Description

Can change the password + three times lock:

1602 LCD combination lock:

Hardware composition: single chip microcomputer + minimum system +LCD1602 LCD module + buzzer module +LED indicator module + relay driver module + matrix keyboard module +AT24C02 chip module

1. The AT24C02 chip can be used to save the stored password after power failure. Password is 6 digits, can be changed at will, change to enter twice to confirm;

2. Matrix key input, 1602 LCD display, relay simulation unlocking, unlocking indicator light. Relay has normally open normally closed contact can be connected with external electromagnetic lock load

3. There is an administrator password, even if you want to remember the password is not afraid of ha, can be retrieved;

4. If the password is entered incorrectly for 3 times, the buzzer will sound and the alarm will be locked;

5. The liquid crystal backlight adopts light-sensitive automatic recognition. It is not bright and dark during the day, so as to save energy and see the screen clearly at any time.

Digital tube combination lock:

Hardware composition: single chip microcomputer + minimum system + digital tube display and drive module + buzzer module +LED indicator module + relay drive module + matrix keyboard module +AT24C02 chip module.

1, the function is basically the same as ①, is not the same as the display mode, enter the password when the display 8. HELLO is displayed when the lock is successfully opened. Error is displayed when the password is incorrect. Backspace function is available (clear the last entered password).