ESim/C3/Editing-a-Subcircuit/English-timed

Time	Narration
00:01	Welcome to the spoken tutorial on Editing a Subcircuit in eSim.
00:08	In this tutorial, using eSim we will learn to- To edit a Subcircuit. To modify the component schematic.
00:19	To record this tutorial, we will use- Ubuntu Linux OS version 16.04 eSim version 2.0
00:32	To practice this tutorial, you should know To create and simulate a circuit and a subcircuit in eSim.
00:41	If not, watch the prerequisite eSim tutorials on this website.
00:47	To launch eSim, you need to double-click on the eSim icon on your Desktop.
00:53	I have already opened eSim.
00:57	On the eSim window, click on the Subcircuit button from the left toolbar.
01:04	A subcircuit tab will open up.
01:08	In the previous tutorial, we have seen to create a Subcircuit.
01:14	Let us now edit a Subcircuit of a Half adder.
01:19	In the subcircuit tab, click on the Edit Subcircuit Schematic button.
01:25	The Subcircuit library opens up.
01:29	Select the Half underscore adder and click on the Open button.
01:37	The schematic of Half adder subcircuit opens in eeschema.
01:43	Press F1 key to zoom in the schematic.
01:48	Let us connect an additional Inverter gate to the output of the AND gate.
01:54	On eeschema, click on the Place Component tool from the right toolbar.
02:01	Click on the editor. In the Filter field, type eSim underscore Digital.
02:09	Select d underscore Inverter and click on the OK button. Place it below the PORT D.
02:17	The inverter is tied to the cursor. Place it below the PORT D.
02:25	Connect a wire from Pin 3 of the AND gate to Pin 1 of the Inverter gate.
02:33	A junction will be placed.
02:36	Now, we will connect a Port to the Inverter output.
02:41	Click on the Place Component tool from the right toolbar. Click on the editor.
02:49	In the Filter field, type eSim underscore Miscellaneous. Select Port from the list.
02:59	Click on the drop-down arrow. Select Unit E and click on the OK button.
03:08	Place the Port E near the output pin of the Inverter.
03:13	Place the cursor on the Port Unit E and press the R key to rotate.
03:20	In the Clarify selection window, select component Port U and press the R key.
03:27	Connect the output pin of the Inverter to Port Unit E.
03:33	The Port Unit E will be pin 5 of the component schematic.
03:39	Now we will annotate the schematic.
03:43	Click on the Annotate schematic components icon from the top toolbar.
03:49	Keep the default settings. Click on the Annotate button. Click on the OK button.
03:57	Press Ctrl+S keys together to save the schematic.
04:02	To generate a netlist, click on Generate Netlist.
04:07	Select the Spice tab and check the Default Format.
04:14	Click on the Generate button. Then click on the Save button.
04:22	This creates the KiCad netlist of the Half adder subcircuit.
04:28	Let us go back to the eSim window.
04:32	In the Subcircuit tab, click on the Convert Kicad to Ngspice button.
04:39	You can specify the transient analysis parameters or leave them blank.
04:45	I am leaving these values blank. Skip the Ngspice Model and Device Modeling tabs.
04:54	If any device modeling or subcircuit is used, please specify here.
05:00	Press the Convert button in the Kicad to Ngspice tab.
05:05	Click on the OK button in the Information dialog box.
05:10	This creates the Ngspice netlist of the subcircuit.
05:15	An additional port is added to the Half adder subcircuit.
05:20	Hence, the component schematic has to be modified to include pin 5.
05:26	Go back to the Half Adder schematic.
05:30	On the schematic editor, click on the Library Editor icon from the top toolbar.
05:37	It directs us to the Part Library Editor window.
05:42	Click on the File option from the top menu, and click on the Current Library option.
05:51	Scroll down and choose eSim underscore Subckt. Click on the OK button.
06:00	You can see the path of the selected library is displayed on top of the Part Library window.
06:08	Click on the Load component to edit from the current library icon in the top toolbar.
06:16	Click on the Half underscore adder and click on the OK button.
06:24	Place the cursor on Pin 4, Cout.
06:28	Press M key to move the pin and place it just below pin 3.
06:34	Click on Add pins to component tool from the right toolbar.
06:40	Click on the editor. Pin Properties window will appear. Enter Pin name as Out.
06:50	If you wish, you can give any other Pin name of your choice.
