Help me! -- How to design an elevator pad/display in which a user enters a floor number

Discussion in 'Homework Help' started by Batoul_5, Dec 30, 2015.

  1. Batoul_5

    Thread Starter New Member

    Dec 30, 2015
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    0
    Hello everyone,

    I have a project on digital logic design, and please I need help.

    How to design an elevator pad/display in which a user enters a floor number, and the display shows the floor numbers in sequence (whether going up or going down). Using the logic gates, FSM, etc.

    If you have any idea how can I do it please let me know,
    Thank you all.
     
  2. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,647
    759
    Hola Batoul

    If your elevator cover, say 8 floors, you would need 14 buttons, 7 to go up and 7 to go down. (Hope you understand why).

    Once this is clear for you, decide on how you will read them. I presume that you will be using a micro to do it in sequence (that is the secret) thus no clash between two buttons being pushed down at the same time.

    Another point: you do it continuously, all the time.

    Based on that, now start your design.
     
  3. Veracohr

    Well-Known Member

    Jan 3, 2011
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    Why on earth would you need 14 buttons for 8 floors? What elevator have you been on like that?

    Batoul, try starting with drawing out a state machine diagram that does what you need. Then figure out the gates needed.
     
  4. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    With the exception of first and last floor you need two to require UP or DOWN.
     
  5. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    My bad, I was thinking on the pads for each floor. The OP is going to save a lot of buttons. Good.
     
  6. n1ist

    Active Member

    Mar 8, 2009
    171
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    Sounds like he is designing the panel inside the cab... Do a search here; elevator questions come up a few times every year...
    /mike
     
  7. hp1729

    Well-Known Member

    Nov 23, 2015
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    Are you talking about a familiar 12-key pad and display as opposed to an array of buttons, one for each floor, like we find in elevators? A similar pad and display on each floor so you request a floor not just call an elevator?
    jI can see the value of this in large buildings.
     
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