Difference between revisions of "KiCad/C2/Designing-printed-circuit-board-in-KiCad/English-timed"
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Revision as of 13:00, 9 July 2014
| Time | Narration |
| 00:01 | Dear Friends, |
| 00:02 | Welcome to the spoken tutorial on Designing printed circuit board in KiCad. |
| 00:07 | In this tutorial we will learn, |
| 00:09 | To design printed circuit board in KiCad. |
| 00:12 | We are using Ubuntu 12.04 as the operating system. |
| 00:16 | With KiCad version: 2011 hyphen 05 hyphen 25 for this tutorial |
| 00:25 | Basic knowledge of electronic circuit is a prerequisite for this tutorial |
| 00:30 | The user should also know how to design circuit schematic in KiCad, |
| 00:35 | To do electric rule check , |
| 00:37 | To do netlist generation, |
| 00:39 | To do mapping of components with footprints |
| 00:43 | For relevant tutorials, please visit http://spoken hyphen tutorial.org |
| 00:50 | To start KiCad |
| 00:52 | Go to the top left corner of Ubuntu desktop screen. |
| 00:56 | Click on the first icon (i.e)Dash home |
| 01:01 | In the search bar write KiCad and press Enter. |
| 01:09 | This will open KiCad main window. |
| 01:12 | To open EEschema, go to the top panel and Click on EEschema tab. |
| 01:19 | An info dialog box will appear which says that it cannot find the schematic. |
| 01:25 | Click on OK. |
| 01:28 | I will use the circuit schematic of Astable multivibrator which was created earlier. |
| 01:35 | To do this, I will go to the File menu, click on Open. |
| 01:42 | Choose the folder in which file is saved. |
| 01:49 | Select project1.sch and click Open. |
| 01:56 | I will resize the window. |
| 02:00 | So, now I will click on Open. |
| 02:06 | This will open the circuit schematic. |
| 02:08 | I will zoom in using the scroll button of the mouse. |
| 02:13 | We have already generated the netlist for this circuit, |
| 02:16 | and done mapping of components with corresponding footprints. |
| 02:20 | The next step is to create the printed circuit board layout. |
| 02:26 | To start with this, Click on Run PCBnew button located on the top panel of EEschema window. |
| 02:36 | This will open PCBnew window. |
| 02:39 | An info dialog box appears saying it did not find project1.brd |
| 02:44 | click on OK to close this dialog box. |
| 02:49 | Now you can import the footprints by clicking on Read netlist button on the top panel of PCBnew window. |
| 02:57 | Here the netlist window opens. |
| 03:01 | Keep all the default settings as it is. |
| 03:03 | Click on Browse netlist Files button. |
| 03:07 | This will open Select netlist window |
| 03:13 | I will now resize this window for better view. |
| 03:20 | Select project1.net file from desired directory and click on Open. |
| 03:27 | Click on Read Current Netlist button. |
| 03:30 | It will show warning saying project1.cmp not found. |
| 03:35 | Click on OK. |
| 03:37 | Now close netlist window by clicking on Close button. |
| 03:42 | You can see that all the footprints are imported and placed in top left corner in PCBnew window. |
| 03:49 | Now we need to place all footprints in centre of PCBnew window. |
| 03:56 | For this click on Manual and Automatic move and place of modules button located on the top panel of PCBnew window. |
| 04:08 | Now right click once in the centre of the PCBnew window. |
| 04:14 | Go to Glob Move and Place. Then click on Move All Modules. |
| 04:22 | This will open a Confirmation window. Click Yes. |
| 04:28 | I will zoom in with scroll button of my mouse for better view. |
| 04:35 | You may or may not see white wires connecting the terminals of footprints. |
| 04:39 | If you do not see them, click on Show or Hide board ratsnest button located on the left panel of PCBnew window. |
| 04:51 | White wires are also called as airwires. |
| 04:55 | Now we will arrange the modules such that minimum number of airwires cross each other. |
| 05:01 | Now right click on IC 555 footprint. |
| 05:07 | Go to Footprint options, and click on Move. |
| 05:12 | You can see that footprint is tied to cursor. |
| 05:16 | You can see that the component moves according to the grid displayed in the background. |
| 05:25 | Now click once to place the component wherever required. I am going to place it here. |
| 05:33 | It is possible to change the grid spacing using Grid options drop down menu on the top panel of PCBnew window. |
| 05:44 | For now, we will go ahead with the default value that is Grid 1.270. |
