Introduction - If you have any usage issues, please Google them yourself
This paper introduces the electronic combination lock application background, basic function and implementation method. In terms of hardware, this design uses 51 single-chip microcomputer as main control chip, with a 4* 4 matrix keyboard as a means of password entry. It adopts 24C02 chip to complete the code s memory function, using LCD 1602 to prompt the program s running state and working procedures, adopting buzzer,LED and relay to imitate the alarm and the lock switch. In the aspect of software, it realizes the password input, remove, change, delete, etc. That it introduces the ideas of information feedback makes the combination lock function more flexible, more practical. A key to achieve some keys can use function, saving the resource. The electronic code lock was successfully simulated by Proteus, at the same time , the entity also was completed.