Biyernes, Marso 2, 2012

Seven Segment



First, we'll discuss what is a SEVEN SEGMENT DISPLAY or SSD.


A Seven-Segment Display (SSD), or seven-segment indicator, is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot-matrix displays. Seven-segment displays are widely used in digital clocks, electronic meters, and other electronic devices for displaying numerical information. 

     



Here is the Truth table:



A
B
C
D
a
b
c
d
e
f
g
0
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

Then we made a K-map out of this truth table.



Based on the Boolean expressions that we obtained, we constructed this Schematic Diagram.




   We constructed the final circuit based on the schematic diagram using SEVEN SEGMENT (ANODE), connecting wires, dip switch and IC's in the breadboard.



and this is now our SEVEN SEGMENT DISPLAY:














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