PCBLAB1 Inlab Sep 18 Intro to PCB Design Using Multisin 7

8/18/2019 PCBLAB1 Inlab Sep 18 Intro to PCB Design Using Multisin 7

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THE UNIVERSITY OF THE WEST INDIESST. AUGUSTINE, TRINIDAD & TOBAGO, WEST INDIES

FACULTY OF ENGINEERINGDepartment of Electrical & Computer Engineering

B. Sc. in Electrical & Computer Engineering

PCBLAB1

Introduction to Printed Circuit Board

Design Using Multisim 7

(In-lab Exercise)


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THE UNIVERSITY OF THE WEST INDIES

ST. AUGUSTINE, TRINIDAD & TOBAGO, WEST INDIES

FACULTY OF ENGINEERING

Department of Electrical & Computer Engineering

1

Contents

1. General Information ................................................................................................................ 4

2. Lab Learning Outcomes .......................................................................................................... 5

3. Pre-Lab .................................................................................................................................... 5

3.1. Pre-Lab Exercise ............................................................................................................. 5

4. In-Lab ...................................................................................................................................... 6

4.1. Opening and Configuring the MultiSim 7 Environment ................................................ 6

4.2.

Selection and Placement of Components in Multisim 7 ................................................. 7

4.3. Modifying Component Parameters in Multisim 7 ........................................................ 18

4.4. Wiring the Circuit ......................................................................................................... 30


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List of Figures

Figure 1: Snapshot from the Multisim 7 Environment Showing Toolbars ..................................... 6

Figure 2: Schematic Diagram ......................................................................................................... 7

Figure 3: Component Toolbar ......................................................................................................... 7

Figure 4: Component toolbar with the Basic button highlighted .................................................... 8

Figure 5: Select a Component dialog box showing the Multisim Master Database ....................... 8

Figure 6: Worksheet showing placement of the HDR1X2 connector ............................................ 9

Figure 7: Standard Toolbar Showing the List of Components in Use ............................................ 9

Figure 8: Worksheet showing the location of components ........................................................... 10

Figure 9: Selecting 500_LIN ........................................................................................................ 11

Figure 10: Selecting 5K_LIN ........................................................................................................ 11

Figure 11: Worksheet with rotated components ........................................................................... 12

Figure 12: Positioning of Components in the Worksheet ............................................................. 13

Figure 13: Adding Capacitors to the Worksheet ........................................................................... 14

Figure 14: How to Search for a Component (a) ........................................................................... 15

Figure 15: How to Searching for a Component (b) ...................................................................... 15

Figure 16: Search Component Window ........................................................................................ 16

Figure 17: Search Component Result Window ............................................................................. 16

Figure 18: Search Component Result Window for 2N4401 ......................................................... 16

Figure 19: Select a Component Window - Transistor ................................................................... 17

Figure 20: Snapshot of the Worksheet after 2N4401has been added ........................................... 17

Figure 21: Database Management Window ................................................................................. 18

Figure 22: Selecting 2SC2786 transistors ..................................................................................... 19


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Figure 23: Select Destination Family Name Window .................................................................. 19

Figure 24: New Family Name Dialog Box .................................................................................... 20

Figure 25: New family name displayed under the Transistor Group............................................ 20

Figure 26: User tab in Database Management .............................................................................. 21

Figure 27: Finding copied component in created Family ............................................................. 21

Figure 28: Component Properties Window - General Tab for TIP31A ....................................... 22

Figure 29: Component Properties Window - Model Tab for TIP31A.......................................... 22

Figure 30: Footprint tab in TIP31A Component Properties ......................................................... 23

Figure 31: New component TIP31A ............................................................................................. 24

Figure 32: Copying 2SA1015 ....................................................................................................... 25

Figure 33: Click Add Family button ............................................................................................. 25

Figure 34: Create New Family Name ........................................................................................... 26

Figure 35: Ensure that the New Family was created .................................................................... 26

Figure 36: General tab in TIP32A Component Properties ............................................................ 27

