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The University of Texas at Dallas
Computer Science Department
CS 2110:
Introduction to Digital Systems Laboratory
Experiment #1 – Familiarization with Lab Equipment and Simple
AND, OR, and NOT Functions
1. Introduction:
This course is intended as a companion laboratory to CS2310, Introduction to
Digital Systems.
As such, we will be becoming familiar with simple digital circuits in the
first few laboratories, since these relatively simple circuits make up all of the functional units
in even the most sophisticated digital computer systems and microprocessor chips.
2.
Goal of this exercise:
The purpose of Experiment #1 is to (1) familiarize students with the
laboratory equipment on which all of the digital hardware exercises will be performed, and
(2) to understand the operation of the three most fundamental logic gates – the AND, OR,
and NOT circuits.
3.
Theory of experiment:
The Boolean functions AND, OR, and NOT have been discussed in
class.
The basic definitions are:
•
A AND B
is true (or “1” or “high”) if
and only if (“iff”) both A and B are true (or 1 or high).
That is,
the expression A
⋅
B is 1 iff
A and B are 1.
•
A OR B
is 1 if
either A or B or both
are 1.
•
NOT A
is 1 only if A is 0; NOT A is 0 only if A is 1.
For the digital logic circuits to be used today, inputs are nominally +5 volts for a 1, and 0
volts (technically less than about 0.7 volts) for a 0.
Likewise, circuit outputs are nominally 0
volts for 0 or false, and +5 volts for 1 or true. In today’s experiment, we will verify that the
electrical AND, OR, and NOT functions performed by the circuits in question do in fact
correspond to AND, OR, and NOT logic relations.
4.
Experimental Equipment List:
The following experimental components are required for
this experimental procedure:
•
IDL800 Digital Lab. Circuits Evaluator (“breadboard” unit with test equipment and power
supply built in)
•
IDL800 User Manual
•
SN74LS08 quad 2input AND gate (digital logic kit)
•
SN 74LS04 hex inverter (NOT) gate (digital logic kit)
•
SN 74LS32 quad 2input OR gate (digital logic kit)
•
Breadboard wire connection kit
•
Pin assignment diagrams for 74LS04, 74LS08, and 74LS32
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View Full Document CS2110, Experiment #1
2
5. PreWork:
Prior to the laboratory period, study class notes and prepare a truth table for
each of the three logic function (2input AND, 2input OR, and NOT gates).
Bring these
truth tables to the laboratory.
Also prepare truth tables for the two functions defined in part 9
of Section 6 below and bring them to the lab.
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This note was uploaded on 07/02/2009 for the course CS 4365 taught by Professor Vincent during the Spring '09 term at Universidad Torcuato Di Tella.
 Spring '09
 vincent
 Computer Science, Artificial Intelligence

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