Question 1

What is a logic gate simulator?

Accepted Answer

A logic gate simulator is an interactive software application that models the behavior of digital logic gates and binary circuits in real time. LogicGateSim runs directly in your web browser, allowing you to connect universal gates (AND, OR, NOT, NAND, NOR, XOR, XNOR), toggle input switches, observe signal propagation along wires, and inspect digital outputs (LEDs and displays) without physical hardware.

Question 2

How do I convert a Boolean expression into a logic circuit?

Accepted Answer

Click the Expression button in the top toolbar (or press keyboard shortcut E). Enter any Boolean algebra equation using standard operators (such as AND, OR, NOT, or symbols like *, +, !). Click Build Circuit, and LogicGateSim's automated synthesis engine will construct and wire the complete logic gate schematic directly on your canvas.

Question 3

How can I generate a truth table from my circuit?

Accepted Answer

Click the Truth Table button in the header toolbar. LogicGateSim automatically traces all connected circuit inputs and outputs, computes all 2^n binary input combinations, and renders an interactive truth table displaying the exact output states for every test vector.

Question 4

Can I simulate sequential circuits like flip-flops and clock signals?

Accepted Answer

Yes. LogicGateSim fully supports sequential logic with cyclic feedback loops and clock generators. You can adjust clock frequencies from 0.5 Hz to 10 Hz and build SR latches, D flip-flops, JK flip-flops, counters, and registers. You can explore working sequential models directly via the Examples dropdown in the header.

Question 5

How do I export or save my circuit diagrams for lab reports?

Accepted Answer

Click the Export / Import menu in the header and choose Export JSON to save your complete schematic to your computer. You can reload your circuit anytime using Import JSON. To include schematics in lab reports or homework, use your operating system's screenshot tool (Win + Shift + S on Windows or Cmd + Shift + 4 on macOS) to capture crisp diagrams.

Question 6

Does this tool support Karnaugh maps (K-Maps) and circuit simplification?

Accepted Answer

Yes. LogicGateSim integrates a Boolean algebra simplification calculator and solver. In the Expression Simulator, you can view simplified minimal sum-of-products (SOP) representations derived using Boolean theorems and absorption laws, enabling you to optimize circuit size and gate count before building.

Question 7

Can I run this simulator offline or on mobile devices?

Accepted Answer

Yes. LogicGateSim is built as a lightweight client-side application. Once the page is loaded, the entire simulation engine, Boolean solver, and truth table generator execute locally in your browser with no network dependency. It is responsive and touch-friendly for tablets and mobile devices.

Question 8

Which logic gates and components are supported?

Accepted Answer

LogicGateSim features a comprehensive digital components library: Universal Gates (AND, OR, NOT, NAND, NOR, XOR, XNOR, BUFFER, 3-input AND), Inputs & Sources (Toggle Switch, Push Button, Pulse Clock Generator, Constant High VCC, Constant Low GND), and Outputs & Indicators (Visual LED, Output Probe, 7-Segment Hex Display).

Question 9

How do I share or import circuit designs with my classmates or team?

Accepted Answer

Simply click Export JSON to download your circuit file. Send the .json file to your classmates or teammates. They can click Import JSON on their device to load your exact layout with all gates, wires, and states instantly intact.

Question 10

Is LogicGateSim completely free to use?

Accepted Answer

Yes, LogicGateSim is 100% free with no subscriptions, ads, or account requirements. It is designed as an accessible educational sandbox for students, teachers, and electrical/computer engineers worldwide.

Free Online Logic Gate Simulator

Our Mission

What You Can Do

Technology