Figure 37: Model tab in TIP32A Component Properties .............................................................. 27

Figure 38: Footprint tab in TIP32A Component Properties ......................................................... 28

Figure 39: Selecting the newly created TIP32A component ........................................................ 29

Figure 40: All components placed in workspace .......................................................................... 30

Figure 41 - Connecting Components Together ............................................................................. 31

Figure 42: Adjustment of wires- Before and after ........................................................................ 31


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4

ECNG 2004

Engineering Science and Technologyhttp://myelearning.sta.uwi.edu/

Semester I; 2009 / 2010

1. GENERAL INFORMATION

Lab #: PCBLAB1

Name of the Lab:Introduction to PCB Design Using Multisim 7

Lab Weighting: - Estimated totalstudy hours:

5 hours

Delivery mode: Lecture

Online

Lab Other

Venue for the Lab: Shared Computer Laboratory

Lab Dependencies -

Recommended

prior knowledgeand skills

To undertake this lab, students should be familiar with Multisim.

Course Staff Position/Role E-mail

Phone

Office Office

Hours

Jeevan Persad Lab Demonstrator [email protected] X3492 Special

Projects

Lab

Mon 9am-12pm

Wed 2-5pm

Fri 1-4pm


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2. LAB LEARNING OUTCOMES

Upon successful completion of the lab assignment, students will be able

to:

Cognitive

Level

1. Use Multisim 7 to capture all relevant information particular to acircuit design for the purpose of creating a printed circuit board.

Knowledge

2. Demonstrate competence in the use of online resources for accessinginformation relevant to electronic components.

Knowledge

3. PRE-LAB

3.1. Pre-Lab Exercise

The pre-lab exercise has been posted as a separate document on myeLearning.

Due Date: September 18, 2009

Submission

Procedure:

Student to submit a hard copy of the Pre-lab to Lab demonstrator.

Estimated time tocompletion:

2 hours


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PCBLAB1: Introduction to PCB Design Using Multisim 7

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4. IN-LAB

Allotted CompletionTime:

3 hours

Required lab

Equipment:

PC with Mutlisim 7 software installed

Required duringthe in-lab exercise

Completed pre-lab exerciseSchematic diagram from the pre-lab exercise

Bill of Materials (BOM)

Datasheets for the TIP31A and TIP32A

4.1. Opening and Configuring the MultiSim 7 Environment4.1.1. Double click on the desktop icon to open the MultiSim 7 software. A window similar to

Figure 1 will appear showing the worksheet that is to be used to draw the circuit

schematic. This worksheet in divided into rows (labeled A, B, C, etc) and columns (labeled 0, 1, 2, etc).

4.1.2. Right click on the task bar at the top of the page and select the Standard Toolbar and theComponent Toolbar as shown in Figure 1. Deselect all other Toolbars.

Figure 1: Snapshot from the Multisim 7 Environment Showing Toolbars


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Figure 2 shows the schematic diagram that will be reproduced in this laboratory exercise.

Figure 2: Schematic Diagram

4.2. Selection and Placement of Components in Multisim 7

4.2.1. The Component toolbar as shown in Figure 3 shows all the components that areavailable in Multisim 7. These components are grouped in a logical manner and each

group is represented by a specific button on the toolbar.

Figure 3: Component Toolbar

Selection and Placement of I/O connectors

In Figure 2, three I/O connectors J1, J2 and J3 are shown. These are two-pin connectors where,

J1represents the signal input, J2 the input power supply and J3 the load. To begin reproducing

the circuit of Figure 2, these connectors will be selected and placed on the worksheet.


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4.2.2. Click on the Basic button from the Component toolbar as indicated in Figure 4. Awindow similar to Figure 5 will appear.

Figure 4: Component toolbar with the Basic button highlighted

Figure 5: Select a Component dialog box showing the Multisim Master Database

4.2.3. From the Select a Component window, click on the drop box under Database.

4.2.4. Select Multisim Master.

4.2.5. Under the Family menu, select Connectors. A list of connectors will appear in themiddle section of the window under Component .

