Lab Report: BCD Counter & Seven-Segment Display Using 7490 and 7447 ICs – Sequential Logic Circuits | ENCS2110

Why do students struggle with Experiment 6? Because most lab manuals are confusing, and instructors don't always explain every step. But don't worry — this report is your complete solution! What makes this document a MUST-HAVE? Step-by-step procedure – I explain exactly how to wire the 7490 counter and 7447 decoder on the breadboard, with actual photos from my implementation. Full theory explained simply – Seven-segment display types (Common Anode vs Common Cathode), BCD decoding, and how the 7447 works internally. Complete truth tables – For the 7490 counter and 7447 decoder, so you can verify your results instantly. Timing diagrams – Understand exactly when the clock edge triggers the counter. Testing & troubleshooting – How to test the display lamps, how to blank all segments, and how to verify your wiring before powering on. Real implementation photos – See the actual circuit on the KL-31001 trainer with the breadboard and LED display. Post-lab questions solved – Including: Two-decade counter design (00–99) Reset input design Counting to 59 without reset Results, Discussion & Conclusion – Complete analysis of what worked, what to watch out for, and how sequential logic really behaves. Perfect for: Computer Engineering students Electrical Engineering students Anyone taking ENCS2110 or similar digital logic courses Students preparing for lab exams or final practical tests Includes real photos of: Breadboard wiring 7490 counter connections 7447 decoder setup Seven-segment display showing digits 0–6 Pulse generator and clock source What you'll learn: How BCD counters work How to drive a seven-segment display How to use the 7490 as a decade counter How to test and troubleshoot digital circuits The difference between manual and automatic clock pulses Why trust this document? Because it's written by a student who actually did the experiment, struggled through the mistakes, and documented everything clearly so you don't have to. Don't waste hours figuring it out alone – get the complete, tested, and working solution now! Language: English Course: ENCS2110 – Digital Electronics and Computer Organization Lab Year: 2025/2026 Pages: ~15 pages with diagrams and photos