Through the actual implementation of the project

this paper discusses the renovation scheme for old elevators and their connection to the building access control and elevator control system. Against the backdrop of the rapid development of information technology

to realize the connection of old elevators to the control system in light of local conditions

through on-site circuit surveys

the application logic is matched with the functions of the NE555 chip

and a time-delay integrated circuit is constructed with specific resistance materials for the generation and conversion of voltage signals. After this circuit is connected to the newly installed elevator control keyboard

the Lifang OCS building elevator access control system can manage the elevators in the park. By studying the principle

internal structure

pin functions of the NE555 chip and various application circuits of timers

and applying them to the field of engineering practice

this paper solves the pain points and difficulties of old elevators in building property management

and plays a positive role in visitor management

operation control and improving property management efficiency.