Digital – Design, Simulate, and Understand Logic Circuits Like Never Before

If you’ve ever wanted to dive into the world of digital electronics, whether as a student, educator, engineer, or hobbyist, you’re going to love this tool: Digital — a powerful, free, and open-source logic circuit simulator created by Helmut Neemann. Available on GitHub at hneemann/Digital, this Java-based application combines clarity, flexibility, and educational value in one sleek package.

⚙️ What Is Digital?

Digital is a logic circuit simulator designed with a clear goal: to make the teaching, learning, and development of digital logic intuitive and visual. It lets you create, simulate, and analyze logic circuits ranging from basic gates to complex CPUs — all with a drag-and-drop interface and real-time simulation.

Unlike other bloated EDA software, Digital is refreshingly simple, elegant, and lightweight. But don’t let its simplicity fool you — it’s capable of simulating complex architectures with clocked components, finite state machines, memory modules, and even custom microprocessors.

🔑 Key Features

• 🖱️ Intuitive Interface
  Drag and drop components onto your canvas, connect wires, and see how your circuit behaves in real-time.
• 🕒 Real-Time Simulation
  Changes are reflected immediately, with live logic levels and animations that bring your circuits to life.
• 🧩 Modular Design
  Use subcircuits and hierarchical design to keep things organized, even in large-scale projects.
• ⏱️ Clocked Components
  Simulate registers, flip-flops, RAM, and sequential logic effortlessly.
• 🧠 Built-in CPU & Assembler
  Digital includes a simple, yet powerful CPU with its own instruction set and assembler — ideal for teaching computer architecture.
• 🧑‍🏫 Made for Education
  Widely used in universities and schools. Perfect for explaining logic gates, truth tables, FSMs, and microprocessor fundamentals.
• 💻 Cross-platform (Java-based)
  Works on Windows, macOS, and Linux. Just download and run!
• 🔓 Open Source (GPL-3.0 License)
  Actively maintained and completely free. Fork it, contribute, or adapt it to your own projects.

📚 Who Is It For?

• Students: Learn digital logic step by step with instant feedback.
• Educators: Use it in the classroom to teach logic circuits and CPU architecture interactively.
• Makers & Hobbyists: Build and test your own logic-based inventions.
• Researchers & Developers: Prototype logic systems before implementing them in hardware.

Whether you’re building an ALU, a traffic light controller, or your own 8-bit CPU, Digital gives you the tools to simulate it with precision.

🚀 Get Started in Minutes

1. Head over to the Digital GitHub repository.
2. Download the latest release (JAR file).
3. Run it using Java (Java 8 or higher required).
4. Start building your first circuit with just a few clicks.

No complex installations. No licenses. No fees. Just pure learning and tinkering joy.

❤️ Final Thoughts

In a world of expensive and overly complex simulation tools, Digital shines as a free, open-source, and educator-friendly alternative. It’s ideal for classrooms, home labs, and anyone curious about what happens beneath the silicon.

So if you’re ready to master digital logic — from basic gates to building your own CPU — it’s time to download Digital and start creating.

Explore. Simulate. Learn. With Digital.