Kicad continues….

66.Click on “Save current part into current loaded library (in memory)” on the top
toolbar.
67.Click on “Save current loaded library on disk (file update)” on the top tool bar.
68.Click “yes” on the confirmation message.
69.You can now close the “Libedit” window.
70.Return back to the “EeSchema” window.
71.Repeat steps 14 to 20, however this time choose “conn” and “MYCONN3”.
72.Your newly created part will appear. Choose a location near the second resistor to
place this component. Press the ‘y’ key to mirror it on the y axis.
73.The component identifier “J?” will appear under the “MYCONN3” label. Right click
on “J?” and click on “move field”. Reposition “J?” to under the pins.
74.Click on the “Add powers” button on the right toolbar.
75.Click above the pin of the 1k resistor.
76. In the “Component Selection” click on list all.
77.Scroll down and select “VCC” in the “Select Part” window.
78.Click above the pin of the 1k resistor to place the part.
79.Click above the VDD pin near the microcontroller.
80. In the “Component Selection history” select “VCC” and click again next to the VDD
pin.
81.Repeat again and place the VCC pin above the VCC pin of “MYCONN3”.
82.Repeat steps 74 to 76 but select GND this time.
83.Place the GND pin under the GND pin of “MYCONN3”.
84.Place the GND symbol little to the right and below the VSS pin of the
microcontroller.
85.Click on the “Add wires” on the right toolbar **Careful not to pick “Add bus” which
appears directly beneath but has thicker lines**.
86.Left click on the little circle on the end of pin 7 of the microcontroller and then on the
little circle on pin two of the LED.
87.Repeat process to wire up the other components as below.
88.When wiring up the VCC and GND symbols, the wire should touch at the bottom of
the VCC symbol, and in the middle top of the GND symbol.
89.Label the nets by clicking on the “Add wire or bus label” button on the right toolbar.
90.Click in the middle of the wire between the microcontroller and the LED.
91.Enter the name “uCtoLED”.
92.Click near the circle (little to the right) of pin 7 to place the net name.
93.Name the wire between the resistor and the LED to “LEDtoR”.
94.Name the wire between “MYCONN3” to the resistor as “INPUTtoR”.
95.Name the line on the right of the 100 ohm resistor as “INPUT”.
96.Name the line from pin 6 as “INPUT”. This creates an invisible connection between
the two pins labelled “INPUT”. This is a useful technique when connecting wires in a
complex design where drawing the lines would make the drawing very messy.
97.You do not have to label the VCC and GND lines, the labels are implied from the
power objects they are connected to.
98.The program automatically checks for errors therefore any wires that are not
connected may generate a warning. To avoid these warnings you can instruct the
program that the unconnected wires are deliberate.
99.Click on the “Add no connect” flag button on the right toolbar.
100.Click on the little circle at the end of lines 2, 3, 4 and 5.
101.To add comments on the schematic use the “Add graphics text (comment)” on the
right toolbar .
102.The components now need to be given unique identifiers. To do this click on
“Schematic Annotation” button.
103.In “EESchema Annotation” select “Current Sheet” and “all components”.
104.Click on “Annotate”.
105.Click “yes” for the confirmation message.
106.Notice how all the “?” on the components have been replaced with a number.
Each identifier is unique. In our example “R1”, “R2”, “U1”, “D1” and “J1”.
107.Click on the “Schematic Electric Rules Check” button. Push the “Test ERC” button.
108.This will generate a report to inform you of any errors or warnings such as wires
being disconnected. You should have 0 Errors and 0 Warnings. A small green
arrow will appear in the location of the error if you have made a mistake. Check
“Write erc report” and press the “Test ERC” button again to receive more
information about the errors.
109.Click on “Netlist generation” on the top toolbar.
110.Click “Netlist” then on “save” to the default file name.
111.Click on “Run Cvpcb” on the top toolbar.
112.Cvpcb permits you to link footprints to components.
113.In the light blue screen select “D1” and scroll down in the light green screen to
“LEDV” and double click on it.
114.For “J1” select the “3PIN_6mm” footprint.
115.For “R1” and “R2” select the “R1” footprint from the light green screen.
116.Select 8dip300 for “U1”.
117.Click on “files”->”Save netlist”. The default “tute1.net” is fine therefore click save.
118.Save the project by clicking on “files” -> “Save Schematic Project”.
119.Switch to KiCad main window.
120.Select “Browse” -> “Browse Files”.
121.If an error message appears, choose your text browser. Most computers have one
at “c:\windows\notepad.exe”.
122.Select the “tute1.net” file. This will open your netlist file. It describes which
components and which pins are connected to which pins.
123.Now return back to the “EeSchema” window.
124.To create a bill of materials click on the “Bill of materials” button on the top toolbar.
125.Click on “Create List” and the on “Save”.
126.To view the file repeat step 120 and select “tute1.lst”.
127.Now click on the “Run Pcbnew” button on the top toolbar.
128.The “Pcbnew” window will open.
129.Click “OK” on the error message for the file not existing.
130.Click on “files” -> “Save board”.
131.Click on “page settings” button on the top toolbar.
