View source for ESim/C2/PCB-Layout-for-Astable-Multivibrator/English-timed

{| border="1"
|-
| '''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.

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|01:16
|I am adding '''connectors''' and mapping the '''components''' with their '''footprints'''.

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|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.'''

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|03:47
|We will use the downloaded code file to practice the rest of the tutorial.

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|03:52
| Now launch '''eSim'''.

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|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.

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|04:12
|| Double-click on '''ASM underscore PCB'''.  

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|04:16
|Click on '''Open Schematic''' button on the left toolbar.

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|04:22
| The '''schematic''' for '''Astable Multivibrator''' opens up.

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|04:26
|Click on '''PCB new Tool '''in the top toolbar.

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| 04:31
| '''Pcbnew Layout Editor''' window opens up.

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|04:35
| I have already placed '''tracks''' for most of the '''airwires'''.

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|04:40
|Now, let us see how to convert the remaining '''airwires''' into '''tracks.'''

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|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. 

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|05:05
|This can also be done using the scroll key of the mouse.

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|05:10
|Let us now place '''tracks''' for connecting '''capacitor C1''' to '''LED1.'''

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|05:16
| Click on '''node 1 '''of''' C1.'''

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|05:21
|And drag the cursor to '''node 2 '''of''' LED1.'''

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|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'''. 

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|05:39
| Click on the''' Add filled zones''' button on the right of the '''Pcbnew window.'''

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|05:45
| Click once, slightly above the top-left corner of the '''board outline'''.

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|05:52
| Now, let’s place the '''ground plane''' on the '''Bottom Copper layer'''.

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|05:56
|To do so, click on '''B.Cu''' under''' Layer '''column.

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|06:02
|Then click on '''GND''' under''' Net '''column.

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|06:07
| Click on the '''OK '''button at the bottom right corner of the '''Copper Zone Properties '''window.

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|06:14
| Drag the cursor with the pencil icon horizontally towards the right. 

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|06:20
|Click once, slightly above the top-right vertex of the '''outline'''.

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|06:26
| Let us move this cursor vertically, towards the bottom-right vertex of the '''board'''.

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|06:32
|Click once slightly below the bottom-right vertex.

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|06:36
| We shall now finish drawing a rectangular '''ground plane outline'''.

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|06:42
|Note that we have to double-click to finish the rectangular '''ground plane outline'''.

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|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'''.

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|06:59
|Right-click inside the '''board outline'''.

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|07:03
|Click on '''Fill or Refill all zones '''button from the drop-down menu.

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|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. 

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|07:26
|Click on '''Perform Design Rules check '''present at the top of the '''Pcbnew''' toolbar.

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|07:33
|Click on '''Start DRC. '''

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|07:37
|This checks if any '''design element''' violates the '''design parameters '''set earlier.

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|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.

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|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'''.

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|08:05
| Click on the '''Plot '''button at the top of the '''Pcbnew''' toolbar.

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|08:10
|Let us select the '''layers'''.  

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|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'''.

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|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'''. 

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|08:47
|Click on the '''Desktop'''.  Double-click on '''ASM underscore PCB.'''

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|08:53
|Now click on the '''Open '''button at the bottom right of the '''Select Output Directory '''window.

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|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.

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|10:20
|Open the '''terminal''' by pressing '''Ctrl, Alt '''and''' T '''keys together.

|- 
|10:26
|Type '''gerbview''' and press the '''Enter '''key.

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|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'''. 

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|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'''.

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|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.

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|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'''.

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|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.

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|}