4.2.6. Select HDR1X2. This represents one of the I/Oconnectors in Figure 2 and will belabeled J1 as this is the first connector of its type that has been selected.

4.2.7. Now Click OK, which in on the right hand side of the window.

The worksheet will now be in full view and the cursor will change to indicate that a

component has been selected and is ready for placement on the worksheet.


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4.2.8. Using the page border of the worksheet (shown in Figure 6) as a guide, place thecomponent at the intersection of (Row G, Column 0).

Figure 6: Worksheet showing placement of the HDR1X2 connector

4.2.9. The J1 connector has been successfully placed in the worksheet. However, there are twoother I/O connectors to be placed.

Duplicating Components

4.2.10. At the top right hand corner of the worksheet window, there is a drop box that lists thecomponents that are already in use in the worksheet. This is shown in Figure 7.

Figure 7: Standard Toolbar Showing the List of Components in Use

4.2.11. Click the down arrow to view the list of components that are already in use. Only onecomponent will be seen (HDR1X2) as this is the only component that has been used

thus far.4.2.12. Select HDR1X2 from the list to create the second I/O connector. This component will be labeled J2.

4.2.13. Place the new component at the intersection of (Row C, Column 2).


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4.2.14. Repeat steps 4.2.11to 4.2.13 to select and place the third I/O connector (J3). Place it atthe intersection of (Row F, Column 8) as shown in Figure 8.

4.2.15. Right click on th3 J3 connector and click Flip Horizontal.

Figure 8: Worksheet showing the location of components

Selection and Placement of Variable Resistors

4.2.16. Figure 2 contains two variable resistors. As done previously in 4.2.2, go to the

Component Toolbar and click on the Basic button.



4.2.19. Under the Family menu, select the Potentiometers. A list of connectors will appear inthe middle section of the window under Component .

4.2.20. From the list of components, select 500_LIN as shown in Figure 9.


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Figure 9: Selecting 500_LIN

4.2.21. Click OK .

4.2.22. Place the component at (Row F, Column 1).

4.2.23. Right click on the component and then click Flip Horizontal to reorient this component.

4.2.24. To place the second Variable Resistor, go to the Component Toolbar ► Basic ► Multisim Master Database► Potentiometers ► 5K_LIN as shown in Figure 10.

Figure 10: Selecting 5K_LIN


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4.2.25. Click OK .

4.2.26. Place the component at (Row F, Column 3) as shown in Figure 11.

4.2.27. Right click on the component and then click 90 Clockwise to reorient this component.

4.2.28. The worksheet should resemble that shown in Figure 11.

Figure 11: Worksheet with rotated components

Selection and Placement of Resistors

4.2.29. Figure 2 contains five resistors. As done previously in 4.2.2, go to the Component Toolbar and click on the Basic button.



4.2.32. Under the Family menu, select the Resistor . A list of connectors will appear in themiddle section of the window under Component .

4.2.33. From the list of components, select 1.0kOhm_5%.

4.2.34. Click OK.

4.2.35. Place the resistor at (Row G, Column 2). Reorient the component by 90° clockwise byright clicking on the component and selecting 90 Clockwise.

4.2.36. Go to the Standard Toolbar and click on the In Use List drop box. Select the1.0kOhm_5% resistor from the list and place it at (Row F, Column 4). Reorient the

component by 90° clockwise.


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4.2.37. Now, select and place the other resistors in the locations identified below.

• 2.2Ohm_5% at (Row E, Column 6) and (Row D, Column 6)

• 180Ohm_5% at (Row C, Column 4)

The worksheet should now resemble Figure 12.

Figure 12: Positioning of Components in the Worksheet

Selection and Placement of Capacitors

4.2.38. Figure 2 contains three electrolytic capacitors. Select a 10uF polarized capacitor and place it at (Row F, Column 2). [Go to the Component Toolbar ► Basic ► CAP_ELECTROLIT ► 10uF-POL , etc.]

