Introduction - If you have any usage issues, please Google them yourself
Design a single-chip control lock with key tips, effectively decoding effective tips, control the unlocking level, alarm control, password changes and other functions. Lock control procedures by the main program and delay subroutine, the keyboard input routines, modify the password subroutine, the comparison Password subroutine, display subprograms. Locks unlocking level in the correct password is input, output, control electronically controlled lock open, OPEN words. When the wrong password is entered, the error indicator light, display CLOSE words. When three error input, an alarm level alarm. You can also password changes, change the password, modify light, the modification is complete, the indicator light turns off. Selection requirements AT89C51 microcontroller and proper completion of the electronic components of the corresponding function and the different states of the electronic lock with LED display.