132.Select “paper size” as “A4” and enter “title” as “Tute 1” .
133.Click on “Dimensions” -> “Tracks and Vias”.
134.Set the settings so that they correspond to your PCB manufacturing capabilities.
(consult your PCB manufacturer for this information.) For our example increase
clearance to 0.0150”.
135.Click on the “Read Netlist” button on the top toolbar.
136.Click the “Select” button select “tute1.net” and click on “open” and then click the
“Read” button. Then click the “Close” button.
137.The components will be placed in the top left hand corner just above the page,
scroll up to see the components.
138.Right click on a component select “move component” and position it in the middle
of the page.
139.Repeat previous step till all the components are in the middle of the page.
140.Make sure that the “General ratsnest not show” button is on.
141.This will display the ratsnest, which is a set of lines showing which pin connects to
which other pin.
142.Move the components around till the ratsnest until you minimise the number of
crossovers.
143.If the ratsnest disappears or the screen gets messy right click and click “redraw”.
144.Now we will connect up all except the ground wires on the “component side” (top
layer).
145.Click on the “Add Tracks an vias” button on the right toolbar.
146.Select “Component” out of the drag down menu on the top toolbar.
147.Click in the middle of pin 1 of “J1” and run a track to the pad “R2”.
148.Repeat this process till all wires except pin 3 of J1 is connected.
149.In the drag down menu on the top toolbar select Copper (bottom layer).
150.Click on “Add tracks and vias” button (step 145).
151.Draw a track between pin 3 of J1 and pin 8 of U1.
152.Click on “Net highlight” button on the right toolbar.
153.Click on pin 3 of J1. It should turn yellow.
154.Click on “Add Zones” button on the right toolbar.
155.Trace around the outline of the board.
156.Right click inside the area you have just traced.
157.Click on “Fill Zones”.
158.Select “Grid” “0.010”, “Pad options:” “Thermal”, “Zone edges orient:” “H,V” and
then click on “Fill”.
159.Your board should look like this.
160.Now select “Edges Pcb” from the drag down menu in the top toolbar.
161.Select the “Add graphic line or polygon” button on the right toolbar.
162.Trace around the edge of the board but remember to leave a small gap between
the edge of the green and the edge of the PCB.
163.Run a design rules check by clicking on “Pcb Design Rules Check”.
164.Click on “Test DRC”. There should be no errors.
165.Click on “List Unconn”. There should be no unconnected.
166.Save your file by clicking on “files” -> “Save board”.
167.To view your board in 3d click on “3D Display” -> “3D Display”.
168.You can drag your mouse around to rotate the PCB.
169.Your board is complete, to send it off to a manufacturer you will need to generate a
GERBER file.
170.Click on “files” -> “plot”.
171.Select GERBER as the “plot format” and click on plot.
172.To view GERBER files go to the main KiCad window.
173.Click on the “GerbView” button.
174.Click on “files” -> “Load GERBER file”.
175.Select the file named “tute1_Copper.pho” and then on “open”.
176.On the drag down menu select “Layer2”.
177.Repeat steps 174 and 175 but this time load “tute1_component.pho”.
178.Repeat steps 176 but choose “Layer3” then steps174 and 175 but this time load
“tute1_SlkSCmp.pho”.
179.This way you can examine the layers that will be sent to production.
There is a extensive footprint library with KiCad, however on occasion you might
find that the footprint that you need is not in a KiCad library. Follows are some
steps for creating a surface mount footprint in KiCad.
180.To create a new PCB footprint switch back to “PCBnew”.
181.Click on “Open Module Editor” on the top toolbar.
182.This will open the “Module Editor”.
183.Click on “select working library” on the top toolbar.
184.For this exercise select the “connect” library.
185.Click the “New Module” button on the top toolbar.
186.Enter “MYCONN3” as the “module reference”.
187.In the middle of the screen a “MYCONN3” label will appear.
188.Under the label will be “VAL**”.
189.Right click on “MYCONN3” and move above “VAL**”.
190.Right click on “VAL**”, select “Edit Text Mod” and rename it to “SMD”.
191.Check the “no display” box.
192.Select the “Add Pads” on the right toolbar.
193.Click on the screen to place the pad.
194.Right click on the new pad and click “edit”.
195.Set the “Pad Num” to “1”, “Pad Size X” to “0.4”, “Pad Size Y” to “0.8”, “Pad Shape”
to “Rect” and “Pad Type” to “SMD”.Click “Ok”.
196.Click on “Add Pads” again and place two more pads.
197.Move the “MYCONN3” and “SMD” labels out of the way so it looks like above.
198.Click on “Add graphic line or polygon” button in the right toolbar.
199.Draw an outline of the connector around the component.
200.Click on “Save Module in working directory” on the top toolbar.
201.You can now return to PCB new and click on “Add modules” button on the right
toolbar.
202.Click in the screen, and the module name window will pop-up.
203.Select the module “MYCONN3” and place it on your PCB design.
This has been a quick tutorial on most of the features in KiCad. For more detailed
instructions there is a detailed help file which can be accessed through all KiCad modules.
Click on help -> help.