KiCad/C2/Designing-printed-circuit-board-in-KiCad/English-timed

Time	Narration
00:01	Dear Friends, 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 on 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 the 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 the 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 summarizes 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.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14