Arduino-based Burglar and Fire Alarm System

Hi folks, I would like to share with you my project.
It is an Arduino based alarm system which consists of 4x4 matrix keypad, 16x02 LCD screen is connected to board using 2-wire schematic on 74LS164 and ATmega328p.

Here is the sources: https://github.com/mykh/Burglar-and-Fire-Alarm-System-Arduino