Creating Bill of Materials for PSLab using KiCAD

PSLab device consists of a hundreds of electronic components. Resistors, diodes, transistors, integrated circuits are to name a few. These components are of two types; Through hole and surface mounted.

Surface mount components (SMD) are smaller in size. Due to this reason, it is hard to hand solder these components onto a printed circuit board. We use wave soldering or reflow soldering to connect them with a circuit.

Through Hole components (TH) are fairly larger than their SMD counter part. They are made bigger to make it easy for hand soldering. These components can also be soldered using wave soldering.

Once a PCB has completed its design, the next step is to manufacture it with the help of a PCB manufacturer. They will require the circuit design in “gerber” format along with its Bill of Materials (BoM) for assembly. The common requirement of BoM is the file in a csv format. Some manufacturers will require the file in xml format. There are many plugins available in KiCAD which does the job.

KiCAD when first installed, doesn’t come configured with a BoM generation tool. But there are many scripts developed with python available online free of charge. KiBoM is one of the famous plugins available for the task.

Go to “Eeschema” editor in KiCAD where the schematic is present and then click on the “BoM” icon in the menu bar. This will open a dialog box to select which plugin to use to generate the bill of materials.

Initially there won’t be any plugins available in the “Plugins” section. As we are adding plugins to it, they will be listed down so that we can select which plugin we need. To add a plugin, click on the “Add Plugin” button to open the dialog box to browse to the specific plugin we have already downloaded. There are a set of available plugins in the KiCAD installation directory.

The path is most probably will be (unless you have made any changes to the installation);

usr/lib/kicad/plugins

Once a plugin is selected, click on “Generate” button to generate the bom file. “Plugin Info” will display where the file was made and it’s name.

Make sure we have made the BoM file compatible to the file required by the manufacturer. That is; removed all the extra content and added necessary details such as manufacturer’s part numbers and references replacing the auto generated part numbers.

Resources: