1. Counter Fundamentals Presented by :
Computer and Electronics Engineering Department
University of Nebraska - Lincoln

2. Binary Count
B A
Decimal
0 0
0 1 1
1 0 2
1 1 3

3. Binary Count C B A Decimal 0 0 0 0 0 1 1 0 1 0 2 0 1 1 3 1 0 0 4 1 0 1
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7

4. Binary
D C B A
Decimal 8 1 9 2
10 (A) 3
11 (B) 4
12 ( C) 5
13 (D) 6
14 (E) 7
15 (F)

5. Binary Coded Decimal (BCD)
D C B A
Decimal 1 2 3 4 5 6 7 8 9

6. 7 Segment Displays
Display a “2” a b c d e f g
Code
Segments
Digit