Digital Counter for Car Parking System

3463 Words Jul 2nd, 2011 14 Pages
Objectives:
The objective of this assignment is to design and construct a car park digital controller circuit for 99 car parking slots using sequential and combinational logic circuits. The circuits will receive the digital signals from two sensors located at the ENTRANCE and EXIT of the car park to display the number of empty slots and to display the word FULL in case of no more empty slots.

Introduction:
We need to monitor the number of empty slots in the parking areas by setting up a sensor EN allocated in the ENTRANCE whereas the output of this sensor is HIGH (1) when there is a car entering the parking area. On the other hand, EX is allocated in the EXIT; the output of this sensor is HIGH (1) when there is a car leaving the parking
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Here, Let us assume that UP = Y and DOWN = Y for the expression we obtain from the Karnaugh-Maps.
Expression for JKD: QC QD
QA QB | | | | | | | QC QD | | | | | | 00 | 01 |

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