ESim/C2/PCB-Layout-for-Astable-Multivibrator/English-timed
From Script | Spoken-Tutorial
| 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. |
