [email protected] Reply

Anusha says JULY 7, 2017 AT 4:49 AM

Please go through this course for code and complete information Reply

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