ESim/C2/Subcircuit-Builder/English-timed

Time	Narration
00:01	Welcome to the spoken tutorial on Subcircuit Builder in eSim.
00:08	In this tutorial, using eSim we will learn to-
00:13	Create a Subcircuit and
00:17	Create a Component Schematic.
00:19	To record this tutorial, we will use- Ubuntu Linux OS version 16.04
00:28	eSim version 2.0
00:32	To practice this tutorial, you should know how to create and simulate a circuit in eSim.
00:40	If not, watch the prerequisite eSim tutorials on this website.
00:46	The subcircuit file always begins with the dot SUBCKT statement.
00:53	Subname is the subcircuit component name.
00:58	N1,N2 are the nodes.
01:02	The subcircuit ends with dot Ends followed by the subcircuit name.
01:09	To launch eSim, you need to double-click on the eSim icon on your Desktop.
01:16	I have already opened eSim.
01:20	Let us now create a Subcircuit for a Half adder.
01:25	On the eSim window, click on the Subcircuit button from the left toolbar.
01:32	A subcircuit tab will open up.
01:36	In the Subcircuit tab, click on the 'New Subcircuit Schematic' button.
01:43	A New Schematic pop up window appears.
01:47	Enter Schematic Name as Halfadder underscore new.
01:54	Click on the OK button.
01:57	Now, click the Yes button in the confirmation dialog box.
02:02	The schematic editor window opens up.
02:06	The user can create a schematic or import an existing schematic.
02:13	We will use the latter method.
02:16	To create a new schematic, you can refer to the previous tutorials in this series.
02:23	I have already created a Half adder circuit using basic gates in eSim. Pause the video here.
02:32	Download the Half Adder Basic Gates project file from the Code file section.
02:38	Extract and save the project file on the Desktop.
02:43	On eeschema, click on the File option from the top menu.
02:49	Select Append Schematic Sheet option.
02:54	In the Confirmation dialog box, click on the Yes button. Click on Desktop.
03:01	Double-click on Half adder basic gates folder.
03:06	The schematic file, sch will be selected.
03:11	Click on the Open button in the file window.
03:15	You can see the schematic of the Half adder is added to the editor.
03:22	Press the F1 key, to zoom in the schematic.
03:25	Now we will connect ports to the input and output terminals of the gates.
03:32	Click on the Place component tool from the right toolbar. Click on the editor.
03:40	In the Filter field, type eSim underscore Miscellaneous.
03:46	Select PORT and press the drop-down arrow.
03:52	Click on Unit A and click on the OK button.
03:58	Port Unit A will be tied to the cursor.
04:02	Place it near the input pin 1 of the XOR gate.
04:07	Similarly, place Port Unit B, near the input pin 1 of the AND gate.
04:14	Place Port Unit C and Port Unit D near the output pin of the XOR gate and AND gate respectively.
04:24	Here the Port unit indicates pins of the subcircuit.
04:30	Unit A is pin 1, Unit B, C and D are the pin number 2, 3, 4 of the subcircuit respectively.
04:41	To rotate the Port C, place the cursor on Port Unit C and press the R key.
04:49	A clarify selection pop-up window appears.
04:53	Select Port U and press the R key. Similarly, rotate Port D.
05:02	Connect the ports to the pins with wires.
05:06	Place the cursor on the pin1 of PORT A and press the W key to start the wire.
05:15	Drag it to the wire connecting the pin 1 of XOR gate and AND gate.
05:22	Click once to end the wire.
05:26	A junction will be placed on the wire.
05:30	Similarly, connect all the ports to the pins as shown here.
05:36	Let us now Annotate the schematic.
05:40	Click on the Annotate schematic components icon from the top toolbar.
05:47	Keep the default settings.
05:50	Click on the Annotate button. Click on the OK button.
05:56	Save the schematic by pressing Ctrl+S keys together.
06:02	Let us generate a netlist for the schematic.
06:06	Click on the Generate netlist icon from the top toolbar.
06:11	Select the Spice tab and check the Default format.
06:17	Click on Generate button and then click the Save button.
06:23	This creates a KiCad netlist file.
06:27	Now, let us go back to the eSim window.
06:31	In the Subcircuit tab, click on the Convert Kicad to Ngspice button.
06:38	You can specify the transient analysis parameters or leave it blank.
06:45	I am leaving these values blank.
06:49	If any Device model or Subcircuit is used, specify them under Device modeling or Subcircuit tab.
06:58	In the KiCad to Ngspice tab, press the Convert button.
07:03	Click on the OK button in the Information dialog box.
07:08	This creates a Ngspice netlist of the subcircuit created.
07:14	You can see, the subcircuit Half Adder new is added to the subcircuit library in the eSim directory.
07:23	Now, let us create a component schematic for the Half Adder subcircuit.
07:29	The components are also referred to as Parts or symbols.
07:34	Go back to the eSim editor of Half Adder schematic.
07:39	Click on the Library Editor icon from the top toolbar.