06:55	Pin Number should match with the Port Unit name.
06:59	Port E represents Pin 5 of the subcircuit. Enter Pin Number as 5.
07:08	Enter Orientation as left as it is an output pin. Enter Electrical Type as Output.
07:18	Keep Graphic Style as Line.
07:22	You can choose Orientation and Electrical Type based on the requirement of the subcircuit. Click on the OK button.
07:33	The pin is attached to the cursor. Place it below Pin 4 with a single click.
07:40	Now, let us save the schematic symbol. Press Ctrl+S keys together to save the schematic.
07:49	In the Confirmation box click on the Yes button.
07:54	In the second Confirmation box, click on the Yes button
07:59	You can save the component using the Save Current Library to Disc icon from the top toolbar.
08:07	You can select the current library using the Select Working Library option.
08:14	You can delete the component using the Delete option.
08:19	You can also use Update current component in current library option from the top toolbar.
08:27	This will save the modified component to the current library.
08:32	There is an option Create a new component from the current one in the top toolbar.
08:39	This imports the schematic of the components and can be used to create a new one.
08:45	Let us now close the Part Library Editor window.
08:50	Now, let us simulate a circuit with the newly added subcircuit and its component.
08:57	Let us open the Half underscore Adder from the Example folder of eSim.
09:03	On the eSim window, click on the Open Project button from the top menu.
09:09	Locate the directory where eSim is installed and click on the Example folder. Select Half underscore Adder and then click on Open.
09:24	The Half underscore Adder is added to the eSim window under Projects.
09:30	To open the schematic, select Half Adder from Projects.
09:35	Click on the Open Schematic button from the left toolbar.
09:40	It directs us to the schematic editor. Zoom in the schematic by pressing F1 key.
09:49	Let us replace the Half Adder subcircuit with the modified Half Adder component.
09:55	Click on the Place Component tool from the left toolbar. Click on the editor.
10:03	In the Filter field, type eSim underscore Subckt.
10:08	Scroll down and select the Half underscore adder. Click on the OK button.
10:16	Place and connect it as shown here.
10:20	Similarly connect DAC, plot V1 and global label out as shown here.
10:27	Now annotate the schematic using Annotate Schematic Components from the top toolbar.
10:34	Generate the Spice netlist. Refer to previous tutorials to learn annotation and generating netlist of the schematic.
10:44	Save the schematic by pressing Ctrl+S keys together.
10:49	Let us go back to the eSim window.
10:53	Click on Convert Kicad to Ngspice from the left toolbar
10:59	Let us not change the Transient Analysis parameters.
11:04	Click on the Source details tab. Enter 5V for DC source, V1 and V2.
11:13	Skip the Ngspice Model and Device Modeling tab.
11:17	In the Subcircuit tab, click on the ADD button.
11:22	Click on Half underscore Adder and then click on the Open button.
11:29	In the KiCad to Ngspice tab, press the Convert button. Click the OK button in the Information box.
11:40	Now to generate plots, click on the Simulation button from the left toolbar.
11:47	An Ngspice terminal and plot windows open along with a python plot window.
11:53	Since both the inputs are 5 volts, the sum is 0, carry will be 5 volts and the Output will be 0 volts.
12:04	Close the Ngspice plots and terminal windows.
12:08	In the Python plot, check the Sum node,cout node and the Out node.
12:15	Click on the Plot button. You can see the plots for sum, cout and Out nodes.
12:24	Close the Python plot window.
12:27	Let us now summarise. In this tutorial, we learnt- To edit a Subcircuit and To modify the component schematic.
12:40	Do you have questions in this Spoken Tutorial? Please visit this site.
12:46	For any general or technical questions on eSim, visit the FOSSEE forum and post your question.
12:54	The FOSSEE team coordinates the Circuit Simulation project.
12:59	We give Certificates and Honorarium to the contributors. For more details, please visit this site.
13:09	The FOSSEE team coordinates the Lab Migration project. For more details, please visit this site.
13:18	Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this site.
13:26	This is Gloria N from IIT Bombay signing off. Thank you

Contributors and Content Editors

Pratik kamble