ESim/C2/PCB-Layout-for-Astable-Multivibrator/English-timed

Time	Narration
00:01	Welcome to the spoken tutorial on “PCB Layout for Astable Multivibrator”.
00:07	In this tutorial, we will learn to - Create a PCB layout for an Astable Multivibrator and Generate Gerber files.
00:18	To record this tutorial, we will use- Ubuntu Linux OS 16.04 eSim version 1.1.2
00:29	To practice this tutorial, you should know to: Create a Schematic in eSim. Assign components to footprints and Set design parameters for PCB layout.
00:43	If not, please see the prerequisite eSim tutorials on this website.
00:48	Earlier in this series, we learnt how to Create a Schematic in eSim Map footprints Set design parameters for a PCB layout.
01:01	I am going to reinforce the idea with the example of an Astable Multivibrator.
01:07	Now watch me for the next one minute.
01:11	A considerable part of this activity has been fast forwarded.
01:16	I am adding connectors and mapping the components with their footprints.
03:29	I have set the design rules, drawn the board outline and placed a few tracks.
03:36	The partially made layout is available in the Code files link.
03:41	Pause the video to download and extract the code files to your Desktop.
03:47	We will use the downloaded code file to practice the rest of the tutorial.
03:52	Now launch eSim.
03:55	I have already opened eSim. Click on Open Project on the left toolbar.
04:02	Browse to Desktop, click on ASM underscore PCB. Then click on the Open button at the bottom right corner.
04:12	Double-click on ASM underscore PCB.
04:16	Click on Open Schematic button on the left toolbar.
04:22	The schematic for Astable Multivibrator opens up.
04:26	Click on PCB new Tool in the top toolbar.
04:31	Pcbnew Layout Editor window opens up.
04:35	I have already placed tracks for most of the airwires.
04:40	Now, let us see how to convert the remaining airwires into tracks.
04:46	Under the Layer tab on the right side of the Pcbnew window, click once on B.Cu.
04:53	Click on Place button in the top toolbar and then select Track from the menu.
05:01	Zoom into the Layout editor using the F1 key.
05:05	This can also be done using the scroll key of the mouse.
05:10	Let us now place tracks for connecting capacitor C1 to LED1.
05:16	Click on node 1 of C1.
05:21	And drag the cursor to node 2 of LED1.
05:25	Double-click on node 2 of LED1 to complete the track.
05:31	Press ESC key. Now let us place a ground plane to connect all the ground nodes.
05:39	Click on the Add filled zones button on the right of the Pcbnew window.
05:45	Click once, slightly above the top-left corner of the board outline.
05:52	Now, let’s place the ground plane on the Bottom Copper layer.
05:56	To do so, click on B.Cu under Layer column.
06:02	Then click on GND under Net column.
06:07	Click on the OK button at the bottom right corner of the Copper Zone Properties window.
06:14	Drag the cursor with the pencil icon horizontally towards the right.
06:20	Click once, slightly above the top-right vertex of the outline.
06:26	Let us move this cursor vertically, towards the bottom-right vertex of the board.
06:32	Click once slightly below the bottom-right vertex.
06:36	We shall now finish drawing a rectangular ground plane outline.
06:42	Note that we have to double-click to finish the rectangular ground plane outline.
06:48	I have finished the ground plane outline.
06:51	Note that we have to ensure that the ground plane outline lies outside the board outline.
06:59	Right-click inside the board outline.
07:03	Click on Fill or Refill all zones button from the drop-down menu.
07:09	We have successfully added a ground plane to the board.
07:14	Press Esc key to exit the Add filled zones tool.
07:19	Let us now perform Design Rule Check i.e DRC, for the layout we created.
07:26	Click on Perform Design Rules check present at the top of the Pcbnew toolbar.
07:33	Click on Start DRC.
07:37	This checks if any design element violates the design parameters set earlier.
07:44	I have no errors in my design.
07:48	Click the OK button at the bottom right corner, to exit the DRC Control window.
07:55	Let us press Ctrl and S keys together to save our work.
08:01	We will now create gerber files for this board.
08:05	Click on the Plot button at the top of the Pcbnew toolbar.
08:10	Let us select the layers.
08:13	Click on the tab below Plot format and select Gerber out of the 6 options.
08:20	Let us select the layers for which we want the gerber files.
08:25	I will select B.Cu, F.Silks and Edge.Cuts by clicking on the boxes to the left.
08:37	Click on the Browse button at the top right corner of Plot window.
08:42	Let us navigate to the desired directory where we wish to save the gerber files.
08:47	Click on the Desktop. Double-click on ASM underscore PCB.
08:53	Now click on the Open button at the bottom right of the Select Output Directory window.
09:00	Click on No button in the Plot Output Directory window.
09:05	Now click on the Plot button at the bottom of the Plot window.
09:10	Acknowledgement messages will appear in the Messages window.
09:14	Now, let us generate the drill file in gerber format for our designed board.
09:19	Click on Generate Drill File at the bottom of the Plot window.
09:24	Select the Millimeters option from the Drill Units section.
09:29	Select the Gerber option under the Drill Map File Format section, if not selected.
09:37	Select the Absolute option from the Drill Origin section, if not selected.
09:43	We will leave the rest of the settings as they are.
09:47	Click the Drill File option at the right of the Drill Files Generation window.
09:53	An acknowledgement message will appear in the Messages window.
09:58	Click on the Close button of the Drill Files Generation window.
10:04	Click the Close button at the bottom right corner of the Plot window.
10:09	Let us save our work by pressing Ctrl and S keys simultaneously.
10:16	Now we will view the gerber files created.
10:20	Open the terminal by pressing Ctrl, Alt and T keys together.
10:26	Type gerbview and press the Enter key.
10:31	Click on File at the top left corner, and select Load Gerber File option.
10:39	Let us browse to the directory where we had saved our gerber files.
10:44	I will click on Desktop. Then double-click on ASM underscore PCB.
10:52	Press Ctrl and A keys simultaneously to select all the gerber files.
10:59	Click on the Open button at the bottom right corner of the Open Gerber file window.
11:05	We can see the PCB Layout that we created in Gerber format.
11:11	Let us summarize.
11:13	In this tutorial, we learnt to- Create a PCB layout for an Astable Multivibrator. Generate Gerber files.
11:23	Please post your timed queries in this forum.
11:27	Please post your general queries on eSim in this forum.
11:32	FOSSEE team coordinates the Lab Migration project.
11:36	FOSSEE team coordinates the Circuit Simulation Project.
11:41	Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this website.
11:48	This is Saurabh from IIT Bombay, signing off. Thank you.

Contributors and Content Editors

Pratik kamble