View source for KiCad/C2/Designing-printed-circuit-board-in-KiCad/English-timed

{| border = 1
 |'''Time'''
 |'''Narration'''

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|00:01
|Dear Friends, Welcome to the '''spoken tutorial''' on '''Designing printed circuit board in KiCad'''.

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|00:07
|In this tutorial, we will learn 

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|00:09
|to design '''printed circuit board''' in '''KiCad'''. 

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|00:12
|We are using '''Ubuntu 12.04''' as the operating system  

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|00:16
|with '''KiCad''' version: '''2011 hyphen 05 hyphen 25''' for this tutorial.

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|00:25
|Basic knowledge of electronic circuit is a prerequisite for this tutorial. 

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|00:30
|The user should also know: * how to design '''circuit schematic''' in '''KiCad''' 

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|00:35
|To do '''electric rule check''' 

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|00:37
|To do '''netlist generation''' 

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|00:39
|To do mapping of components with '''footprints'''.

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|00:43
|For relevant tutorials, please visit:
http://spoken hyphen tutorial.org 

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|00:50
|To start KiCad -

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|00:52
|Go to the top left corner of Ubuntu desktop screen.

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|00:56
|Click on the first icon i.e. '''Dash home'''.

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|01:01
|In the search bar, write "KiCad" and press '''Enter'''. 

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|01:09
|This will open '''KiCad main window'''. 

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|01:12
|To open 'EEschema', go to the top panel and click on '''EEschema''' tab.

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|01:19
|An '''Info''' dialog-box will appear which says that it cannot find the schematic. 

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|01:25
|Click on '''OK'''. 

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|01:28
|I will use the circuit schematic of '''Astable multivibrator''' which was created earlier.  

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|01:35
|To do this, I will go to the '''File''' menu, click on '''Open'''. 

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|01:42
|Choose the folder in which file is saved. 

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|01:49
|Select 'project1.sch' and click on '''Open'''. 

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|01:56
|I will '''resize''' the window.

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|02:00
|So, now I will click on '''Open'''.

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|02:06
|This will open the circuit schematic. 

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|02:08
|I will zoom in using the scroll button of the '''mouse'''. 

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|02:13
|We have already generated the '''netlist''' for this circuit 

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|02:16
|and done mapping of components with corresponding footprints. 

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|02:20
|The next step is to create the '''printed circuit board''' layout.

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|02:26
|To start with this, click on '''Run PCBnew''' button located on the top panel of 'EEschema' window.   

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|02:36
|This will open 'PCBnew' window. 

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|02:39
|An '''info''' dialog-box appears saying it did not find 'project1.brd'.

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|02:44
|Click on '''OK''' to close this dialog-box. 

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|02:49
|Now you can '''import''' the '''footprints''' by clicking on '''Read netlist''' button on the top panel of 'PCBnew' window.

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|02:57
|Here the '''Netlist''' window opens. 

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|03:01
|Keep all the default settings as it is. 

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|03:03
|Click on '''Browse Netlist Files''' button.   

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|03:07
|This will open '''Select Netlist''' window. 

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|03:13
|I will now '''resize''' this window for better view. 

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|03:20
|Select '''project1.net''' file from desired directory and click on '''Open'''. 

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|03:27
|Click on '''Read Current Netlist''' button. 

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|03:30
|It will show warning saying 'project1.cmp' not found. 

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|03:35
|Click on '''OK'''.  

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|03:37
|Now close '''Netlist''' window by clicking on '''Close''' button. 

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|03:42
|You can see that all the '''footprint'''s are imported and placed in the top left corner, in '''PCBnew''' window. 

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|03:49
|Now we need to place all footprints in centre of 'PCBnew' window. 

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|03:56
|For this, click on '''Manual and Automatic move and place of modules''' button located on the top panel of 'PCBnew' window. 

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|04:08
|Now, right-click once in the centre of the 'PCBnew' window. 

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|04:14
|Go to '''Glob Move and Place'''. Then click on '''Move All Modules'''.  

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|04:22
|This will open a '''Confirmation''' window. Click '''Yes'''. 

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|04:28
|I will zoom in with scroll button of my '''mouse''' for better view. 

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|04:35
|You may or may not see white wires connecting the '''terminal'''s of footprints. 
 
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|04:39
|If you do not see them, click on '''Show or Hide board ratsnest''' button located on the left panel of PCBnew window. 

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|04:51
|White wires are also called as '''airwires'''. 

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|04:55
|Now we will arrange the modules such that minimum number of airwires cross each other. 

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|05:01
|Now, right-click on '''IC 555 footprint'''. 

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|05:07
|Go to '''Footprint''' options and click on '''Move'''.  