4.2.39. Reorient the component by flipping it horizontally. [Right click on the component andselect Flip Horizontal]

4.2.40. Now, select and place the other two 470uF capacitors at (Row E, Column 7) and (RowC, Column 3) respectively.

The worksheet should now resemble Figure 13.


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Figure 13: Adding Capacitors to the Worksheet

Selection and Placement of Diodes

4.2.41. Figure 2 contains two diodes. Select the two 1N914 diodes in a manner similar to that ofthe other components. [Go to the Component Toolbar ► Diode Button ► Diode ►

1N914, etc.]

4.2.42. Place one diode at (Row E, Column 4) and the other at (Row D, Column 4).

4.2.43. If necessary, reorient the components.

Selection and Placement of Transistors

From Figure 2, there are just three more components to be placed, which are the three transistors:2N4401, TIP31A, TIP32A.

4.2.44. From the menu bar at the top of the worksheet window, select Place ► Component as

shown in Figure 14.

4.2.45. A window similar to that of Figure 15 will appear. Click on the Search tab, which willopen the Search Component window as shown in Figure 16.


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Figure 14: How to Search for a Component (a)

Figure 15: How to Searching for a Component (b)


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Figure 16: Search Component Window

4.2.46. You are required to search for the following components: TIP31A, TIP32A and2N4401. Type the name of the component in the area shown and click on search.

4.2.47. A window similar to Figure 17 will appear. For the TIP31A and TIP32A, no descriptorsfor these components will be provided since they are not in the database.

Figure 17: Search Component Result Window

In each case, click on the Back button and perform the new search. For the 2N4401, there

will be a search result as shown in Figure 18.

Figure 18: Search Component Result Window for 2N4401


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4.2.48. Click OK. The Select a Component Window will appear as shown in Figure 19. Selectthe desired component and place it at (Row F, Column 4) in your worksheet.

Figure 19: Select a Component Window - Transistor

At this point, the worksheet should resemble that of Figure 20.

Figure 20: Snapshot of the Worksheet after 2N4401has been added


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4.3. Modifying Component Parameters in Multisim 7

When using the Multisim 7 software to create a circuit schematic, not all of the required

components will be contained in the software database. For example, when a search was

done for TIP31A and TIP32A, no result was found. As such, the required components will

have to be created. One of two things can be done.

a)

Create a totally new component from scratch:

In this case the Component Wizard will have to be used. Instructions on how to

create a new component from scratch is provided in the document “Creating a

component in MultiSim.pdf” which can be found on the myeLearning website.

b)

Identify a similar component in the database and modify it to meet the required

specifications.

This section demonstrates how an existing component in the database can be modified.The 2SC2786 transistor will be modified to create the TIP31A since their parameters are

similar.

4.3.1. From the menu bar at the top of the worksheet window, select Tools ► Database Management. The window shown in Figure 21will appear.

Figure 21: Database Management Window

4.3.2. Choose the Component tab and select the component to be edited from the list. In thiscase, select Transistors ► BJT_NPN. A list of the available BJT_NPN transistors will

appear as shown in Figure 22.


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Figure 22: Selecting 2SC2786 transistors

4.3.3. Select 2SC2786. This transistor is similar to the TIP31A; therefore this transistor will bemodified.

NOTE: It is not desired that the existing component in the MASTER Database is permanently

modified. Thus, a copy of the component will be created and this copy will be modified.

4.3.4. Click on the Copy tab at the bottom right hand corner of the Database Management window as shown in Figure 22. A window similar to that shown in Figure 23 will

appear.

Figure 23: Select Destination Family Name Window


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4.3.5. Select the TRANSISTORS Group, and then click Add Family. A window similar toFigure 24 will appear.

Figure 24: New Family Name Dialog Box

4.3.6. For the family name, type BJT_NPN and then click OK . A window similar to Figure 25will appear. The new family BJT_NPN will now appear under the TRANSISTOR Group.

