Unlock the basics of digital electronics with this Digital Lock System designed in Proteus using 74LS174 (D Flip-Flop Register) and 74LS85 (4-bit Comparator). In this video, I demonstrate how user input is stored, compared, and verified to create a simple but reliable digital security system. 🔧 Components Used 74LS174 (Hex D Flip-Flop) 74LS85 (4-bit Magnitude Comparator) Logic Inputs LED / for Output Proteus 8 Simulation 📘 What You Will Learn How to store binary data using 74LS174 How to compare two 4-bit values using 74LS85 How to build a basic password/lock system How to test the design in Proteus 🎯 Applications Digital locks Authentication circuits Basic security systems Digital electronics learning projects 👉 Don’t forget to Like, Subscribe, and Share this project!