swirly grid for mounting prototype boards

with most of our dev boards, sensors and feathers now sporting plug-and-play stemma QT ports (https://learn.adafruit.com/search?q=stemma%2520qt) it can be very fast to put together projects with half a dozen boards snapped together. But now you don't have a breadboard as a mechanical substrate... which is why jepler and scott collaborated on this nifty swirly grid design. originally 3D printed, we decided to upgrade these to an 'aluminum PCB' - note there's no actual copper on here, its just the aluminum backing, and then black soldermask with silkscreen. each square is 0.6 inch x 0.6 inch and there's holes every 0.2 inches. with the various dots and dashes you can pretty much make anything on a 0.1" grid fit. here's our demo to test it out. the aluminum is easy to cut/drill/machine/bend if you need more customization. coming soon to the adafruit shop!
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