DE - Unit 5 - Lesson 5.2 - Specific Application MSI Gates

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Forging new generations of engineers
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DESIGN EXAMPLEDate of Birth Problem
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Combinational Logic Application
Design a combinational logic circuit that has
three inputs and seven outputs. As the inputs
count from 000 to 111, the seven outputs will
generate the required logic to display your date
of birth on a seven segment display.
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Circuit Inputs
X Y Z
Display
0 0 0
Example If your date of birth is July 23, 1961,
the circuit will display the output shown to the
right 07 23 61. There are dashes between numbers.
0 0 1
-
0 1 0
0 1 1
1 0 0
-
1 0 1
1 1 0
1 1 1
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Common Anode LED Display
270? - 330?
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X Y Z
Display
a b c d e f g
0 0 0 0 0 0 1
0 0 0
0 0 0 1 1 1 1
0 0 1
1 1 1 1 1 1 0
-
0 1 0
0 0 1 0 0 1 0
0 1 1
1 0 0
0 0 0 0 1 1 0
-
1 0 1
1 1 1 1 1 1 0
1 1 0
0 1 0 0 0 0 0
1 1 1
1 0 0 1 1 1 1
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X Y Z
Display
a b c d e f g
Logic For Segment a
0 0 0 0 0 0 1
0 0 0
0 0 0 1 1 1 1
0 0 1
1 1 1 1 1 1 0
-
0 1 0
0 0 1 0 0 1 0
0 1 1
1 0 0
0 0 0 0 1 1 0
-
1 0 1
1 1 1 1 1 1 0
1 1 0
a XZXYZ
0 1 0 0 0 0 0
1 1 1
1 0 0 1 1 1 1
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Create Boolean Equations for all 7 Segments
a XZXYZ
e
f
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DOB 7-Segment Display Driver Circuit
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7-Segment LED Display
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Assignment

• Design a Date-of-Birth 7-Segment Display Driver
  Circuit for your birth date. Include the truth
  table, K-Maps logic design.
• Simulate your design using circuit design
  software.
• Breadboard and test your design.