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ECE 198 (12)
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Lecture

# Discussion3 - TA Guide.pdf

4 Pages
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School
University of Illinois
Department
Electrical and Computer Engineering
Course
ECE 198
Professor
Herman
Semester
Spring

Description
NamenetidGroupNamenetidNamenetidNamenetid ECE 198 Worksheet 3 Sevensegment display The sevensegment display right was first patented in 1908 as an expensive method for displaying decimal numbersDespite its age the sevensegment display is still commonly used in electronics today in digital clocks calculators meters and other basic devices because it is cheap and consumes little power In this discussion section worksheet you will explore how we create digital logic drivers for these displays by solving for Boolean expressions that control the various segments Generally we use a 4bit input bbbb to determine whether each of the seven 3210output segments a b c d e f g turns on or off is 1 or 0The four bit input encodes the decimal digits 0 through 9 in 4bit unsigned binary bbbb 0110 encodes 6Traditionally the 3210 digits 0 through 9 are displayed as shown to the right 1 Fill out the truth table below to show when the output segments should be on or off for the 4bit unsigned binary numbers that correspond to 0 through 9Do not fill in the rows corresponding to 10 through 15 yet Inputs Outputs b b b b a b c d e f g 32100 0 0 0 1 1 1 1 1 1 0 0 0 0 1 0 1 1 0 0 0 0 0 0 1 0 1 1 0 1 1 0 1 0 0 1 1 1 1 1 1 0 0 1 0 1 0 0 0 1 1 0 0 1 1 0 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 0 1 1 1 1 1 0 1 1 1 1 1 1 0 0 0 0 1 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 0 1 1 1 0 1 0 1 1 1 0 1 1 1 1 0 1 1 0 0 1 1 1 1 1 1 1 0 0 1 0 0 1 1 1 0 1 1 0 1 0 1 1 1 1 0 1 1 1 1 0 1 0 0 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1
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