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Binary adder

Connect half and full adders to check 4-bit addition and carry propagation.

    E27 · Binary adder0.00 s · Ready

    Electronics · Digital logic and control / Principles and inquiry

    Binary adder experiment guide

    Connect half and full adders to check 4-bit addition and carry propagation.

    How does it work?

    The sum bits together with the final carry equal A+B+Cin.

    Key relationship

    S = A⊕B⊕Cin · Cout = AB + Cin(A⊕B)

    Try this investigation

    1. Connect half and full adders to check 4-bit addition and carry propagation.
    2. Run and record each of the three baseline presets.
    3. Compare the changed variable and its result with the baseline records.

    Interpreting your results

    With A=15, B=15 and Cin=1, what are the final carry and sum bits?

    1 / 1111

    Assumptions and limitations

    Propagation delay and intermediate voltages are omitted. Inputs are integers from 0 to 15. Experiment on screen; do not reproduce this with real power supplies, outlets or high voltage.