Pratik kamble: Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- |00:01 |Welcome to the spoken tutorial on '''Simulating Astable Multivibrator '''in '''eSim'''. |- | 00:07 | In this tutor..."

2021-06-17T12:14:02Z

Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- |00:01 |Welcome to the spoken tutorial on '''Simulating Astable Multivibrator '''in '''eSim'''. |- | 00:07 | In this tutor..."

New page

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

|-
|00:01
|Welcome to the spoken tutorial on '''Simulating Astable Multivibrator '''in '''eSim'''.

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

Create and '''simulate''' an '''Astable Multivibrator'''.

Understand '''dot cir '''and '''dot cir dot out''' files and

Observe and understand the '''Ngspice terminal'''.

|-
|00:24
| To record this tutorial, we will use-

'''Ubuntu Linux OS '''16.04 and

'''eSim '''version 1.1.2

|-
|00:36
|To practice this tutorial, basic knowledge of electronics is required.

|-
|00:41
|Earlier, we learnt how to create a '''schematic''' for an''' RC circuit.'''

|-
|00:47
| Now I am going to reinforce the idea with an '''Astable Multivibrator circuit.'''

|-
|00:53
| The '''Astable Multivibrator circuit''' is as shown.

|-
|00:57
|Watch me for the next one minute as I create this '''circuit''' in '''eSim'''.

|-
|01:04
|A considerable part of this activity has been fast forwarded.

|-
|01:49
|I am placing a few '''components''' and making a few connections.

|-
|01:54
| It is expected that you know how to create a '''schematic''' in '''eSim'''.

|-
|01:59
| In case you do not know, please watch the prerequisite '''eSim''' tutorials.

|-
|02:50
| The partially made '''circuit schematic''' is available in the '''Code files link'''.

|-
|02:55
| Pause the video to download and extract the '''code files''' on your '''Desktop.'''

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|03:01
| We will use the downloaded '''code file''' to practice the rest of the tutorial.

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|03:06
|Launch '''eSim '''on your machine.

|-
|03:09
| I have already opened '''eSim.'''

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|03:12
| Click on '''Open Project '''button on the left toolbar.

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|03:17
| Browse to the '''Desktop''' location and click on '''AstableMultivibrator.'''

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|03:23
| Then click on the '''Open '''button.

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|03:26
| Click on the''' Open Schematic''' button on the left toolbar.

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|03:31
|Press the '''F1 '''key to zoom into the '''schematic'''.

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|03:35
| If you have zoomed in or zoomed out too much, fit the '''schematic''' back to default.

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|03:41
|To do this, press the '''Esc''' key, and click on the '''View '''option on the top toolbar.

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|03:49
| Select the '''Fit on Screen '''option.

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|03:53
| It will fit the '''schematic''' back to its default resolution. I will zoom in again.

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|04:03
|The wires should be connected end-to-end for '''components''', and not external '''outlines'''.

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|04:11
|I will demonstrate a common mistake now.

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|04:14
|Select the '''Place Wire''' tool.

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|04:17
| I have clicked on one end of '''eSim underscore R'''.

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|04:22
| I will drag it to the exterior outline of the '''eSim underscore LED''' and double-click.

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|04:29
| The empty green box shows that the connection is not proper.

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|04:34
| Press '''Ctrl''' and '''Z''' keys simultaneously to undo the changes just made.

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| 04:40
| Let us properly connect the '''eSim_LED''' present on the right side of the '''schematic'''.

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|04:46
|Click on '''Place Wire '''tool on the right toolbar.

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|04:50
| Click on the unconnected '''node''' of the '''resistor'''. Then drag the cursor till '''node 1''' of '''eSim underscore LED'''

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|05:00
|Click once on the''' eSim underscore LED node '''to place the wire. Press '''Esc''' key.

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|05:07
|Select the '''Place Wire''' tool and click on the''' node 2''' of '''eSim underscore LED'''.

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|05:16
| Drag the cursor till the wire connecting the adjacent '''transistor''' and '''capacitor'''.

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|05:22
| Click once on the existing wire. Now press the '''Esc''' key.

|-
|05:28
|If the wires are placed properly, you will see a green dot where the wires intersect.
This is called a '''junction'''.

|-
|05:37
|Right-click on''' plot underscore v1 '''and select the''' Copy component''' option.

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|05:44
| '''plot underscore v1 '''will be tied to the cursor.

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|05:48
|Drag the cursor near the '''LED '''on the right side.

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|05:53
| Place it next to the''' LED '''by clicking once on the '''editor'''.

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|05:58
|Click on '''Place Global Label''' on the right toolbar, to place a '''global label'''.

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|06:04
| Click once on the '''editor''' screen. Type the text '''LED2 '''and click on''' OK.'''

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|06:14
| '''LED2 global label '''will be tied to the cursor.

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|06:18
| Place the '''LED2 global label''' near the''' LED '''on the right side, by clicking once on the '''editor''' once.

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|06:25
| Rotate the '''global label''' if required.

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|06:30
|Right-click on '''eSim_CP1'''.

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|06:34
| Choose the '''Edit Component''' option, and select '''Value.'''

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|06:39
| Erase the value '''eSim underscore CP1 '''using '''Backspace''' key and type''' 22u.''' Click on '''OK.'''

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|06:49
| Note that we are using '''polarised capacitor'''.

|-
|06:53
| Right-click on '''eSim underscore R'''.

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|06:57
| Place the cursor on '''Edit Component''', and select the '''Value''' option.

