🔌 Welcome to the Digital-Logic-Designs-Logisim Repo!

I'm the README.md file of this folder to assist you, here to guide you step-by-step! 🚀

This repository is a digital showcase of my practical journey through the Digital Logic and System Design course in the 3rd semester. Here, I've recreated and simulated a wide range of combinational and sequential logic circuits using Logisim, some of which were also physically implemented on a Digital IC Trainer Kit during college labs.

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📚 Table of Contents

• 📖 Introduction
• 🛠️ Lab Setup & Hardware Used
• 📁 Folder Structure
• 🔄 Simulation Tool
• 🎯 Final Takeaway

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📖 Introduction

This repository includes 13 folders in total:

• 11 folders (Day-1 to Day-11) represent daily lab sessions in which different digital circuits were implemented—either on hardware kits or in Logisim.
• 2 folders (Combinational & Sequential Circuits) cover additional practice work where I explored theoretical concepts and implemented them as working circuits.

This work consolidates my hands-on learning and deep understanding of how fundamental gates, multiplexers, flip-flops, and other components form the building blocks of digital systems.

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🛠️ Lab Setup & Hardware Used

The circuits in Day-1 to Day-4 and Day-10 were implemented on actual hardware using:

• 🔧 Digital IC Trainer Kit ML-444T
• 🧱 ICs Used:
  • IC7400 – Quad 2-Input NAND
  • IC7408 – Quad 2-Input AND
  • IC7432 – Quad 2-Input OR
  • IC7404 – Hex Inverter (NOT)
  • IC7486 – Quad 2-Input XOR
  • IC74153 – Dual 4x1 Multiplexer
  • IC74107 – Dual JK Flip-Flop
• ⚙️ Breadboard, Connecting Wires, Power Supply

Due to hardware limitations on GitHub, physical circuit images are replaced by simulated equivalents in Logisim.

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📁 Folder Structure

This repository contains 13 items in total:

• 📂 Day-1 to Day-11 – Circuits implemented per lab session.
  • 🧪 Hardware-based circuits: Day-1 to Day-4, Day-10
  • 💻 Logisim-based simulations: Day-5 to Day-9 and Day-11
• 📂 Combinational Circuits – Practice circuits from topics like Adders, Subtractors, Encoders, Decoders, MUX, DEMUX, etc.
• 📂 Sequential Circuits – Flip-Flops, Registers, Counters, and custom Finite State Machines.
• 📝 Each folder contains a dedicated README.md explaining:
  • Circuit goal and logic
  • Screenshot of the Logisim circuit
  • Key components used
  • Circuit behavior and output analysis

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🔄 Simulation Tool

All circuits were simulated using:

• 🧰 Logisim: A graphical tool for designing and simulating logic circuits.
  • Open-source and easy to use.
  • Supports combinational and sequential circuit design.
  • Provides real-time testing and debugging environment.

You can open the .circ files in Logisim to test, run, and modify circuits live.

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🎯 Final Takeaway

This repository is not just an assignment submission, but a practical reflection of what I learned in Digital Logic Design. Recreating each logic design in Logisim helped me build a strong foundation in:

• Logic gate behavior and interaction
• Circuit design patterns (e.g., MUX as universal gates)
• Sequential logic thinking and timing analysis
• Real-to-simulation transition from breadboards to virtual circuits

By documenting every part of this repo neatly with folder-wise README.md, I’ve ensured that any learner or enthusiast can reproduce and learn from my digital logic implementations.

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✅ Explore any folder to dive deep into the corresponding circuit and its simulation.

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