abcdnumber 0000 0 0001 1 0010 2 0011 3 0100 4 0101 5 0110 6 0111 7 1000 8 1001 9 0 = off 1 = on...
TRANSCRIPT
A B C D Number
0 0 0 0 00 0 0 1 10 0 1 0 20 0 1 1 30 1 0 0 40 1 0 1 50 1 1 0 60 1 1 1 71 0 0 0 81 0 0 1 9
0 = Off1 = On
Binary Coded Decimal (BCD)
A B C D
0 1 1 0
A B C D
1 0 0 1
Binary Coded Decimal (BCD)
Output is G1
B C G1
0 0 0
0 1 1
1 0 1
1 1 1
Truth Table for ‘B OR C’
Input is B, C
A B C D
0 1 1 0
A B C D
1 0 0 1
Binary Coded Decimal (BCD)
B C
0 1
Scrap paper
Output is G1
B C G1
0 0 0
0 1 1
1 0 1
1 1 1
Truth Table for ‘B OR C’
Input is B, C
0 1
Output is G1
B C G1
0 0 0
0 1 1
1 0 1
1 1 1
Truth Table for ‘B OR C’
Input is B, C
1is
G1
D G1 e0 0 00 1 01 0 01 1 1
Truth Table for ‘D AND G1’
Input is D, G1
Output is e
A B C D
0 1 1 0
A B C D
1 0 0 1
Binary Coded Decimal (BCD)
D G1
1 1
Scrap paper
D G1 e0 0 00 1 01 0 01 1 1
Truth Table for ‘D AND G1’
Input is D, G1
Output is e1 1
D G1 e0 0 00 1 01 0 01 1 1
Truth Table for ‘D AND G1’
Input is D, G1
Output is e
Switch is ON
is 1e
Seven-Light Display
Number(6)
A B C D
abcdefg
b
c
a
d
f
eg
0 01 1
0 01 1
ON