| 05:53 | For moving components you can also use the shortcut key M |
| 05:58 | For example, let me show you how to move the capacitor. |
| 06:02 | Point the cursor on capacitor. |
| 06:05 | Press M. The module will get tied to cursor. You can move it wherever required. |
| 06:14 | To place component click once. |
| 06:17 | To rotate component, Press R. |
| 06:22 | For example, let me rotate the resistor. Place the cursor on the resistor and press R. |
| 06:29 | Similarly you can arrange all the components. |
| 06:32 | I have already arranged footprints to get minimum intersection between airwires. This is shown here. |
| 06:41 | Now we need to convert these airwires in to actual tracks. |
| 06:46 | Under the Layer tab on the right side of the PCBnew window select Back layer if not selected. Back layer is represented by green colour. |
| 07:01 | Layer selected is pointed by small blue arrow. |
| 07:06 | For creating tracks, select Add tracks and vias button located on the right panel of PCBnew window. |
| 07:17 | Now let us click on one of the nodes of R1. |
| 07:22 | Then we will double-click on node of R2 where wire needs to be connected. |
| 07:31 | Similarly we will connect one more wire between Resistor R3 and capacitor C1. |
| 07:38 | Let us click on one of the nodes of R3. |
| 07:41 | Click once to change direction of wire. |
| 07:46 | Then we will double click on the node of C1 where wire needs to be connected. |
| 07:51 | The green track created represents actual copper path created on the printed circuit board. |
| 07:59 | It is also possible to change the track width. |
| 08:02 | This can be done by clicking on Design Rules menu option in the menu bar of PCBnew window. |
| 08:11 | Click on Design Rules. |
| 08:14 | Design Rules Editor will open where you can change the track width.
|
| 08:19 | We will change the track width to 1.5. To do this double click on the value of Track Width. Type 1.5 and press Enter. |
| 08:34 | For creating the track, we could also use the X key on the keyboard. |
| 08:39 | Let me show this to you. Keep the cursor over one of the nodes of LED D1. press the key X. |
| 08:48 | Then we will double click on the node of R3 where wire needs to be connected. |
| 08:54 | You can see that the width of the track has increased. In this way you can complete the design of the board. |
| 09:03 | I have already completed the design for this board here. |
| 09:08 | Let me open the completed design board file. |
| 09:19 | We also need to draw the PCB edges for completing this design. |
| 09:25 | For this we need to select PCB Edges option from Layer tab on the right side of PCBnew window. |
| 09:34 | Now click on Add graphic line or polygon button located on the right panel of layout editor window. |
| 09:44 | Now let us create a rectangle around this Printed circuit Board. |
| 09:49 | Click on the Top left side of layout. |
| 09:52 | Move the cursor horizontally towards right. |
| 09:56 | Click once to change direction of line. |
| 10:00 | Move the cursor vertically downwards. |
| 10:04 | Similarly we can complete the rectangle. |
| 10:11 | Let me complete this rectangle. |
| 10:16 | End the rectangle by double clicking left mouse button. |
| 10:24 | Now let us click on File menu and click on the Save option. Please note that this file is saved with the extension .brd |
| 10:38 | This completes the board layout for Astable multivibrator circuit |
| 10:44 | In this tutorial we learnt to design printed circuit board in KiCad using PCBnew. |
| 10:50 | Watch the video available at the following link |
| 10:54 | It summarises the Spoken Tutorial project |
| 10:56 | If you do not have good bandwidth, you can download and watch it |
| 11:00 | The Spoken Tutorial Project Team |
| 11:03 | Conducts workshops using spoken tutorials
|
| 11:06 | Gives certificates for those who pass an online test |
| 11:10 | For more details, please write to contact at spoken hyphen tutorial dot org |
| 11:15 | Spoken Tutorial Project is a part of the Talk to a Teacher project |
| 11:19 | It is supported by the National Mission on Education through ICT, MHRD, Government of India |
| 11:25 | More information on this Mission is available at |
| 11:29 | spoken hyphen tutorial dot org slash NMEICT hyphen Intro |
| 11:35 | This script has been contributed by Abhishek Pawar |
| 11:38 | This is Rupak Rokade from IIT Bombay, signing off. Thanks for joining. |
