Design a full adder circuit by using only NAND gate using the electronic work bench?

To design a full adder circuit using only NAND gates in the electronic workbench, follow these steps:

1. Open the electronic workbench software and create a new project.

2. Place three NAND gates on the workspace. These will be used to implement the XOR, AND, and OR functions of the full adder.

3. Connect the inputs A and B to the first NAND gate to create an XOR gate. The output of this gate will be the sum bit (S).

4. Connect the inputs A and B to a second NAND gate to create an AND gate. The output of this gate will be one of the inputs for the OR gate.

5. Connect the outputs of the XOR and AND gates to the inputs of the third NAND gate to create an OR gate. The output of this gate will be the carry bit (C).

6. Connect the carry-in (Cin) input to the OR gate to complete the full adder circuit.

7. Test the circuit by applying different input combinations (A, B, Cin) and observing the outputs (S, C).

8. Save and simulate the circuit to verify its functionality.

Your full adder circuit using only NAND gates is now complete.

Circuit Diagram:

```
GND --(GND)--+-----+-----+
| | | |
| | | |
| | | |
| o-----+-----o
| | NAND | NAND |
| | A | B |
| +-----+-----+
| | NAND | NAND |
| ------- |
| | CARRY | SUM |
| +-----+-----+
|
|
|
|
|
|
|
|
|
+--------------+
|
V
(VCC)
```

Steps to Build the Circuit:

1. Open Electronic Workbench.
2. Create a new schematic.
3. Place the following components from the "Library" into the schematic:
- 3 NAND gates (14-pin DIP)
- 1 ground symbol
- 1 power supply symbol (5V)
4. Connect the components according to the circuit diagram.
5. Ground all inputs and outputs not connected to anything.
6. Connect the power supply to the VCC and GND pins.

Testing the Circuit:

1. Set the inputs A and B to different combinations of 0s and 1s.
2. Observe the outputs CARRY and SUM.
3. Verify that the circuit produces the correct outputs for all combinations of inputs.

Truth Table:

| A | B | CARRY | SUM |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 0 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 |
| 1 | 1 | 1 | 0 |