Difference between revisions of "ESim/C2/Mapping-Components-with-Footprints/English"

Opening Slide

Learning Objectives

• Map components with footprints using CvPcb.
• Generate netlist for PCB design.

System Requirements

• eSim version 1.1.2

Prerequisites

• To create circuit schematic in eSim.
• To simulate the netlist in eSim.

If not, watch the prerequisite eSim Spoken Tutorials on this website.

To open a project

Click on Open project

Double click on Downloads

>>

Double click eSim-1.1.2 folder

>>

Double click Examples

>>

Click on 7805VoltageRegulator

>>

Click on Open

Then browse to the directory where you have installed eSim.

I will double-click on Downloads.

Double-click on eSim hyphen 1.1.2.

Double-click on Examples.

Click on 7805VoltageRegulator.

Click on Open button at the bottom right corner.

Click on Open Schematic

To open the schematic, click on Open Schematic button on the left toolbar.

Scroll key or press F1 to zoom in

Point the cursor to V1 (Sine) block and

Point the cursor to Lm_7805 block.

I will zoom into the schematic.

This circuit uses AC sine wave as input.

And Lm_7805 subcircuit as a voltage regulator.

Click on Simulation

>>

Point cursor on v(in1,in2) ngspice plot

>>

Point cursor on v(out) ngspice plot

We have given the AC signal as input.

We can see the rectified 5 volts DC output.

Switch back to the eSim main window

I will switch back to eSim Schematic Editor.

Hover the mouse over plot_v1 , In1, In2 , sine

These components are not required for PCB designing.

Right click on sine source

>>

select Delete Component option

Right click on plot_v1 i.e U1 component

>>

Select the Delete Component option

Right-click on sine source.

Select the Delete Component option.

Right-click on plot_v1 i.e. U1 component.

And select the Delete Component option.

Show DeletedProbesAndLabels.sch

Click on Place component

>>

Click on editor.

Click anywhere on the editor.

Type Conn in Filter field

Select Conn underscore 01x02

Click on OK

Click on Conn underscore 01x02.

Click on OK button at the bottom right of the Component Selection window.

Click once, anywhere on the right hand side of the schematic.

Click once to place the connector on the right side of the schematic.

Click on editor

Click anywhere on the eSim Schematic Editor window

We have already selected Place component tool.

Click anywhere on the eSim Schematic Editor window.

Type Screw_Terminal

>>

select Screw_Terminal_01x02 from the list.

>>

Click OK

Click once to place the Screw underscore Terminal underscore 01x02 on left side.

Click on Screw underscore Terminal underscore 01x02 from the list.

Click OK button at the bottom right corner of Component Selection window.

Click once to place the connector on the left side of the schematic.

Right click on Screw_Terminal_01x02

>>

Click on Orient Component,and select Mirror || option.

Right-click on Screw underscore Terminal underscore 01x02 component.

Select Orient Component from the drop-down menu and select Mirror || option.

Connecting wires to the schematic

We have learnt to place wires earlier in this series.

You can refer to the prerequisite tutorials, if required.

Let us connect pin 1 of Screw_Terminal_01x02 to the wire connecting D3 and D4.

Show rest of the connected wires

I have connected rest of the nodes to their respective connectors.

Perform Annotation and ERC

Let us Annotate the schematic and perform ERC for the circuit schematic.

Press Ctrl and S key together.

Press Ctrl and S keys together to save this schematic.

We will now learn how to map the components with their footprints.

Footprint is the layout of a component which is placed on the Printed Circuit Board.

Click Run Cvpcb to associate components and footprints button.

Click on the Run CvPcb to associate components and footprints button at the top of the eSim Schematic Editor.

This opens Cvpcb window.

If you’re using Cvpcb for the first time, you will get a confirmation box.

Here, click on the OK button.

If you get another dialog box titled Confirmation, click on No button.

Hover the cursor over the leftmost panel

The left panel shows the Libraries of the footprints.

Hover the cursor over the middle panel

Hover the cursor over the first column of the middle panel

Hover the cursor over the second column of the middle panel

Hover the cursor over the third column of the middle panel

The middle panel is divided into 3 columns.

The first column in the middle panel shows the serial number.

The second column in the middle panel shows the reference ID of the components used in the schematic.

The third column in the middle panel shows the values of the corresponding components, if any.

Hover the cursor over right most panel

The right panel gives a list of footprints available in the libraries.

Hover the cursor to show Filter options

Hover the cursor over Filter footprint list by keywords.

>>

Hover the cursor over Filter footprint list by pin count.

>>

Hover the cursor over Filter footprint list by Library.

This will filter the footprints by keywords.

This will filter the footprints by pin count.

This will filter the footprints by the library.

Click on Filter footprints list by library

If any other filters other than Filter footprints list by library are selected, please uncheck them.

Click on C1

Click on Capacitors_THT from the leftmost panel

Click on Capacitors_THT from the leftmost panel for selection of footprints of Through-hole capacitors.

Hover the cursor on the right panel

Select any footprint from the right most panel

>>

click View selected footprint

To do so, select any footprint from the right panel.

Click on View selected footprint from the top panel.

This will open footprint window which displays the image of the selected footprint.

Select Capacitors_THT:CP_Radial_D5.0mm_P2.50mm>> Double-click on it

Let us locate the footprint with D 5.0 mm and P 2.50 mm, double click on it to assign this footprint.

Click on Connectors_Terminal_Blocks on the left most panel >>

Locate TerminalBlock_Altech_AK300-2_P5.00mm in the right most panel

Double click

Click on J1, click on Connectors_Terminal_Blocks from the leftmost panel.

Locate TerminalBlock_Altech_AK300-2_P5.00mm in the rightmost panel.

Double-click on it to assign this footprint to J1.

Click on Pin_Headers on the left most panel >>

Locate Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm from the right most panel >>

Double click

Click on J2, click on Pin_Headers from the leftmost panel.

Locate Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm from the rightmost panel.

Double-click on it.

Click on Lm_7805

Click on TO_SOT_Packages_THT on the left most panel >>

Locate T0-220-3_Vertical from the right most panel >>

Double click on T0-220-3_Vertical

Click on Lm_7805

Click on TO_SOT_Packages_THT from the leftmost panel.

Locate T0-220-3_Vertical from the rightmost panel.

Double-click on it to assign this footprint.

I have mapped rest of the components with their appropriate footprints.

Click on Save footprint association in schematic component footprint fields at left corner of the top toolbar.

Click on Save footprint association in schematic component footprint fields at the left corner of the top toolbar.

It assigns the selected footprints to the components present in the schematic.

Switch from CvPcb to eSim Schematic Editor window.

I will go back to the eSim Schematic editor window.

Click on Generate netlist

Click on Generate netlist button at the top of eSim Schematic Editor window.

Click on Pcbnew tab

Check Default option

Click on Generate

Click on Pcbnew tab.

Check the option Default format.

Click on Generate button.

Click on Save button at the bottom right corner

Then click on Save button at the bottom right corner.

This is crucial for Printed Circuit Board designing.

Let us summarize.

Summary

• Map components with footprints using CvPcb.
• Generate netlist for PCB design.

Forum

FOSSEE Forum

Textbook Companion

Acknowledgment

http://spoken-tutorial.org

For more details, visit this website.

Thank you.