Procedure D:
Half adder circuit using NAND gates
Half Adder
74XX00 Chip 1
Pin 7: GND Pin 14: 5V DC
NAND1
NAND2
NAND3
NAND4
SUM
A
B
74XX00 Chip 2 Pin 7: GND Pin 14: 5V DC
NAND5
CARRY
Figure 7: Half adder circuit using NAND gates
A
B
SUM
CARRY
0
0
0
1
1
0
1
1
Table 4: Half adder truth table