4-bit Comparator with 7-Segment Display

Overview

This circuit implements a 4-bit magnitude comparator using basic logic gates in Wokwi.
Two 4-bit values (A and B) are entered via the DIP switch. The logic compares whether A > B and outputs the result to a 7-segment display.

Inputs

• A_3…A_0 → 4-bit number A (A_3 = MSB, A_0 = LSB)

  • Switch 1 → A_3 (MSB)
  • Switch 2 → A_2
  • Switch 3 → A_1
  • Switch 4 → A_0 (LSB)

• B_3…B_0 → 4-bit number B (B_3 = MSB, B_0 = LSB)

  • Switch 5 → B_3 (MSB)
  • Switch 6 → B_2
  • Switch 7 → B_1
  • Switch 8 → B_0 (LSB)

Outputs

• The comparator result is routed through SEG_* pins to the 7-segment display.
• The display shows:
  • “1” → if A > B
  • “0” → otherwise (A ≤ B)

How to Use

Flip the DIP switches to set binary values for A and B.

• Left group Switches (1–4) → Inputs A_3–A_0 for A
• Right group Switches (5–8) → Inputs B_3–B_0 for B

The comparator logic evaluates A and B in real time, and the 7-segment display immediately shows the result of the comparison.