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This is how you do art in KiCad

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BenchoffBenchoff 02/25/2017 at 17:452 Comments

The entire point of building this badge is to build a desirable badge for DEFCON. There's an oppurtunity for guerrilla marketing and pop-up hardware startups here.

Therefore, the killer feature for this badge is soldermask and silk screen. The soldermask will be beige, and there will be two processes of silk on the back of the badge. The back of the badge will look like this:

This will be popular.

I could easily do this in Eagle. It would take me about two hours. However, on a whim, I'm giving KiCad a try. This is a project far outside what I normally see coming from the KiCad camp. Usually, all the 'artistic' boards I see are made in Eagle or PCBmodE (and rarely Altium). KiCad is mostly functional, and artistic boards are nearly unheard of. That doesn't mean you can't do artistic boards in KiCad - it just takes about ten times longer than it does in Eagle. Here's how you do it.

Vector Art to DXF Export

Step one: have vector art. This is left as an exercise to the reader. I'm using Illustrator instead of Inkscape. I'm also doing this example/tutorial with a single eye/brow, because it's simpler.

Step two: Convert your paths to straight lines. Do this by selecting your paths, then going through the Object -> Path -> Add Anchor Points. Do this many, many times. This adds an anchor point between all the other anchor points on your path. You're effectively doubling the number of anchor points every time you 'add anchor points'

DXF files can't handle Bezier curves, so you need to convert your shape to straight lines. Click on Object -> Path -> Simplify. Check the 'straight lines' button. Click okay.

Now your object is only straight lines. Export this do a DXF file with File -> Export -> Export As... and save it as a DXF. There are options, pay attention to them:

DXF Import to KiCad

Now that we have a DXF file KiCad will understand, we can import it directly into Pcbnew. From Pcbnew, select File -> Import -> DXF File. You can import a DXF file onto any layer, but I suggest selecting a single layer for importing images that you don't use for anything else.

Here's what we get when we import:

If your 'artistic board' consists only of an edge.cuts layer, you're done. If, however, you want artistic silk screen, there's one more thing to do. We need to trace over this import with a filled zone. Select the filled zone tool, and start making fills:

There we go, "art" in KiCad. The process of turning this art into soldermask, silk screen, mask resist, or just plain copper is left as an exercise to Chris Gammell.

A few tips and tricks:

That's it. This how you do art in KiCad.

Discussions

Jon Nordby wrote 10/18/2018 at 13:09 point

Wait... Did you manually trace the imported vector using the fill tool? Or is there a way to get KiCAD to fill it automatically, like with copper fills bounded by edge cuts?

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oshpark wrote 08/02/2017 at 19:31 point

Great post!

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