What This Document Is
This is a pre-lab assignment for ECE 218, Digital Systems at Illinois Institute of Technology, created by Professor Borkar. It prepares students for a lab exercise focused on Excess-3 BCD (Binary Coded Decimal) encoders and decoders. The assignment requires the development of logic functions and truth tables for these circuits.
Why This Document Matters
This pre-lab is intended for students enrolled in ECE 218 who are about to build and test Excess-3 BCD encoder and decoder circuits. Completing this assignment *before* the lab session ensures students arrive prepared with the necessary theoretical understanding, saving time and improving the learning experience during the hands-on portion. It serves as a foundational step in understanding combinational logic design.
Common Limitations or Challenges
This document provides the initial groundwork but does not include the actual lab procedure, component specifications, or debugging guidance. Students will still need to apply their knowledge during the lab and troubleshoot any issues that arise. It also doesn’t provide a completed circuit design – the logic development is left to the student.
What This Document Provides
The full document includes:
* Tasks to develop logic functions for the Excess-3 BCD encoder and decoder.
* Requirements to create full truth tables, including the use of Don’t Care conditions.
* Instructions to draw schematic representations of the circuits using logic gates.
* Guidance to create a breadboard layout using specific integrated circuits (74LS04, 74LS32, 74LS20) and components.
* Data tables for encoder and decoder circuits.
This preview *does not* include the solutions to the logic function development, the completed truth tables, the schematic diagrams, or the breadboard layouts.