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|05:12
|You can see that the footprint is tied to cursor. 

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|05:16
|You can see that the component moves according to the grid displayed in the background.

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|05:25
|Now, click once to place the component wherever required. I am going to place it here. 

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|05:33
|It is possible to change the grid spacing using '''Grid''' options drop-down menu on the top panel of 'PCBnew' window.  

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|05:44
|For now, we will go ahead with the default value, that is, '''Grid 1.270'''. 

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|05:53
|For moving components, you can also use the shortcut key 'M'. 

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|05:58
|For example, let me show you how to move the '''capacitor'''. 

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|06:02
|Point the cursor on capacitor. 

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|06:05
|Press 'M'. The module will get tied to cursor. You can move it wherever required.  

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|06:14
|To place component click once. 

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|06:17
|To rotate component, press 'R'. 

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|06:22
|For example, let me rotate the '''resistor'''. Place the cursor on the resistor and press 'R'. 

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|06:29
|Similarly, you can arrange all the components.

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|06:32
|I have already arranged footprints to get minimum intersection between airwires. This is shown here. 

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|06:41
|Now, we need to convert these airwires in to actual '''track'''s.

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|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. 

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|07:01
|Layer selected is pointed by small blue arrow. 

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|07:06
|For creating tracks, select '''Add tracks and vias''' button, located on the right panel of 'PCBnew' window. 

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|07:17
|Now, let us click on one of the nodes of 'R1'. 

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|07:22
|Then, we will double-click on node of 'R2' where wire needs to be connected. 

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|07:31
|Similarly, we will connect one more wire between '''Resistor R3''' and '''capacitor C1'''. 

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|07:38
|Let us click on one of the nodes of 'R3'. 

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|07:41
|Click once to change direction of wire.

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|07:46
|Then we will double-click on the node of 'C1' where wire needs to be connected. 

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|07:51
|The green track created represents actual copper path created on the '''printed circuit board'''.

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|07:59
|It is also possible to change the track width. 

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|08:02
|This can be done by clicking on '''Design Rules''' menu option in the menu bar of 'PCBnew' window. 

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|08:11
|Click on '''Design Rules'''. 

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|08:14
|'''Design Rules Editor''' will open where you can change the track width. 

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|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'''.

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|08:34
|For creating the '''track''', we could also use the 'X 'key on the keyboard.

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|08:39
|Let me show this to you. Keep the cursor over one of the nodes of '''LED D1'''. press the key 'X'.

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|08:48
|Then, we will double-click on the node of 'R3' where wire needs to be connected.
 
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|08:54
|You can see that the width of the track has increased. In this way, you can complete the design of the board.

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|09:03
|I have already completed the design for this board here. 

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|09:08
|Let me open the completed design board file.  

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|09:19
|We also need to draw the PCB edges for completing this design. 

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|09:25
|For this, we need to select '''PCB Edges''' option from '''Layer''' tab on the right side of 'PCBnew' window. 

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|09:34
|Now, click on '''Add graphic line or polygon''' button located on the right panel of '''layout editor''' window. 

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|09:44
|Now, let us create a rectangle around this '''Printed circuit Board'''.

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|09:49
|Click on the top left side of layout.

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|09:52
|Move the cursor horizontally towards right.  

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|09:56
|Click once to change direction of line.

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|10:00
|Move the cursor vertically downwards. 

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|10:04
|Similarly, we can complete the rectangle. 

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|10:11
|Let me complete this rectangle. 

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|10:16
|End the rectangle by double-clicking left-mouse-button.

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|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'.

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|10:38
|This completes the board layout for Astable multivibrator circuit.

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|10:44
|In this tutorial, we learnt to design '''printed circuit board''' in '''KiCad''' using 'PCBnew'. 

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|10:50
|Watch the video available at the following link.

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|10:54
|It summarizes the Spoken Tutorial project. 

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|10:56
|If you do not have good bandwidth, you can download and watch it. 

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|11:00
|The Spoken Tutorial project team: 

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|11:03
|Conducts workshops using spoken tutorials. 

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|11:06
|Gives certificates for those who pass an online test. 

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|11:10
|For more details, please write to:
contact at spoken hyphen tutorial dot org. 

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|11:15
|'''Spoken Tutorial''' project is a part of the '''Talk to a Teacher''' project. 

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|11:19
|It is supported by the National Mission on Education through ICT, MHRD, Government of India. 

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|11:25
|More information on this mission is available at: 

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|11:29
|spoken hyphen tutorial dot org slash NMEICT hyphen Intro. 

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|11:35
|This script has been contributed  by Abhishek Pawar.

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|11:38
|This is Rupak Rokade from '''IIT Bombay''', signing off. Thanks for joining.
|
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