ECE 301Digital Electronics

Laboratory and Experiment Guide

ECE 301 Lab ManualTable Of ContentsSpring 2006 Fall 2005

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Introduction, Laboratory Guide, Laboratory Hints Lab #1: Introduction & Binary Numbers Lab #2: Basic Gates Lab #3: Combinational Circuit Lab #4: NAND & NOR Function Implementation Lab #5: Design of Combinational Circuit Lab #6: Multiplexers Lab #7: Memory Applications Lab #8: Binary Adders & Parity Lab #9: BCD Adders Lab #10: Flip-Flops Lab #11: Counter Design Lab #12: Clocked Sequential Circuits Appendix I Data Sheets Appendix II Laboratory Rules & Regulations

EXPERIMENT IX BCD Adders

OBJECTIVE - Understand the design and operation of BCD arithmetic circuits. PREPARATION - Design and construct the circuit. PROCEDURE 1) Use a 74LS47 BCD to 7-segment Driver/Decoder to drive a seven segment display.Note that the data sheet indicates the BI/RBO = 1, LT = 1 and RBI = 1 for proper operation. Verify operation by exercising the inputs for all input combinations. (See Figure 11-8 in the course text for the interconnection of the 74LS47 and the 7 segment display.)

2) Using two 74LS83 build the circuit in Figure 4-14 of your textbook. (See Figure 11-10.) Hint: Use the binary switches as inputs, L0 to L3 as Sum indicators, and the Logic Probe as the carry-out indicator. 3) Connect the output of part 2 to the input of part 1 and verify that the circuit adds correctly.

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