Introduction - If you have any usage issues, please Google them yourself
51 microcontroller electronic locks, set four passwords, password key input , input or LCD12864 by LCD1602 display if the password is correct , by opening a relay or lit LED lights to simulate the door open if the password is entered incorrectly three times in succession , the control buzzer alarm lock system in the state, you can change the password yourself if you do not open the door by entering a password abnormal , can be monitored by infrared sensors , alarm.