Introduction: Electronic Security Code Lock System

Hi friends, This is a video for testing operations, your comments and suggestions are very helpful for next version of this system. If you have any idea we can work together for developing system. Here you can get information about hardware configuration, user operations and silent operations.

- Mail: arshad.pathan(at)
- Web:
- Blog:

Hardware Configuration:
- 16 x 2 LCD User interface display
- Password Input by 4 x 3 keyboard  matrix with 0-9,* and # keys are in use
- Stepper motor is connected for locking and unlocking operations.
- There is an option for Relay, Servo Motor, DC Motor or Electro Magnet also.
- There is a green and red light indication.
- If door is locked red led will on, or on unlock green will on.
- Buzzer indication for errors and ok states

User Operation:
- For first time default password is 1234 then user can it by new password.
- Enter correct password for unlocking operation.
- System will gives error message for each wrong operation.
- Only unlock on correct password.
- User can change password by pressing 9999.
- It will ask for current password,
- If it is ok then ask for new password, then display it for 2 second.
- User can lock door any time by pressing * (Star) button.
- In door unlock mode as well as in password change mode.

Silent Operation:
- On system starts, stepper motor will find the home position using lever switch
- It will getting input from external lever switch
- When get input from lever switch, it will conform home position.
- In home position door is in lock mode.
- Stepper motor is in release mode (power off mode) after each operation.
- This operation is helpful for power saving.
- Password will save in microcontroller memory.
- In power off condition circuit will remember password without any battery backup.
- When door is unlocked and user will press * then it will give message for already unlocked condition.

Thanks for your attention.


PipiL (author)2015-09-11

Proximity Credentials provides a higher level of security, more convenience and far greater functionality than a proximity card. As used on your business and in
newer access control systems, smart credentials have the ability to manage access and many other functions much more securely. More details to see-

electronic door lock

JoseS11 (author)2015-04-02

Hi Arshad,

you can sell this product for me?

i'm interest.



deepakshresth (author)2012-01-24

can u send me copy of this project

mail me on my gmail id as in video, i will replay you.

First of all i would like to tanks for your creativity!

My name is Tesfaye Tsegaye i am electrical - electronics student now i want to make Electronics security code lock system with password for senior project. if you are help me i am interested to make this project. Our project submitting date coming soon which means after two month, so i want detail information about programming and all steps. Have a nice time. I will wait your answer. I hope you will be help me. Good bey!

Turnpike7a (author)2014-05-05

this would be a excellent instructable, if it did that instruct, this is just a show off and attention grabber... final video uploads alone do not help people in building, recreating, or modifying a design for personal use. if you want to be a good contributor to the site then do so in a manner that is conducive to others and give all the information that is required so that we don't have to ask you for the parts list, code, schematics etc

manishku99251 (author)2014-03-11

sir plz tell how to make this lock system step by step plzz....

hemant.cdy (author)2014-02-19

Sir can u email me the circuit plz my email id

bale11 (author)2014-01-21

how does the lock work ? do i know if its open or locked ... i can't see that in ur vdeo

animushi (author)2012-03-17

arshad..can you send me how to build the electronic component that you use on its??

arshad.pathan (author)animushi2013-07-23

mail me on my gmail id as in video, i will replay you.

Jr. Circuits (author)2012-04-28

Can you please send me how you made this thing and parts list?

mail me on my gmail id as in video, i will replay you.

karthikm (author)2013-02-19

Hi, how much did the entire project cost? Also could you send me a copy of the motor controlling part of the project? my email address is

arshad.pathan (author)karthikm2013-07-23

mail me on my gmail id as in video, i will replay you.

Nashki_30 (author)2012-05-11

hello arshad.pathan.....can you send me the source code for the Electronic security code lock system email is you....

arshad.pathan (author)Nashki_302013-07-23

mail me on my gmail id as in video, i will replay you.

nodoubtman (author)2013-04-15

servo motor?

arshad.pathan (author)nodoubtman2013-07-23

No i am using stepper motor in this case, but we can use servo motor, electromagnet or dc motor also this is as per requirement

engineerx44 (author)2013-07-23

what is the code to make this type of device?

ytwati (author)2012-01-12

How much it cost for the controller and the LCD

arshad.pathan (author)ytwati2012-01-13

it was approximate 8$ for controller and 13$ for LCD.

blinkyblinky (author)2012-01-06

what ic are you using?


i am using ATMega16 for controller.

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