Difference between revisions of "ESim/C2/PCB-Layout-for-Astable-Multivibrator/English"

Visual cue

Narration

Opening Slide

Learning Objectives

• Create a PCB layout for an Astable Multivibrator and
• Generate Gerber files.

Systems Requirements

• Ubuntu Linux OS 16.04
• eSim version 1.1.2

Prerequisites

• Create a Schematic in eSim.
• Assign components to footprints and
• Set design parameters for PCB layout.

If not, please see the prerequisite tutorials on this website.

Earlier in this series

• Create a Schematic in eSim
• Map footprints
• Set design parameters for a PCB layout.

I am going to reinforce the idea with the example of an Astable Multivibrator.

Now watch me for the next one minute.

I am adding connectors and mapping the components with their footprints.

I have set the design rules, drawn the board outline and placed a few tracks.

Download Code Files

Pause the video to download and extract the code files to your Desktop.

We will use the downloaded code file to practice the rest of the tutorial.

Click on Open Project >>Browse To Desktop >>

Click on ASM_PCB

I have already opened eSim.

Click on Open Project on the left toolbar.

Browse to Desktop, click on ASM underscore PCB.

Then click on the Open button at the bottom right corner.

Click on ASM_PCB >> click on Open Schematic button from left toolbar.

Click on Open Schematic button on the left toolbar.

Click on Pcbnew shortcut

Click on PCB new Tool in the top toolbar.

Hover cursor over tracks placed

Let us now see how to convert the remaining airwires into tracks.

Hover mouse over B.Cu text

>> Click on B.Cu text

Click on Place >> select Track

Zoom into the Layout editor using F1 key or using your scroll key of the mouse.

Hover Cursor over C1, LED1 and Q1.

This can also be done using the scroll key of the mouse.

Now let us place tracks for connecting capacitor C1 to LED1.

Click on node 1 of C1

>>

Drag the cursor till node 2 of LED1>>

Double click on node 2 of LED1

And drag the cursor to node 2 of LED1.

Double-click on node 2 of LED1 to complete the track.

Click on Add filled zones.

Click once, slightly above the top-left corner of the board outline.

Click on B.Cu under Layer column

Click on GND under Net column

To do so, click on B.Cu below Layer column.

Then click on GND under Net column.

Drag the cursor towards right, horizontally

Click once slightly above top-right vertex of the outline.

Click once, slightly above the top-right vertex of the outline.

Move the cursor vertically towards the bottom-right vertex of the board

>>

Click once on the editor after crossing the bottom-left vertex.

Click once slightly below the bottom-right vertex.

Press esc key

Note that we have to double-click to finish the rectangular ground plane outline.

Hover cursor over ground plane outline

>>

Hover cursor over ground plane outline and board outline.

Note that we have to ensure that the ground plane outline lies outside the board outline.

Right-click inside the board outline.

Click on Fill or Refill all zones

Hover cursor over ground plane

Right-click inside the board outline.

Click on Fill or Refill all zones button from the drop-down menu.

We have successfully added a ground plane to the board.

Click on Perform design rules check

Click on Start DRC

>>

Highlight the messages window

Click on Start DRC.

This checks if any design element violates the design parameters set earlier.

I have no errors in my design.

Click OK

Press Ctrl and S key together

We will now create gerber files for this board.

Click on Plot(HPGL, PostScript or Gerber format) icon

Click on the tab below : Plot format.

>>

select Gerber.

Click on the tab below Plot format and select Gerber out of the 6 options.

>> Click on boxes to the left of B.Cu, F.Silks and Edge.Cuts layers from the provided layer options.

I will select B.Cu, F.Silks and Edge.Cuts by clicking on the boxes to the left.

Click on the Browse button

Browse to desired directory

>>

Click on Desktop>>double click on ASM_PCB

Click on Open.

Click on No

Click on the Desktop. Double-click on ASM underscore PCB.

Now click on the Open button at the bottom right of the Select Output Directory window.

Click on No button in the Plot Output Directory window.

Select the other options as shown here

Click on Plot button at the bottom of the Plot window.

Now click on the Plot button at the bottom of the Plot window.

Hover cursor over the messages in the Messages window

Acknowledgement messages will appear in the Messages window.

Click on Generate Drill File

Select the Millimeters option from the Drill Units section.

Select the Gerber option under the Drill Map File Format section, if not selected.

Select the Absolute option from the Drill Origin section, if not selected.

Select the Millimeters option from the Drill Units section.

Select the Gerber option under the Drill Map File Format section, if not selected.

Select the Absolute option from the Drill Origin section, if not selected.

Select the other options as shown here

Click on Drill File

Hover mouse over Messages window

Click on Close

Click on Close

Press Ctrl and S key at the same time.

Press Ctrl, Alt and T keys together

Textbox on the Terminal:

Windows OS users, click on start -> type “Gerbview” in the search bar and open the Gerbview application

Open the terminal by pressing Ctrl, Alt and T keys together.

Type gerbview >> Press Enter

Type gerbview and press the Enter key.

Click on File>> select Load Gerber File

Browse to the directory where you saved your gerber files earlier.

I will click on Desktop,.

Then double-click on ASM underscore PCB.

Click on Open

Click on the Open button at the bottom right of the Open Gerber file window.

Hover mouse over the PCB layout in Gerber Format

Summary

• Create a PCB layout for an Astable Multivibrator.
• Generate Gerber files.

Forum

FOSSEE Forum

Lab Migration

Circuit Simulation Project

Acknowledgment

http://spoken-tutorial.org

For more details, visit this website.

Previous slide

Thank you.