HaruTools Lab | Free Online Utility Tools

Logic Circuit Simulator

A free tool for designing and experimenting with logic circuits in your browser

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IO / Gates
SWITCH
LED
AND
OR
NOT
XOR
NAND
NOR
XNOR
Flip-Flops
RS-FF
D-FF
T-FF
JK-FF
Simulation Disclaimer
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What is the Logic Circuit Simulator?

This tool is an online simulator that allows you to intuitively build and test digital logic circuits in your browser. It supports a wide range of components, from basic logic gates (AND, OR, NOT, etc.) to flip-flops essential for memory circuits. It is ideal for school assignments, electronic project preparation, or as a learning tool to deepen your understanding of digital logic.

How to Use

Key Features

Basic Steps to Get Started

  1. Select the elements you want to use (such as SWITCH or AND gates) from the "IO / Gates" panel and place them in the workspace.
  2. Connect the elements with wires and check if the intended logic is functioning correctly.
  3. Once your circuit is working, click "SAVE" to download it as a JSON file.
  4. You can resume your work anytime by clicking "LOAD" and selecting your saved file.

Frequently Asked Questions (FAQ)

Q. Can I build complex circuits?

A. Yes, basic combinational and sequential circuits (flip-flops, etc.) will work without issues. However, for extremely large circuits, performance may depend on your browser's processing speed.

Q. I can't save my circuit.

A. Clicking "SAVE" downloads the data as a file. Please check your browser's download permission settings.

Q. Does it work on mobile devices?

A. The UI is designed for mouse operations on a PC. While you can view it on a smartphone, we recommend a PC environment for precise tasks like wiring and moving elements.

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