You might correctly point out that this design could be much simpler with the ball bearing lower in the knob, but there’s a trap here! The steel balls and casing of the bearing can become magnetized and interfere with the encoder. So that’s why I have this terribly complicated design to put the ball bearing high up in the knob. I’m glad to move away from this design! It did give me an excuse to buy a harbor freight arbor press though, so all was not lost 😃 #electronics
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12 results for “craigjb”
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Next I went on a crazy journey of 3D printing magnetic encoder knobs that were way too complicate and ended up feeling like cheap hot wheels toys. They are also complicated to print, requiring lots of tolerance tuning. Assembling the tiny 5mm ball bearings also can easily go wrong and produce a knob with unintentional detents. It was kind of fun learning to print mechanisms this small and assembly jigs for them. #electronics
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This is the culmination of a six month journey through many failed designs.
First I thought I could use nice Bournes encoders and embed them into the acrylic. That’s why the acrylic is 9mm thick and has cavities for encoder bodies. I followed the siren’s call of transparent PET flex PCBs from JLC. The transparent flex process is super cool, and I’ll probably use it for some other projects. However, when they say it’s optically transparent, well it has a ways to go. #electronics
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Underneath the LCD, a custom PCB with 20 MT6701 magnetic encoders detects the knob motion and turns it into USB MIDI CD messages #electronics
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The knob is basically a magnet glued to the end of a 6mm brass rod with a 3D printed PETG collar to keep the knob from pulling through. That goes through a sintered bronze bushing press into the acrylic (this acrylic has cavities leftover from my experiment with regular electronic encoders embedded in it). Then, knurled aluminum knobs go on top of the brass rod with a set screw. The real secret? Nye 795A medium viscosity damping grease on the brass rod. It gives a luxurious feel! #electronics
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The new knob design works so well. They feel better than the Bournes encoders next to them (leftovers from a failed approach). This also shows a bare bones UI on the LCD under the knobs. It’s a full 1920x550 LCD, no cut-outs for the knobs since they’re magnetic through the LCD. Unlimited possibilities 😎 #electronics
p.s. sorry for shaky cam
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I think I’ve made the best feeling magnetic encoder knobs yet! And the new design is basically “magnet on stick”.
A 6x1mm diametric magnet glued with a 3D printed collar to the end of a brass rod acts as the rotor. That fits into an oil imbued bronze bushing that press fits into the acrylic over the LCD screen. Then a standard knurled aluminum knob goes on top with a grub screw.
The secret to the great feel? Nyogel medium viscosity—wow does this stuff give the right high-end knob turning feel!
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The Dunning-Kruger effect in accessibility - Craig Abbott https://www.craigabbott.co.uk/blog/2026/the-dunning-kruger-effect-in-accessibility/
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https://www.lovenhl.com/1605562/ ‘Cole Perfetti has a brilliant hockey mind’: Button on Perfetti’s strong showing on top line #CentralDivision #ColePerfetti #CraigButton #EdmontonOilers #nhl #NHLAnalysis #SCWithJayOnrait #StuartSkinner #TSN #WesternConference #WinnipegJets
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https://www.lovenhl.com/1605328/ Is This The Beginning of the End For Jordan Binnington? #Berube #Blues #BluesPodcast #BluesReaction #BraydenSchenn #CentralDivision #CraigBerube #DougArmstrong #hockey #HockeyPodcast #JordanBinnington #nhl #RobertThomas #RyanO'Reilly #sports #StLouis #StLouisBlues #StLouisBluesAnalysis #StLouisBluesGameRecaps #StLouisBluesNews #StLouisBluesPodcast #StanleyCup #STL #STLBlues #ToreyKrug #VladimirTarasenko #WesternConference
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After a few days exploring and writing some #zig, I am intrigued and see myself using it more in the future. Unfortunately, the openbsd zig build is not able to do incremental compilation, and on my *very* small system, compilation of a simple program is taking about 10s. On my more modern linux box, it's near instant. This is a local constraint of my workstation project, and not a real deficiency in zig, IMO.
May be time for me to turn my silence nuc into a more powerful openbsd workstation..
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Dinner was bread made by my wife’s coworker, and two kinds of Jasper Hill cheese (Willoughby and BayleyHazen), along with our house Black currant jam, cabot butter and cheddar, pepperoni and some local honey.
Vermont food systems for the win.