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Chapter

Semester Project Fall 2013 1


Department
Electrical Engineering
Course Code
EE 2731
Professor
All

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Semester Project - Elevator Control
There are many applications for controller circuits. One of them is an elevator control. In
this semester project you are going to design a sequential logic circuit that may be used
to control the operation of a four story building’s elevator.
System requirements:
The system has 6 inputs and 5 outputs:
Inputs
1 or First floor – It represents a button located inside the elevator or on the first floor,
which may be used to take the elevator to the first floor, from any floor. Use SW0.
2 or Second floor - It represents a button located inside the elevator or on the second
floor, which may be used to take the elevator to the second floor, from any floor. Use
SW1.
3 or Third floor - It represents a button located inside the elevator or on the third floor,
which may be used to take the elevator to the third floor, from any floor. Use SW2.
4 or Fourth floor - It represents a button located inside the elevator or on the fourth
floor, which may be used to take the elevator to the fourth floor, from any floor. Use
SW3.
Elevator door switch - Use rotary push button switch ROT_CENTER.
Clock – Use a de-bounced button from the PmodBTN connected to the Spartan-3
board.
Outputs
4 leds used to indicate the elevator’s location. – These outputs are used to indicate
what floor the elevator is at. Use 4 LEDs and each will indicate a floor. When the LED is
turned on the elevator is at that location. Use LED0, LED1, LED2, and LED3.
Door - When this output is equal to logic 1, it indicates the elevator door is open. Use
LED7.
Details about the design:
1. The system several states and I will describe some of them: 1st floor open door,
1st floor closed door, 2nd floor open door, 2nd floor closed door, …
2. The elevator should remain at rest until someone presses a button. The rest
states are defined to be the states where the door is closed.
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