Electronic security code lock system

video 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.

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

hemant.cdy1 month ago

Sir can u email me the circuit plz my email id

bale112 months ago

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

can u send me copy of this project
arshad.pathan (author)  deepakshresth9 months ago
mail me on my gmail id as in video, i will replay you.
animushi2 years ago
arshad..can you send me how to build the electronic component that you use on its??
arshad.pathan (author)  animushi9 months ago
mail me on my gmail id as in video, i will replay you.
Can you please send me how you made this thing and parts list?
arshad.pathan (author)  Jr. Circuits9 months ago
mail me on my gmail id as in video, i will replay you.
karthikm1 year ago
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)  karthikm9 months ago
mail me on my gmail id as in video, i will replay you.
Nashki_301 year ago
hello arshad.pathan.....can you send me the source code for the Electronic security code lock system email is you....
arshad.pathan (author)  Nashki_309 months ago
mail me on my gmail id as in video, i will replay you.
nodoubtman1 year ago
servo motor?
arshad.pathan (author)  nodoubtman9 months ago
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
engineerx449 months ago
what is the code to make this type of device?
ytwati2 years ago
How much it cost for the controller and the LCD
arshad.pathan (author)  ytwati2 years ago
it was approximate 8$ for controller and 13$ for LCD.
what ic are you using?
arshad.pathan (author)  blinkyblinky2 years ago

i am using ATMega16 for controller.

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