Gemma projects revisited

2025-Mar-26, Wednesday 12:00 pm
It can be funny, what projects end up being used for a very long time. But with time comes maintenance, and possibly even improvements. Which is what happened as I was considering ways to make my beloved Gemma projects less fragile. When they were constructed I didn't have a 3d-printer, which ruled out experimentation. But I do now.

Gemma case )

Tiara )

But if we're talking about improvements around things involving Gemmas, then I'd like to present a lifetime achievement award to the maker of this JST connector extractor model. It's explicitly for micro:bits, but it's the same JST-PH form factor as used by Gemmas, Floras, and Lilypads. It is the 20 minute print that I wished I've had for the last 15 years. *applause*


Photo of two tiny bright green 3d prints, with two triangular 'hooks' at one end, and a raised area and hole at the other end for gripping.

JST-PH extractor tool
Photo by [personal profile] chebe

NeoPixel Tiara

2015-Aug-25, Tuesday 08:08 pm
I love the Adafruit Learn site, particularly the wearables section, there are some really fun ideas in there. And when I saw the NeoPixel Tiara I knew I needed one. I had almost everything already, except the 3d-printed band.

To TOG! We downloaded the thingiverse file (tiaraHolesClose.stl), converted to gcode, and watched the LulzBot Taz print for 50 minutes. *cue montage music* It was a pretty good print, given how fine some of the detailing is, but our process needs tuning as there are artifacts, and the strands are coming apart as I touch them. Still, usable!

LulzBot Taz 3D Printer part way through printing the tiara

Robot minion making me a crown. Finally.
Photo by chebe



On to the assembly! Process details await )

Tiara on top of my head, looking nicely symmetrical, with centre NeoPixel lit up

Finally, my royal position secured
Photo by chebe



And, because the tutorial code has a nice sparkle effect to it, here's a short video.



I am going to wear this everywhere.

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