ESim/C2/Setting-Parameters-for-PCB-designing/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Welcome to the spoken tutorial on “Setting Parameters for Designing PCB”. |
| 00:07 | In this tutorial, we will learn to -
Read a PCB netlist. Draw outline and setup design parameters for a board. Move and orient footprints. |
| 00:22 | This tutorial is recorded using -
Ubuntu Linux OS version 16.04 and eSim version 1.1.2 |
| 00:34 | To practice this tutorial, you should know:
To design and simulate a circuit in eSim. To map components with footprints in CvPcb. To create netlist for PCB Design in eSim. |
| 00:50 | If not, watch the prerequisite eSim tutorials on this website. |
| 00:56 | I have opened eSim on my machine. |
| 00:59 | Let us open 7805VoltageRegulator example. |
| 01:14 | Click on Open Project button from the left toolbar. |
| 01:21 | Click on Desktop. Click on 7805VoltageRegulator. Click on Open button at the bottom right corner. |
| 01:30 | Click on Open Schematic button from left toolbar, to open the schematic. |
| 01:37 | The schematic will open. Click on Cvpcb shortcut at the top toolbar. |
| 01:45 | I have mapped the components with appropriate footprints and generated netlist for it. |
| 01:51 | I will switch back to the eSim schematic editor. |
| 01:54 | Click on Tools at the top toolbar and select the Layout Printed Circuit Board option. |
| 02:02 | If you get a Confirmation box, click on Yes. |
| 02:07 | An empty layout screen is seen in the Pcbnew window. |
| 02:11 | On the top toolbar, click on Read netlist. Netlist window will appear. |
| 02:19 | Click on Browse button, and navigate to Desktop location. |
| 02:25 | Double-click on 7805VoltageRegulator.Click on 7805VoltageRegulator.net. |
| 02:35 | Click on Open button at the bottom right corner of this window. |
| 02:40 | The netlist will be loaded. |
| 02:43 | Click on Read Current Netlist button at the top right corner of Netlist window. |
| 02:49 | If there is an error it will appear in red color in the Messages window. In my case, there are no errors. |
| 02:56 | Click on the Close button at the top right corner of the Netlist window. |
| 03:03 | The footprints mapped with the components appear on layout screen in a bundled manner. |
| 03:09 | Let us draw an outline for the board we are creating. |
| 03:13 | To place an outline for the board on Edge.Cuts layer, right-click on the layout screen. |
| 03:19 | Click on Select working layer. Click on Edge.Cuts. |
| 03:25 | Alternately, working layer can be selected from the right side of the panel. |
| 03:30 | Under the Layer option, working layers of a board are listed. |
| 03:35 | Front Copper and Bottom Copper will be used for placing tracks. |
| 03:41 | Front Silk, Edge.Cuts and Margin layerwill be used for placing text and dimension. |
| 03:49 | Click on the right side of Edge.Cuts layer. A blue arrow will appear next to the Edge.Cuts. |
| 03:59 | Click on Place at the top toolbar of Pcbnew window. |
| 04:04 | Click on Line or Polygon from the menu. |
| 04:08 | A pencil tied to your cursor will appear on the layout screen. |
| 04:13 | We will use this to draw the outline. |
| 04:16 | Click on the layout screen and move the pencil horizontally to a certain extent. |
| 04:22 | Click on the location where we want to finish the line. |
| 04:26 | A yellow line will appear on the layout screen. |
| 04:30 | We will draw a rectangular shaped outline using the method demonstrated. |
| 04:37 | We have created a rectangular shape as the outline for the board. Press Esc key to exit Line or Polygon tool. |
| 04:46 | Now let us separate and place the footprints. |
| 04:50 | I will now zoom in to see the footprints on the layout clearly, using the F1 key. |
| 04:57 | Right-click on Screw underscore Terminal underscore 01x02. |
| 05:04 | Select Footprint J1 on F.Cu and select the Move option. |
| 05:11 | Move the cursor tied to the footprint horizontally towards left. |
| 05:17 | Click once on the layout screen to place the footprint. |
| 05:21 | To properly orient this footprint, right-click on Screw underscore Terminal underscore 01x02. |
| 05:30 | Select Footprint J1 on F.Cu.
Let us select the Rotate + option. |
| 05:40 | Similarly we will move and orient all other footprints, according to our design. |
| 05:46 | All the components should be inside the rectangular outline drawn. |
| 05:51 | Press Shift and ? keys together. |
| 05:56 | This will open all the keyboard shortcuts available under Hotkeys List window. |
| 06:03 | We can use Hotkeys or the demonstrated methods for placing and orienting the footprints. |
| 06:10 | Click on Close button at bottom right corner of the Hotkeys List window. |
| 06:15 | You may or may not see white wires, representing interconnected footprints. |
| 06:21 | If you do not see them, click on Show or Hide board ratsnest button at the panel of Pcbnew window. |
| 06:30 | White wires are called as airwires. |
| 06:34 | I have already moved and oriented the footprints to get minimum intersection between airwires. |
| 06:40 | Let us set the parameters to place tracks on the layout. |
| 06:44 | Click on Design Rules option given at the top side of the toolbar. Click on Design Rules from the menu. |
| 06:53 | We will change the default track width from 0.25 mm to 1.2 mm. |
| 07:00 | Click on the window below Track Width. Let us clear the present value using Backspace key.
Type the number 1.2. |
| 07:10 | This will make all tracks placed in future, of 1.2 millimeter width. |
| 07:16 | You can select the track width according to your requirements. |
| 07:20 | Click on Global Design Rules at the top of the Design Rules Editor window. |
| 07:27 | Click on the tab in front of Min track width. |
| 07:32 | Let us clear the present value using Backspace key. Then type the number 1.2 in this space. |
| 07:42 | This ensures that any track placed on any layer, is of minimum 1.2 mm width. |
| 07:50 | Click on the Ok button at the bottom right corner. |
| 07:54 | Now let us check the drill hole size of X1, that is Lm_7805. |
| 08:02 | Place cursor on Node 1 of X1 and press E key. |
| 08:08 | Pad Properties window: |
| 08:11 | We can see the drill hole properties such as shape, size of this particular pad. |
| 08:17 | We can see the default drill hole size for this particular pad is 1 millimeter. |
| 08:23 | The default drill hole size and shape for different footprints may vary. We can change it according to our need. |
| 08:32 | Click on the Ok button at the bottom right corner of the Pad Properties window. |
| 08:38 | Let us press Ctrl and S keys together to save the work. |
| 08:44 | With this, we come to the end of this tutorial. Let us summarize. |
| 08:49 | In this tutorial, we learnt to :
Read a PCB netlist. Draw outline and setup design parameters for a board. Move and orient footprints. |
| 09:01 | Please post your timed queries in this forum. |
| 09:05 | Please post your general queries on eSim in this forum. |
| 09:10 | FOSSEE team coordinates the Lab Migration project. |
| 09:15 | FOSSEE team coordinates the Circuit Simulation project. |
| 09:20 | Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this website. |
| 09:27 | This is Saurabh from IIT Bombay signing off. Thank you. |