07:44	The schematic window of the Part Library Editor opens up.
07:49	You can also find the Library Editor option from the Tools option on the top menu.
07:56	Click on the File option from the top menu.
07:59	Click on the Current Library option.
08:03	Choose eSim underscore Subckt option.
08:08	Click on the OK button.
08:11	The current library path of the library selected is displayed at the top of the Part Library editor window.
08:20	To create a new component, click on Create a new Component icon from the top toolbar.
08:28	A Component Properties window opens up.
08:32	Enter the following. Component name as HA underscore new.
08:39	Default Reference Designator as X.
08:43	The designator is different for each eSim component.
08:48	D is used for Diode.
08:51	Q is used for BJT and so on.
08:55	Keep the default settings.
08:57	Click on the OK button in the window.
09:01	Press F1 key to zoom in the schematic name and designator.
09:07	You can add a rectangle, circle, arc or polygons as the component body.
09:15	I will add a rectangle as a component body.
09:20	Click on Add graphic rectangle to component body tool from the right toolbar.
09:27	Click on the editor.
09:30	Click and drag the rectangle.
09:34	Click again to end the rectangle body.
09:38	Arrange the designator and name of the component.
09:42	Place the cursor on the name and designator and press the key M.
09:48	Now add input and output pins.
09:53	Click on Add pins to component tool from the right toolbar.
09:59	Click on the Editor. Pin Properties window will appear.
10:04	Enter: Pin name as A.
10:09	Pin Number as 1.
10:11	Orientation as Right.
10:14	Electrical Type as Input.
10:17	Graphic Style as Line.
10:20	Click on the OK button in the window.
10:24	The pin is tied to the cursor. Connect it as shown.
10:30	Click on the editor again. In a similar way, add Pin number 2 with Pin name as B.
10:40	Click again on the editor. Enter the following.
10:45	Pin name as Sum.
10:48	Pin Number as 3.
10:51	Orientation as left.
10:54	Electrical Type as output.
10:57	Graphic Style as Line.
11:00	Click on the OK button.
11:04	In a similar way add Pin number 4 with Pin name Cy.
11:11	Let us save the schematic symbol.
11:15	Click on File option from the top menu.
11:19	Click on the Save Current Library option.
11:23	Click the Yes button in the confirmation box.
11:28	You can see here, the component is added to eSim underscore Subcircuit library.
11:36	Click once again the Yes button in the confirmation box.
11:41	Close the Part Library editor window.
11:45	This will save the new component to the current library eSim underscore Subcircuit .
11:52	The eSim underscore Subckt library file is found in the Kicad library as shown here.
12:00	As you can see the component HA underscore new is defined here.
12:06	If you want to delete any component, you can also delete the component in this file.
12:13	Now we can verify the created Subcircuit and its component schematic.
12:20	You can use the Half Adder example project from the eSim Examples folder or create a new project.
12:27	You can also download the example HA underscore Test from the Code file section.
12:36	You can verify the component and subcircuit created.
12:41	I have created a new project HA underscore Test.
12:46	The project is already added to eSim window under the Project section.
12:52	Select HA test and click on the Open schematic button from the left toolbar.
13:00	It directs us to the eSim schematic window.
13:04	You can see, the HA underscore new component will be present under eSim_Subckt library.
13:13	Let us go back to the eSim window.
13:16	In the Kicad to Ngspice analysis tab, I have already specified transient parameters.
13:23	In the Source details tab, the voltage sources are assigned as 5 volts.
13:29	In the Subcircuit tab, the path of the Halfadder underscore new is added.
13:36	You can see the Ngspice plots and terminal.
13:41	Since both the inputs are 5 volts, Sum will be 0 and carry will be 5 volts.
13:48	You can also see the values in the Ngspice terminal.
13:53	Close the Ngspice terminal and plots.
13:57	In the Python plot window, check the Sum and Cy node.
14:03	Click on the Plot button.
14:06	The sum is 0 volts and Carry is 5 volts. Close the Python plot window.
14:14	In this tutorial, we learnt how to,
14:17	Create a Subcircuit and Create a Component Schematic.
14:24	Do you have questions in this Spoken Tutorial? Please visit this site.
14:31	For any general or technical questions on eSim, visit the FOSSEE forum and post your question.
14:39	The FOSSEE team coordinates the Circuit Simulation project.
14:44	We give Certificates and Honorarium to the contributors. For more details, please visit this site.
14:53	The FOSSEE team coordinates the Lab Migration project. For more details, please visit this site.
15:02	Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this site.
15:11	This is Gloria N from IIT Bombay signing off. Thank you

Contributors and Content Editors

PoojaMoolya