Practical Lab

Logic Gate Designer

FREE PRACTICE

Build digital logic circuits, test binary inputs and generate truth tables.

COMPONENTS

INPUTS & OUTPUTS

Input Switch Binary input (0 / 1)

Output Bulb Result probe (0 / 1)

LOGIC GATES

AND Gate Y = A • B

OR Gate Y = A + B

NOT Gate Inverter (Y = A')

NAND Gate Y = (A • B)'

NOR Gate Y = (A + B)'

XOR Gate Exclusive OR (A ⊕ B)

XNOR Gate Y = (A ⊕ B)'

⚡

Build Your First Logic Circuit

Add an Input Switch, Logic Gate, and Output Bulb to begin. Click inputs to toggle 0 / 1!

Build, wire, and test these fundamental logic circuits on your canvas. Click binary inputs to test live propagation, then click Truth Table to verify results!

Task 01

AND Gate Test

Connect two inputs A and B to an AND gate and output Y. Verify that Y is 1 only when both A and B are 1.

Task 02

OR Gate Test

Connect inputs A and B to an OR gate. Check if the output lights up when either input is 1.

Task 03

NOT Inverter

Connect input A through a NOT gate to output Y. Test how 0 becomes 1 and 1 becomes 0.

Task 04

NAND Universal Gate

Build an (A • B)' circuit with a NAND gate. Notice that output is 0 only when both inputs are 1.

Task 05

XOR Comparator

Build an XOR circuit. Observe that output is 1 only when the inputs are different from each other.

Task 06

Combined Circuit (A AND B) OR C

Connect inputs A and B to an AND gate, then feed its output along with input C into an OR gate.

Task 07

De Morgan's Theorem Demo

Build NOT(A OR B) using an OR gate followed by NOT, and compare its truth table with a NOR gate.

Task 08

Half Adder Circuit (Sum & Carry)

Feed inputs A and B into both an XOR gate (Sum) and an AND gate (Carry). Generate the truth table for 2 outputs!

AND Gate Y = A • B

Output is HIGH (1) only if ALL inputs are HIGH (1).

OR Gate Y = A + B

Output is HIGH (1) if AT LEAST ONE input is HIGH (1).

NOT Gate (Inverter) Y = A' / ¬A

Inverts the input signal (0 becomes 1; 1 becomes 0).

NAND Gate Y = (A • B)'

Inverted AND. Output is LOW (0) only if BOTH inputs are HIGH (1).

NOR Gate Y = (A + B)'

Inverted OR. Output is HIGH (1) only if BOTH inputs are LOW (0).

XOR Gate (Exclusive OR) Y = A ⊕ B

Output is HIGH (1) if inputs are DIFFERENT (one 0 and one 1).

XNOR Gate (Equivalence) Y = (A ⊕ B)'

Output is HIGH (1) if inputs are EQUAL (both 0 or both 1).

Input SwitchBinary input (0 / 1)

Output BulbResult probe (0 / 1)

AND GateY = A • B

OR GateY = A + B

NOT GateInverter (Y = A')

NAND GateY = (A • B)'

NOR GateY = (A + B)'

XOR GateA ⊕ B

XNOR Gate(A ⊕ B)'