ET1220 Lab 1.1 COMPLETE SOLUTION

Name:

Date:

Grade:

Instructions:

·        Complete Part 1, then Part 2 sections of the Lab 1.1.  Then, complete this Lab Report by filling in all details.  Use information you gained during your experimentation to complete the answers.

·        Be sure to submit your lab report before the deadline.

Part 1- Binary-to-Decimal Number Conversion

Theory:

1.      Enter the decimal, hexadecimal, and BCD numbers for each of the following binary numbers.

Binary

Hexadecimal

BCD

Decimal

0000

0001

0010

0011

0100

0101

0110

0111

1000

1001

1010

1011

1100

1101

1110

1111

2.      Explain major differences between binary and BCD numeric representations.

Planning:

1. Provide a list of places that you can obtain the datasheets for the following components:

·        SN74LS47  Binary to BCD Decoder

·        MAN72 Seven Segment Display

·        4116R 1-331 330 ohm Resistor Pack

Preparation:

2.      Why is it important to follow ESD safety procedures when handling electronic components? What are some of the main considerations?

Wiring Procedure:

3.      Complete the wiring diagram.  Refer to Lab 1.1 Figure 1-4 and image 1 & 2 of the ET1220.U1.Lab.Images PowerPoint.  Use MS Paint to complete the wiring diagram.

Test Procedure:

4.      Record the observed values from Lab 1.1 Table 1-1.  Indicate which segments are illuminated for each input setting.

Inputs

Output

Binary

Data Lines

BCD Number

Seven Segment Display

3

2

1

0

0

0

0

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

0

1

1

0

0

1

1

1

1

0

0

0

1

0

0

1

1

0

1

0

Invalid

1

0

1

1

Invalid

1

1

0

0

Invalid

1

1

0

1

Invalid

1

1

1

0

Invalid

1

1

1

1

Invalid

Troubleshooting:

5.      For each trouble investigated, record your observations from Lab 1.1 Table 1-2. 

Trouble

Trouble

Observations

1

LED for the C segment is open. Break the connection to pin C of the 7-segment display (remove the wire).

2

An input to the 7447 is open. Break the connection to the input A pin of the 7447 (remove the wire).

3

1000 ohm resistor is open. (Remove the 1kΩ resistor).

6.      Assume that the switches are set to a binary 1000 value, but the display shows a zero.  What are three possible causes for this error?

Part 2- Binary-Number Addition and Two’s Complement Subtraction

Theory:

9.      Provide the results for the half-adder truth table.

A0

+

B0

S1S0

0

+

0

0

+

1

1

+

0

1

+

1

10.   Provide the results for the full-adder truth table.

A0

+

B0

+

Cin

CoutS

0

+

0

+

0

1

+

0

+

0

0

+

1

+

0

0

+

0

+

1

1

+

1

+

0

1

+

0

+

1

0

+

1

+

1

1

+

1

+

1

Planning:                                               

1. Provide a list of places (links) where you can obtain the datasheets for the following components:

·        74LS08 Quad AND Gate

·        74LS32 Quad OR Gate

·        74LC86 Quad XOR Gate

Preparation:

12.   What are several important things you should consider before wiring your circuit? 

Wiring Procedure:

13.   Complete the adder wiring diagram.  Refer to Lab 1.1 Figure 1-12 and image 10 of the ET1220.U1.Lab.Images PowerPoint.  Use MS Paint to complete the wiring diagram.

Test Procedure:

14.   Record the observed values from Lab 1.1 Table 1-3. 

Switch

Switch

4

3

Decimal Value of B

2

1

Decimal Value of A

B1

B0

A1

A0

Calculated

Sum

7-Segment

Display

0

0

0

0

0

0

0

0

0

0

0

0

1

1

0

0

0

1

0

2

0

0

0

1

1

3

3

0

1

1

0

0

0

0

1

1

0

1

1

0

1

1

1

0

2

0

1

1

1

1

3

4

1

0

2

0

0

0

1

0

2

0

1

1

1

0

2

1

0

2

1

0

2

1

1

3

5

1

1

3

0

0

0

1

1

3

0

1

1

1

1

3

1

0

2

1

1

3

1

1

3