2103LabReport5

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Apr 3, 2024

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ELET 2103 Digital Systems 1 LABORATORY REPORT GUIDE Room & Workstation # Group Members 1. Course Number: 2103 Course Name: Digital Systems Experiment Number: Lab report 5 Name of the experiment Digital Arithmetic Circuits

ELET 2103 Digital Systems 2 University of Houston College of Technology ELET 2103 – Digital Systems Laboratory Lab report on Digital Arithmetic Circuits

ELET 2103 Digital Systems 3 Laboratory Report written by: 1. Table of Contents 1 Equipment/Materials ....................................................................................................................... 4 2 Experiment 1: Procedure ................................................................................................................. 4 3 Numerical Data/Analysis ............................................................................................................... 5 4 Experiment 2: Procedure ................................................................................................................. 6 5 Numerical Data/Analysis ............................................................................................................... 6 6 Conclusion ......................................................................................................................................... 7 SAMPLE LAB REPORT FORMAT

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ELET 2103 Digital Systems 4 LAB REPORT: Equipment/ Materials :  Function generator  Power supply  Breadboard  300Ω resistor (2)  LEDs (2)  74LS74N  74LS04N  74LS00N Experiment 1: 1’s Complement Procedure:  Begin by placing the 74LS74N and 74LS04N on the breadboard.  For 74LS74N, connect pin 7 to ground and 14 to VCC.  For 74LS04N, connect pin 7 to ground and 14 to VCC.  Proceed with connecting correct pins according to Fig. 1.  Ensure that pin 3 of each 74LS74N are connected to the positive side of the function generator.  The two LEDs will connect to the two different outputs of the 74LS04N from the negative side of the LED and the positive will connect to a 330-ohm resistor. This resistor will then connect to VCC.  There should be four switches, on pins 1 and 4 of each 74LS74N section.  Connect the switches to ground.  Provide the function generator with 1Hz frequency and 5V amplitude.  The power supply will be giving 5V.  Turn on the power supply and function generator. Figure 1 (Circuit Diagram)

ELET 2103 Digital Systems 5  Now, the two LEDs should be alternating according to the 1’s complement truth table. Numerical Data / Analysis: The two pictures below are of the 1’s complement circuit, showing the two LEDs alternating. Figure 2 (Circuit) Figure 3 (Circuit)

ELET 2103 Digital Systems 6 Experiment 2: 2’s Complement Procedure: Figure 4 (Circuit Diagram)  Begin by placing the 74LS74N, 74LS04N, and 74LS00N on the breadboard.  Connect pins 7 of all 3 components to ground.  Connect pins 14 of all 3 components to VCC.  Proceed with connecting all wires according to the circuit diagram shown in Fig. 4.  Ensure that pin 3 of both 74LS74N are connected to the function generator.  The negative side of the two LEDs will connect to the 74LS04N and the positive will be connected to the resistor which is then connected to the VCC.  Create the switches on pins 1 and 4 of both 74LS74N.  The function generator will be giving 1Hz frequency and 5V amplitude.  The power supply will be giving 5V.  The LEDs will now be alternating according to the truth table. Numerical Data/Analysis: Below are pictures of the 2’s complement circuit, showing the LEDs alternating.

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ELET 2103 Digital Systems 7 Figure 5 (Circuit) Figure 6 (Circuit) Conclusion : From this experiment, we’ve learned about 1’s complement, 2’s complement, and their respective truth tables. The two circuits we have built seem to operate the same, given that the LEDs alternate in both circuits due to the clock and the power given by the function generator.