Consider the New Year countdown display shown below in Fig. 1. The display has t

Question

Consider the New Year countdown display shown below in Fig. 1. The display has ten light bulbs going up a pole and we want one light per second to illuminate (with the previous one turning off), starting from bulb 9 at the bottom of the pole, and ending with bulb 0 at the top. The controller sets E = 1 when the countdown begins in the last ten seconds, and then counts down from 9 to 0 in binary. Fig. 1: A high level schematic of the countdown display. Your assignment is as follows: Develop the controller as a sequential circuit using the minimum number of D flip-flops and the minimum number of external gates. The job of the controller is to set the values of the control lines C0, C1, .,Cn-1 appropriately to drive the combinational logic circuit. Design the combinational logic circuit that controls the light bulb bank using the minimum number of 2x4 decoders and the minimum number of external gates. Draw the detailed low level schematic of the overall system showing the flip flops, decoders, as well as the associated external circuitry.

Explanation / Answer

U MUST HAVE TO UNDERSTAND THE STATE TRANSITION DIIAGRAM AND MATRIX

DO READ THIS FIRST

http://www.ece.rice.edu/~kmram/elec326/Notes/notes-326-set11.pdf

AND

http://faculty.kfupm.edu.sa/COE/ashraf/RichFilesTeaching/COE022_200/Chapter4_1.htm

if u have any further doubt u may ask me....

thanx

and do rate 5

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