CSE 2300W: Lab 5 & 6 – Display 5 bit Binary Numbers in
Decimal
Section Number: 7 (Thursday 10am – 12pm)
Name: Shayan Rizvi
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The purpose of this lab is to design a circuit that will convert and display a 5 bit binary
number into a decimal number.
This lab has three components to it.
The first
component is designing this type of circuit digitally on LogicWorks and display the 5 bit
binary number as a decimal on a hexadecimal display.
The second component is once
again using LogicWorks to design the same type of digital circuit but this time around
one has to utilize a MUX to get the same output on the hexadecimal display.
The final
component of this lab is to physically build the circuit which utilized the MUX onto the
protoboard.
Background
The idea of converting a binary number to a decimal number is not new.
We were
asked to perform this kind of task in an earlier lab.
The difference between the past lab
and this current lab is that we were not asked to build it from scratch.
In this lab we
have to create the logic equations ourselves.
Creating logic equations from scratch can
be done by making use of both the truth table and Karnaugh maps (Kmaps).
Truth
tables and Kmaps are used hand in hand.
A Kmap is a graphical representation of a
truth table.
From a truth table once can deduce where the minterms are present by
looking for the 1’s of each row in the output column (F).
Then the Kmap displays the
1’s (minterms) from the correct rows in a box format.
From this Kmap the 1’s
(minterms) can be grouped in specific ways so one can create a logic equation for that
specific output.
Specifications
This lab consisted of two different LogicWorks circuits and one physical circuit made on
the protoboard.
The two schematics made on LogicWorks each had different types of
chips and parts that were utilized from the LogicWorks library.
There were also some
parts that were constant to each schematic.
The parts that stayed constant were five
binary switches that represented the inputs E, D, C, B, A going for the most significant
bit (MSB) to the least significant bit (LSB) respectively.
There were also five binary
probes that were attached to each input (binary switch) for readability purposes (reading
the binary number easily).
Another thing constant to both schematics was the two
hexadecimal displays and that ground that was attached to one of them.
The
hexadecimal displays were there so the binary number could be displayed in decimal
form.
In the schematic made for lab 5 only SSI chips were allowed to construct the
digital circuit, all of the SSI chips available in our student kits have a representation in
the LogicWorks library.
The chips used were the 74LS04 which is the hex inverter and
another chip that was prominently used was the 74LS08 which is the quad two input
AND chip.
One chip that is not present in the LogicWorks library is the 74LS32 which is
the quad two input OR chip.
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 Fall '11
 SteveChu
 Binary numeral system, Positional notation, Decimal

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