Difference between revisions of "KiCad/C2/Designing-circuit-schematic-in-KiCad/English-timed"

| Welcome to the spoken tutorial on “Designing circuit schematic in Kicad”  

|  Let us now see the steps involved in PCB designing

| First step is to create schematic for the desired circuit.  

|Second step is to generate netlist.

|And fourth step is to create board layout for the circuit.  

|In this tutorial we will learn first step, that is,

|Creating a schematic for the desired circuit.  

| We are using Ubuntu 12.04 as the operating system.

| With KiCad version 2011 hyphen 05 hyphen 25 for this tutorial.  

|We will use Astable multivibrator as an example circuit for this tutorial.  

|To start KiCad,

|Go to top left corner of ubuntu desktop screen.  

|Click on first icon i.e the Dash home.  

| In the search bar type 'KiCad', and press Enter.  

|KiCad main window will appear on the screen.  

|To start a new project, click on File and then click on New.

|Give a name to your project. For example, project1.

| Note that project is getting saved with .pro extension  

| Let me resize this window for better view  

| Click on Save.

| Circuit schematics are made in KiCad using EESchema.  

|Let me show you how to start EESchema in KiCad.

| The first tab in the top panel of KiCad main window is called as EESchema or schematic editor

|Clicking on EESchema tab opens the schematic editor.

|An Info dialog box will appear saying it cannot find the schematic.

|Click on Ok.

| Go to right panel of EESchema window.  

|click on Place a component button.  

| Now click on the blank EESchema window.  

| The component selection window will open up.  

| Now we will place 555 timer IC schematic in the EESchema window.  

|In the Name field of component selection window, type 555 and click on Ok.

|It will show the search result as LM555N.

|Select this result and click on OK.  

| To zoom in and out for better view use the scroll button of your mouse.  

| Keep Cursor on Component which you want to zoom in and zoom out.

|You can also use F1 and F2 keys to zoom in and zoom out, respectively.  

| You may or may not see the VCC and GND i.e. the ground terminal on the 555 IC.

|  Click on the Show hidden pins button.  

|Now we will place a resistor in the EESchema window.  

|The Place a component option was previously selected by us.  

|Hence, simply click on EESchema and you will see the component selection window.  

|In the name field, type r and click on OK.  

| Resistor schematic will appear on EESchema which will be tied to cursor.  

|Place the resistor somewhere on the EESchema by a single click   

|We can get the two resistors using the Place a component button.  

|But since we already have a resistor, let us see how to copy a component.   

| To copy a component, right click on the component and choose Copy Component.

|This can also be done more quickly using the keyboard shortcut c.  

|For this, keep the cursor on the component and then press c.  

|  A list of shortcuts can be obtained by pressing Shift and ? (question mark) key.  

|Click on EESchema window to open the component selection window.  

|Next we need two capacitors, electrolytic and ceramic.

| Type cp1 to add electrolytic capacitor and click OK.

|Type c to add ceramic capacitor and click OK.  

|We also need a Light Emitting Diode, know as LED.

|In component selection window type led and click on OK.

| Now we need a power supply i.e.Vcc and Ground terminals.   

| On the right panel of EESchema, click on Place a power port button.  

|Click on List All button and you will see a list of various power notations.  

|Choose +5V (plus 5 volt) and click on OK.

| Place the component by single click on the EESchema window  

|choose ground from the list and click on OK   

|Let me choose the ground terminal  

| We also need a connector to connect the external power supply  

| Click on List All button and you will see a list.

|Choose conn option and click on OK.  

|Scroll down and choose CONN_2 from the list and click on OK.  

| A two terminal connector will appear. It will be tied to your mouse pointer  

|Now we will arrange the components, by moving them to appropriate places.  

|We will use the  shortcut key m for moving the components.  

|To move a component, keep the mouse pointer on a component, say resistor, and then press m.  

| We will place this resistor to the right of IC 555 by a single click on the EESchema.  

| We will use the keyboard shortcut key r for rotating the LED and aligning it vertically.  

| On right panel of EESchema, Click on Place a wire button.  

| We will connect wire by clicking on either nodes of both the resistors.

|Now we will connect the 7th pin of IC 555 to the wire connecting the two resistor.   

|Click on the 7th pin of IC 555 and then on the wire connecting the two resistors.

|I will go to file menu & click on open.

|A Confirmation window opens. Click on Yes.  

|I will choose project1.sch from the desired directory.

|Let me resize this window first .

|and then I will click on open.

|I will click on open.

|On top panel of EESchema, Click on “Annotate schematic” button.  

|This will open the Annotate Schematic window.  

| Click on the Annotation Button.  

|This will warn you that it will annotate only the un-annotate components.  

|Click on OK.

|Click on the Close button on the Annotate schematic window.  

|Click on File  

| and choose Save whole schematic project to save this schematic.  

|Click on File and choose Quit.  

|Now go to KiCad main window.  

|Click on File and choose Quit  

| Let us summarize what we learnt in this tutorial

|In this tutorial we learnt,

|To use EESchema in KiCad for creating circuit schematic  

| Annotation of circuit schematic.  

| Try the following Assignment,

|Explore shortcut keys a, x and y

|Watch the video available at the following link