Gate theory
A NOT gate, also called an inverter, produces the opposite value of its single input.
Computer Science Logic Gates
NOT Gate Simulator With Truth Table
Explore the NOT gate by switching one input and watching the output invert instantly. Learn the Boolean expression, input-output behavior, and digital circuit logic through a focused OpenLabs interactive simulator.
Logic Gate Lab
NOT Gate
NOT
Y = A'
Truth Table
| Input | Output |
|---|---|
| 0 | 1 |
| 1 | 0 |
Toggle the inputs in the lab to watch this table become live circuit behavior.
Input switching
Change binary inputs and observe how the output responds in real time.
Truth table
Map every possible input combination to the correct digital output.
Circuit logic
Connect Boolean algebra with the digital building blocks used inside computers.
Learn by simulating
Understand NOT gate logic through live input-output behavior
When the input is 0, the NOT gate outputs 1. When the input is 1, it outputs 0. The simulator helps students connect symbols, Boolean expressions, truth tables, and circuit output without needing physical hardware.
Understand how an inverter changes a binary signal.
Read the NOT gate truth table correctly.
Connect NOT logic with Boolean complements.
Use the simulator to see input inversion instantly.
Where this gate is used
- Signal inversion
- Boolean complement operations
- Control logic
- Digital circuit building blocks
How the interactive lab works
Open the NOT gate lab, toggle the binary input controls, and watch the output update immediately. The visual circuit and truth table make each Boolean result easier to verify.
Digital Logic Curriculum
View All Logic GatesExplore Sibling Logic Gates & Circuits
AND GateY = A . B
AND Gate
Explore the AND gate by switching inputs, reading the truth table, and seeing why the output becomes 1 only when every input is 1.
NAND GateY = (A . B)'
NAND Gate
Experiment with the NAND gate, a universal logic gate that gives 0 only when every input is 1.
NOR GateY = (A + B)'
NOR Gate
Use the NOR gate simulator to see why the output is 1 only when every input is 0.
OR GateY = A + B
OR Gate
Explore the OR gate and see why the output becomes 1 when at least one input is 1.
XNOR GateY = (A xor B)'
XNOR Gate
Use the XNOR gate simulator to see why the output is 1 when both inputs are the same.
XOR GateY = A xor B
XOR Gate
Explore the XOR gate and see why the output becomes 1 only when the two inputs are different.
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NOT Gate FAQs
What is a NOT gate?
A NOT gate is a single-input logic gate that outputs the opposite of the input.
Why is a NOT gate called an inverter?
It is called an inverter because it changes 0 to 1 and 1 to 0.
What is the Boolean expression of a NOT gate?
The common Boolean expression is Y = A', where the apostrophe represents NOT.
Ready to test the NOT gate?
Toggle inputs, verify the truth table, and build confidence with digital logic through a live OpenLabs simulator.