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|07:04
| Erase the value '''eSim underscore R '''using '''Backspace''' key and type''' 1k.''' Click on '''OK.'''

|-
|07:13
|We will assign a value to the''' DC source''' later.

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|07:18
| Connect '''plot_v1 '''and '''LED2 global label '''to the '''junction''' as shown.

|-
|07:28
|Press '''Ctrl''' and '''S''' keys simultaneously to save the work.

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|07:33
|Click on '''Annotate Schematic''' tool on the top toolbar.

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|07:38
| Click on '''Annotate''' option, and then on '''OK'''.

|-
|07:43
| Press '''Ctrl''' and '''S''' keys simultaneously to save the work.

|-
|07:48
|Click on''' Perform electrical rules check '''on the top toolbar. Click on '''Run.'''

|-
|07:55
|We can see three warnings regarding '''global label''', which can be ignored.

|-
|08:02
| Click on '''Delete Markers''' and then click on '''Close.'''

|-
|08:08
| More information on '''ERC errors''' is given in the '''Additional Reading Material '''of this tutorial.

|-
|08:15
| Click on '''Generate Netlist''' on the top toolbar.

|-
|08:20
| Click on '''Spice''' tab, and check the '''Default Format''' option.

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|08:26
| Then click on '''Generate''' option, and click on '''Save'''.

|-
| 08:32
|Now I will switch back to''' eSim '''main window.

|-
|08:36
|Double-click on '''AstableMultivibrator.'''

|-
|08:40
| Click on''' Convert Kicad to Ngspice convertor.'''

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|08:44
| Type the values for '''transient parameters''' as shown.

|-
|08:49
|Click on the '''Source details''' tab.

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|08:52
|Type the value of '''DC source''' as '''9'''. You should enter only numeric values of '''voltages'''.

|-
|09:02
| Click on '''Device Modeling '''tab.

|-
|09:05
| Click on the '''Add''' button under '''d1:esim underscore led.'''

|-
|09:11
| Double-click on '''Diode''' folder, select '''LED.lib''' file and click on the '''Open''' button.

|-
|09:20
|Similarly add the '''library files''' for '''d2:esim underscore led'''

|-
|09:26
|Click on the '''Add''' button under '''q1:esim underscore npn.'''

|-
|09:33
| Double-click on '''Transistor''' folder, select '''BC547B.lib''' and click on the '''Open''' button.

|-
|09:42
|Similarly add the '''library files''' for '''q2:esim_npn'''

|-
|09:50
|Now press the '''Convert '''button to convert the''' KiCad netlist '''to''' Ngspice netlist.'''

|-
|09:56
| A confirmation dialog box appears, click on '''OK.'''

|-
|10:01
|Click on '''Simulation '''button on the '''eSim '''toolbar to simulate the example.

|-
|10:08
|'''Ngspice terminal '''and '''plot '''windows open along with a '''Python plot''' window.

|-
|10:15
| '''Ngspice terminal''' shows the values of the '''voltages''' at the '''nodes'''.

|-
|10:21
|'''Ngspice commands''' can be entered to see plots in this '''terminal'''.

|-
|10:27
| Type the following text in the '''Ngspice terminal''' and press the '''Enter''' key.

|-
|10:34
|We can see the '''voltage''' at '''nodes LED1 '''and''' LED2 '''combined in a single plot.

|-
|10:43
|Any error will be displayed on the''' Ngspice terminal''' or the value will be replaced with a question mark.

|-
|10:50
|I will switch to '''Python Plot''' window.

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|10:53
|Click on''' LED1, LED2 '''and''' IN '''check-boxes in the '''Python plot''' window.

|-
|11:02
| Scroll down and click on the '''Plot''' button.

|-
|11:06
|If '''analysis time parameters''' are not set properly, '''Python Plotting''' error will be generated.

|-
|11:13
| For this particular '''circuit, step time''' is in '''milliseconds'''.

|-
|11:18
|Right-click on '''AstableMultivibrator''' and select the '''Refresh''' option.

|-
|11:24
| The '''dot cir''' file shows the '''netist '''file of the '''schematic'''.

|-
|11:29
| It contains the information about the '''node''' connections and values of '''components'''.

|-
|11:35
|The '''cir dot out''' file is passed to '''ngspice''' for running '''simulations'''.

|-
|11:41
| It contains information about the '''device''' and '''subcircuit models''' used in the''' KiCad to Ngspice '''conversion tool.

|-
|11:49
| It also contains the '''analysis time parameters'''.

|-
| 11:53
| Let us summarize.

|-
|11:55
|In this tutorial, we learnt to-

Create and '''simulate''' an '''Astable Multivibrator.'''

Understand '''dot cir '''and '''dot cir dot out''' files.

Observe and understand the '''Ngspice terminal'''.

|-
|12:11
| Please post your timed queries in this forum.

|-
|12:15
|Please post your general queries on '''eSim''' in this forum.

|-
|12:20
| '''FOSSEE''' team coordinates the '''Lab Migration''' project.

|-
|12:24
|'''FOSSEE''' team coordinates the '''Circuit Simulation''' project.

|-
|12:29
|Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this website.

|-
|12:36
|This is Saurabh from IIT Bombay, signing off. Thank you.

|-
|}

ESim/C2/Simulating-an-Astable-Multivibrator/English-timed - Revision history

Pratik kamble: Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- |00:01 |Welcome to the spoken tutorial on '''Simulating Astable Multivibrator '''in '''eSim'''. |- | 00:07 | In this tutor..."