Design a full adder using Multiplexer.
Sol:For this we use 2 Mulplexer IC74151.
One IC displays the sum and other displays the carry.
The select lines of the ICs are short circuited. This is shown in fig.
The inputs of the first IC are given as follows
D0=D3=D5=D6=0V
And rest of the inputs (D1,D2,D4,D7) are connected to +5V. Vcc, Ground and enable pins are connected suitably.
In the case of second IC, D0=D1=D2=D4=0V and rest of the inputs(D3,D5,D6,D7)
are connected to +5V.Vcc, Ground and enable pins are connected suitably. The output of the first IC is the sum and output of the other IC is the carry.
Sol:For this we use 2 Mulplexer IC74151.
| C | B | A | Sum | Carry |
| 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 1 | 0 |
| 0 | 1 | 0 | 1 | 0 |
| 0 | 1 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 | 0 |
| 1 | 0 | 1 | 0 | 1 |
| 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 |
One IC displays the sum and other displays the carry.
The select lines of the ICs are short circuited. This is shown in fig.
The inputs of the first IC are given as follows
D0=D3=D5=D6=0V
And rest of the inputs (D1,D2,D4,D7) are connected to +5V. Vcc, Ground and enable pins are connected suitably.
In the case of second IC, D0=D1=D2=D4=0V and rest of the inputs(D3,D5,D6,D7)
are connected to +5V.Vcc, Ground and enable pins are connected suitably. The output of the first IC is the sum and output of the other IC is the carry.
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