Rapid Prototyping a Voronoi NFC Business Card

I was looking at a pile of old business cards at home.

Wrong address.
Old information.
Dead inventory.

Just wasted money sitting on a desk.

At the same time, I still need business cards constantly because I do a lot of networking. Especially in Japan, where business cards still matter culturally.

But every time I looked at them, I kept thinking the same thing:

Why are business cards still so primitive?

We have:

• AI writing code
• autonomous cars
• robots running warehouses

…and we are still exchanging paper rectangles like cavemen.

Sometimes you see creative ones:

• PCB cards
• engraved metal cards
• lock-pick-shaped cards from security people

Those work because the object itself becomes part of the identity.

That was the direction I wanted.

Not another generic “smart business card”.

I wanted something:

• lightweight
• partially hollow
• NFC enabled
• fast to print
• and unmistakably mine

No wall of text.

Maybe just:

• a logo
• some holes to reduce material
• and an NFC tag that opens URLs directly on someone’s phone

That was the entire idea.

The Structure

I kept remembering this pattern I had seen inside modern engineered parts.

Organic. Skeletal. Almost biological.

Eventually I found it:

Voronoi lattices.

The second I saw it, I knew that was the structure I wanted.

The Workflow

Ironically, the hardest part was not printing.

It was CAD.

I do not master:

• :contentReference[oaicite:0]
• :contentReference[oaicite:1]

And even ChatGPT kept trying to push me toward overengineered workflows:

• topology optimization
• geometry nodes
• advanced CAD pipelines

All I wanted was:

make the thing exist today.

Eventually I ignored all of that and tried the dumbest possible workflow:

generate SVG → import into Tinkercad

It worked immediately.

Step 1 — Generate Voronoi SVG

I used: https://voronoi-editor.web.app/

Huge credits to whoever built that tool because it completely removed the need for a complicated CAD workflow.

The main challenge was balancing:

• rigidity
• print speed
• aesthetics
• material usage

Too many holes and the card becomes fragile.

Too few and it loses the entire vibe.

Step 2 — Import into Tinkercad

I imported the SVG into: :contentReference[oaicite:2]

Then:

• extruded it
• used it to cut holes
• added a solid center circle for the NFC tag

The card base itself was just:

85mm x 55mm

That was basically the entire modeling workflow.

First Prototype: Failed

Two problems immediately showed up:

Too thick

I started with:

85mm x 55mm x 3mm

Way too thick.

It felt more like a weapon than a business card.

Holes too large

The Voronoi cells were too aggressive and the structure lost too much rigidity.

So I stopped the print early, adjusted the parameters, and tried again.

Second Attempt

Much better.

The final version:

• prints in 26 minutes
• wastes less material
• feels unique
• and naturally bridges physical + digital interaction through NFC

Current thickness:

2mm

But I already want to reduce it further:

1mm ~ 1.5mm

The entire process:

idea → prototype → physical object

took less than:

3 hours

The Business Card Is Almost Irrelevant

That is the crazy part.

The interesting thing here is not the business card itself.

It is the collapse between:

imagination and manufacturing.

A single person with:

• a laptop
• AI tools
• internet access
• and a cheap 3D printer

can now:

• imagine objects
• prototype them
• manufacture them
• iterate them

inside a single afternoon.

From a home office.

A while ago this would have required:

• specialized software
• fabrication shops
• industrial tooling
• expensive prototyping pipelines

Now it mostly requires:

• curiosity
• momentum
• and willingness to try dumb ideas quickly.

That changes much more than business cards.

It changes the speed at which ideas become real.