Figure 25: New family name displayed under the Transistor Group

4.3.7. Highlight the new family and then click OK . This will take you back to the Database Management window, where the component to be modified was first selected. See

Figure 26.

4.3.8. Go to the scroll bar on the left hand side of the window.

4.3.9. Scroll down until the USER tab is within view and select it. The window shown inFigure 27 will now appear.


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Figure 26: User tab in Database Management

Figure 27: Finding copied component in created Family

4.3.10. Within the Family Tree box , click TRANSISTORS then BJT_NPN . A copy of the

2SC2786 transistor will be shown within the component list.

NOTE: A copy of the component 2SC2786 has now been created. This component can be freely

modified without affecting the original file stored in the MultiSim 7 software database. Refer to

the specification sheet for the TIP31A to obtain the parameters that are to be used in

modifying the component.


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4.3.11. Go to the bottom right hand side of the Database Management window and click Edit.A window similar to that shown in Figure 28 will appear. Data under each of the tabs

shown has to be modified.

Figure 28: Component Properties Window - General Tab for TIP31A

4.3.12. Under the General tab, change the name of the component to TIP31A.

4.3.13. Next, go to the Model tab as shown in Figure 29.

Figure 29: Component Properties Window - Model Tab for TIP31A


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4.3.14. Set the order of the pins to 1, 2, and 3 in the Pin Mapping Table as shown in Figure 29.

4.3.15. Next, go to the Footprint tab as shown in Figure 30.

Figure 30: Footprint tab in TIP31A Component Properties

Refer to the last page of the TIP31A specification sheet for the package type and pin

mapping information.

Package Type: TO-220 (same as database)

Pin 1 – Base, Pin 2 – Collector, Pin 3 - Emitter

4.3.16. Enter the package type information under Footprint Manufacturer\Type and the pinmapping information under Symbol Pin to Footprint Pin Mapping Table as shown in

Figure 30.

4.3.17. Click OK . Then OK again. The Database Management window as shown in Figure 31will now appear with the new component TIP31A.


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Figure 31: New component TIP31A

NOTE: The TIP31A has been successfully created, however the TIP32A must now be created

since it was not found in the database. Refer to the specification sheet for the TIP32A to obtain

the required information.

The 2SA1015 transistor will be modified to create the TIP32A since their parameters are

similar.


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4.3.18. The Database Management window will be open at this point. Scroll up until the MULTISIM MASTER tab is within view and select it as shown in Figure 32.

4.3.19. Select Transistors from the Family Tree box, then BJT_PNP as the 2SA1015 is a pnptransistor.

4.3.20. Now, select 2SA1015 from the Component List .

Figure 32: Copying 2SA1015

In a previous step, a copy of the component was created for modification. A copy of the

2SA1015 will now be created, given that the parameters of the original component are

not to be modified.

4.3.21. On the bottom right hand side of the Database Management window as shown in Figure

32, click Copy. The Select Destination Family Name window as shown in Figure 33 willappear.

Figure 33: Click Add Family button


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4.3.22. Select Transistor from the Family Tree listing.

Note that the BJT_NPN family that was created in the previous section appears under the

Transistors group. For this new component (TIP32A), a new family has to be created.

4.3.23. Click on Add Family on the bottom right hand side of the window. A window similar tothat of Figure 34 will appear.

Figure 34: Create New Family Name

4.3.24. Enter BJT_PNP in the Enter Family Name dialog box.

4.3.25. Click Ok to exit the New Family Name window then click OK again to return to the Database

Management window as shown in Figure 35.

Figure 35: Ensure that the New Family was created


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4.3.26. Go to the scroll bar on the left hand side of the window until USER is within view and select it.

4.3.27. Within the Family Tree box , click TRANSISTORS then BJT_NPN . A copy of the

2SA1015 transistor will be shown within the component list.

4.3.28. Go to the bottom right hand side of the Database Management window and click Edit.A window similar to that shown in Figure 36 will appear. Data under each of the tabsshown has to be modified.

