Acrylic Light Puzzle Has A Point

[JBV Creative] recently became a proud owner of a laser cutter and, like most of us, started to think about what they could make with it. The answer was simple, a clever little piece of art or puzzle made of stacked acrylic.

He created some text and extruded it from a single point, but not every part intersected with every plate, giving each plate an indecipherable appearance. This allows a small light source (like the LED likely on the back of your phone) to cast a shadow on the wall. With some 3D printed brackets and spacers, it was mounted to a nice piece of cherry plywood. Overall, the technique is quite simple and easy to understand. [JBV Creative] didn’t include more detail on the process, which is a shame because it looks like a beautiful effect to recreate for some puzzles.

These glowing coasters are fantastic if you’re looking for engraved acrylic with a light source. Or this puzzle that lights up as the pieces are placed.

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A Cyberdeck Built With Ergonomics In Mind

With a new decade looming over us, the hot new thing for hackers and makers everywhere is to build cyberdecks to go with the flashy black-and-neon clothing that the sci-fi films of old predicted we’d all be wearing come next year. [Phil Hagelberg] has been designing one based on his own ergonomic keyboard, prioritizing not only form but also function.

The Atreus mechanical keyboard has a split layout that foregoes the traditional typewriter-inherited staggered arrangement in favor of one that better fits the user’s hands. The reduced number of keys limits hand movement for a more comfortable writing experience, however if you use function keys often, the trade-off is that you’ll need to use an auxiliary key to access them.

The deck [Phil] documents for us here is built from the ground up around that same design and aims to be small enough for travel, yet pleasant enough for serious use. It’s gone through four revisions so far, including an interesting one where the keyboard is laid out on the sides for using while standing up. As for the brains of the machine, the past revisions have used different flavors of Raspberry Pi and even a Samsung Galaxy S4 phone, though the latest model has a Pine64 running the show. How much has changed between each finished prototype really goes to show that you don’t have to get it right the first time, and it’s always good to experiment with a new idea to see what works.

[Phil] is now moving onto a fifth prototype, and hopes to eventually sell kits for building the whole cyberdeck along with the kits already available for the standalone keyboard. We’ve been struck by the creativity shown in these cyberdeck builds, which range from reusing retro computer shells to completely printing out a whole new one for a unique look. We can’t say for sure if this custom form-factor will eventually surpass mass-produced laptops, but it sure would be hella cool if it did.

Acrylic Stencils Help With Component Placement For SMD Assembly

Surface mount is where the action is in the world of DIY PCBs, and deservedly so. SMDs are so much smaller than through-hole components, and fewer holes to drill make surface-mount PCBs easier to manufacture. Reflow soldering is even a snap now thanks to DIY ovens and solder stencils you can get when you order your boards.

So what’s the point of adding another stencil to the surface-mount process? These component placement stencils are [James Bowman]’s solution for speeding up assembly of boards in production runs too small to justify a pick and place robot. [James] finds that placing small components like discrete resistors and caps easy, but struggles with the placement of the larger components, like QFN packaged microcontrollers. Getting such packages lined up exactly is hard when the leads are underneath, and he found repositioning led to smeared solder paste. His acrylic stencils, which are laser-cut from SVGs derived directly from the Eagle files with a script he provides, sandwich the prepped board and let him just drop the big packages into their holes. The acrylic pops off after placement, leaving the components stuck to the solder paste and ready for their trip to the Easy Bake.

[James] claims it really speeds up hand placement in his biggish runs, and it’s a whole lot cheaper than a dedicated robot. But as slick as we think this idea is, a DIY pick and place is still really sweet.