jsVoronoiPCB

Javascript application to process a circuit board image and output G-code suitable for laser engraver or similar machine. To reduce tool time, the board traces are Voronoi Tesselated. https://en.wikipedia.org/wiki/Voronoi_diagram

The input image is expected to be black-and-white with an optional third color:

WHITE: Etch (Remove copper)

BLACK: Trace (Leave copper, voronoi tesselate)

OTHER: Hole/signal trace (leave copper, etch around given perimeter)

Procedure:

• Spray-paint a piece of copperclad PCB in flat black. (I used Krylon)
• Etch in laser engraver using output from this applet. (I used an Eleksmaker A3 Pro, 2.5W)
• Scrub with a soapy toothbrush to remove charred paint.
• Etch board as normal with Ferric Chloride or equivalent.
• Remove paint with acetone and swabs. (Selective removal of paint provides solder mask.)

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UI:

Input:

Output:

Etched, Tinned:

See Nurdrage's D.I.Y. tinning solution tutorial video here: https://hackaday.com/2017/10/23/tinning-solution-from-the-hardware-store/

I have a live demo here at the link below, and there are example input images in the examples/ folder of this repo.

http://pugbutt.com/jsVoronoiPCB/voronoi_pcb.html

One source of inspiration for this project is the Visolate project which has a similar aim but is written in Java:

https://groups.csail.mit.edu/drl/wiki/index.php?title=Visolate:_Voronoi_Toolpaths_for_PCB_Mechanical_Etch