Electronic door lock

       In this blog You can see Electronic door lock system, where is used PIC microcontroler 18F45K20 and button matrix with 12 buttons (3x4).

            Here is the electrical scheme of this project:

          There is 3 columns and 4 rows, 4 LED's (green) for indication door open (correct password) and 4 LED's (red) door not open (incorrect password). Password consisting of 4 digits (4 numbers), and You checking is Your password correct or not with one button (Provera (Check)). 

             Also there is an LCD for showing messages. Messages which it showing are:

1. "Insert password"
2. When You inserting password, mesage is "Inserting pasword" (x4)
3. If You insert 5-th digit of password You'll get a message on LCD "Wrong password" and after few seconds on LCD is new message "Try again".
4. When You insert correct password You'll get message "Door open".

Next pictures presenting this messages:

You inserting password

"Wrong pasword"

Success! Door is open :)

                Also there is an DC motor, which purpose is, when door is open by password, to unlock door lock system.

Link for simulation of this Electronic door lock system.