4.3.29. Under the General tab, change the name of the component to TIP32A.

Figure 36: General tab in TIP32A Component Properties

4.3.30. Next, go to the Model tab as shown in Figure 37.

Figure 37: Model tab in TIP32A Component Properties


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4.3.31. Set the order of the pins to 1, 2, and 3 in the Pin Mapping Table as shown in Figure 37.

4.3.32. Next, go to the Footprint tab as shown in Figure 38.

Figure 38: Footprint tab in TIP32A Component Properties

Refer to the last page of the TIP32A specification sheet for the package type and pin

mapping information.

Package Type: TO-220

Pin 1 – Base, Pin 2 – Collector, Pin 3 - Emitter

4.3.33. Enter the pin mapping information under Symbol Pin to Footprint Pin Mapping Table

as shown in Figure 38.

Note that the information for Footprint Manufacturer\Type for the 2SA1015 differs

from the package type of the TIP32A. This issue will be revisited when creating the

PCB.

4.3.34. Click OK . Then OK again. The Database Management window as shown in Figure 39

will now appear with the new component TIP32A.


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Figure 39: Selecting the newly created TIP32A component

4.3.35. Close the Database Management window.

The two transistors TIP31A and TIP32A have been created. They can now be selected

and placed in the worksheet.

4.3.36. From the menu bar at the top of the worksheet window, select Place ► Component .The Select a Component window will appear.

Selection and Placement of the TIP31A

4.3.37. From the Select a Component window, select USER ► TRANSISTORS ► BJT_NPN family►TIP31A. Place the component in the worksheet by clicking OK . Place at (RowC, Column 6).

Selection and Placement of the TIP32A

4.3.38. From the Select a Component window, select USER ► TRANSISTORS ► BJT_PNP family►TIP32A. Place the component in the worksheet by clicking OK . Place at (Row

F, Column 6)

The worksheet should now look like Figure 40.


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Figure 40: All components placed in workspace

4.4. Wiring the Circuit

All of the components in the circuit schematic of Figure 2 have been placed in the worksheet.

The components must now be wired together. This is done by simply joining the component

leads.

It must be noted that the components were placed in predetermined positions on the worksheet.

This will minimize the complexity of the wiring process. It is strongly recommended that the

layout for the circuit schematic, to be created in Multisim, is sketched on paper beforehand. Thiswill allow the user to determine the layout of the components in the worksheet when creating the

schematic in Multisim.


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4.4.1. Begin by joining the I/O connector J1 and the variable resistor R1. Click on the top leadcoming out from J1 then click on the top lead projecting from R1. A connection should

be automatically created as shown in Figure 41.

Figure 41 - Connecting Components Together

The automatically generated connection can be edited by clicking on the connection and

dragging it to the desired point as shown in Figure 42.

Figure 42: Adjustment of wires- Before and after

4.4.2. Continue in a similar manner to create the following connections.

o J1 – R1 o R7 – U1

o R1 swiper – C1 o R7 – C3

o C1 – R3 o C3 – J2

o R2 – R3 o J2 – Gnd

o R2 swiper – R4 o C3 – Gnd

o Q1 – R3 o U1 – R6

o R4 – U2 o R6 – R5o D1 – R4 o R5 – C2

o D2 – D1 o R5 – U2

o U1 – D2 o C2 – J3

o R7 – D2 o J1, R1, R3, Q1, U2 + J3 – Gnd


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Conclusion:

You have just completed the process of entering a schematic into the software environment. This is the

first of two stages that allows you to generate a Printed Circuit Board (PCB) for your circuit design. The

second stage will be undertaken in PCBLAB2 so ensure your circuits are properly saved as they will be

needed in PCBLAB2.

End of PCBLAB1: Introduction to

PCB Design using Multisim

PCBLAB1 Inlab Sep 18 Intro to PCB Design Using Multisin 7

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Transcript of PCBLAB1 Inlab Sep 18 Intro to PCB Design Using Multisin 7