Half Adder Using Basic Gates

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Preview of Half Adder Using Basic Gates with 74LS08 and 74LS86 ICs

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Tutorial

Start by tapping on Next button.

1. Click on 'Next' button to Add IC-74LS86 (Ex-OR Gate)

Click on 'Next' button to Add IC-74LS86 (Ex-OR Gate)

2. Click on 'Next' button to Add IC-74LS08 (AND Gate)

Click on 'Next' button to Add IC-74LS08 (AND Gate)

3. Click on 'Next' button to Connect GND and VCC of both IC

Click on 'Next' button to Connect GND and VCC of both IC

4. Click on 'Next' button to Connect Input-A to Pin-1 of Ex-OR Gate

Click on 'Next' button to Connect Input-A to Pin-1 of Ex-OR Gate

5. Click on 'Next' button to Connect Input-B to Pin-2 of Ex-OR Gate

Click on 'Next' button to Connect Input-B to Pin-2 of Ex-OR Gate

6. Click on 'Next' button to Connect Output of Ex-OR Gate to Output port as 'SUM'

Click on 'Next' button to Connect Output of Ex-OR Gate to Output port as 'SUM'

7. Click on 'Next' button to Connect same Input-A to Pin-1 of AND Gate

Click on 'Next' button to Connect same Input-A to Pin-1 of AND Gate

8. Click on 'Next' button to Connect same Input-B to Pin-2 of AND Gate

Click on 'Next' button to Connect same Input-B to Pin-2 of AND Gate

9. Click on 'Next' button to Connect Output of AND Gate to Output port as 'CARRY'.

Click on 'Next' button to Connect Output of AND Gate to Output port as 'CARRY'.

Done

You have completed the tutorial. Power on the circuit to test the behavior.

Step-by-Step Procedure

Click on 'Next' button to Add IC-74LS86 (Ex-OR Gate)
Click on 'Next' button to Add IC-74LS08 (AND Gate)
Click on 'Next' button to Connect GND and VCC of both IC
Click on 'Next' button to Connect Input-A to Pin-1 of Ex-OR Gate
Click on 'Next' button to Connect Input-B to Pin-2 of Ex-OR Gate
Click on 'Next' button to Connect Output of Ex-OR Gate to Output port as 'SUM'
Click on 'Next' button to Connect same Input-A to Pin-1 of AND Gate
Click on 'Next' button to Connect same Input-B to Pin-2 of AND Gate
Click on 'Next' button to Connect Output of AND Gate to Output port as 'CARRY'.

Block Diagram

ICs used in this circuit with pin diagram

74LS08

Quad 2-input AND Gates

74LS86

Quad 2-input Exclusive-OR Gates

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Step-by-Step Procedure

Block Diagram

ICs used in this circuit with pin diagram

74LS08

74LS86

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