Introduction - If you have any usage issues, please Google them yourself
Professional AVR Code Lock Project:
This project is improved version of Digital AVR Code Lock. in this project you can change 8 digit password from system menus. also there are a manager control panel that protect with a 4 digit pin code to preserve other people access to this security zone. this pin code is changeable with control panel too. another advantage of this version is a timed security level when you enter a incorrect password for 3 time the system will be standby for about 5 minute! all password saved on EEPROM memory. latest feature is changeabe realy output flip flop or timed from 1 to 255 second.