Design a combinational circuit for elevator using Comparator, Mux, Demux, Decoder, Encoder ,Basic Gates.

Situation:

A resident wants to use an apartment elevator to go up from one level to another. The requirements are put in the desired level to go, close the lift door, and push the UP button. Then, the lift will go up by counting from one level to another until its reaches the desired level. The door will open and at the same time, an alert will be given to the residents. Similarly, the reverse process happens when the residents want to go down. The counting sequence will decrease until it reaches the desired floor.

Problems:

Security

• Security is the most important thing when you want to choose a house. Able to provide the best security for the residence can be the reason why people choose the house. As we can see, there are a lot of apartments with a lack of security causing many crimes to happen in that residential area such as burglary cases. Anyone can enter the apartment and use the elevator that can go to any floor whether he or she is not a resident of the apartment.

Solution:

Keycard mechanism

• A credential card reader in the elevator cab and a controller box in the elevator control room make up an elevator access control system. Based on the door access control credential, the access control system determines which floors can be accessible. Residents on the 9th floor, for example, will be able to get to that floor but will not be able to get to the 2nd floor. Floors with common facilities, such as the pool or fitness centre, are often open to the public. Certain people can be granted access to specific floors on specific days and hours using access control software. At any time, a member of management can visit any floor.

Determine component function that can be categorized as Combinational Circuit

Example features to be considered:

Features

Compare Value

Pattern Detector

Authentication

Controlled input

Design the component circuit

Simulate the circuit Operate base on the required operation