At his local hackerspace [Vincent Sanders] noticed an interesting problem. The stools that they had were great in most cases, but there was one workbench which was very much the wrong height for them. So began his quest to design and fabricate plywood stools which use no glue for their joints.
The Cambridge Makespace (in the UK) turns out to be a perfect environment for this type of project. They already had a CNC router which can cut the plywood pieces, and there are other members who were willing to help train [Vincent] on the equipment. He found a design on Thingiverse which fit the bill, except for the actual measurements. He needed metric units to match the sheet stock available to him. Once converted he put together a stool that didn’t work at all. The thickness of the plywood just didn’t mesh with the tolerances of the joints. After wandering around to different suppliers in town, digital calipers in hand, he came up with a range of actual thicknesses and adjusted his joint design accordingly.
Of course this wasn’t the last revision. Even with the joints working the seat was still a little rickety. He moved to the next plywood thickness offered, redesigning the files to match. His final stool works like a charm, with five or six of them fitting on one standard sheet of plywood.
Instead of giving it up for dead, [Suprise Pink Mist] fabricated a replacement case for the motor and blade of his broken coffee grinder. The original enclosure was made of plastic, which didn’t survive being dropped. There isn’t an image of what those plastic parts looked like, but we have to think they were nowhere near as neat as the replacement.
The first step was to cut a set of plywood discs to the approximate outside dimensions. Since the base of the motor has several different diameters each disc had a void cut out of its center to match. The image to the right shows the motor sitting upside down next to the stacked plywood. The black electrical tape seals around the mason jar ring which was a perfect friction fit with the original bowl of the grinder. Once everything was glued together the outside edges were flattened on a belt sander and the mason jar was screwed in place to house the beans during grinding.
To make the most out of his home theater sound system [Baccula] built this folded horn enclosure for as much bass sound as possible. The design was conceived by [Bill Fitzmaurice] who thought there needed to be a better way to use the subwoofers which are typically used in home systems. His design is called the Tuba HT and it is aimed at a 15″ speaker. [Bill] charges for the building plans, but we don’t mind living vicariously through [Baccula’s] construction album.
As you can see, there are a lot of wood parts that went into the cabinet. It starts with a base of 2×4 framing. From there the plywood sawdust really starts to fly as each component is produced. During assembly [Baccula] is careful to fully glue each joint — you don’t want to find out that your sub cabinet vibrates after you get everything installed. All together the new piece of living room furniture stands three feet tall and deep and two feet wide.
The album has no captions but you can read a bit more about the project in the Reddit comments.
[Toby Cole] likes to mix tunes whenever he gets a chance. But the size of his DJ equipment made it a real bother to lug around with him. He does own a Behringer portable mixer but without cross faders it’s not really all that usable, and most of the other offerings don’t get good reviews. He ended up replacing the enclosure of a proper mixer in order to make it light and small. The growing availability of affordable laser-cut parts made this project possible.
Build Brighton, [Toby’s] local Hackerspace, has a laser cutter. So he knew that if he could figure out a smaller case design it would be a snap to get his parts made. He cracked open the heavy metal case on the KMX 100 mixer and found it had a ton of extra room inside. He designed all of the plates using a digital calipers to properly space the holes and text labels. These designs were combined with BoxMaker to produce the files the laser cutter needed. The first prototype was cut from cardboard, with the finished product cut from 3mm plywood.
If you want to pretty up your project boxes, we can’t imagine anything better than [Shaun]’s walnut plywood, laser-cut, kerf bent Arduino case. Instead of the slot-and-tab construction of traditional laser-cut enclosures, [Shaun] used a technique to bend plywood without steaming, heating, and eventually scorching his somewhat expensive plywood.
This isn’t the first time we’ve seen this accordian style laser-cut kerf bend. By alternating laser cuts along the desired radius, the plywood can be bent by hand. The technique is called kerf bending and is perfect for putting an organic touch on the usual 90° angle project boxes we see.
[Shaun] has an Instructable for the smaller boxes that are part of his Arduino powered wireless sensor network. This Instructable goes over the pattern of laser cuts required to get a nice, smooth kerf bend, and also shows off how beautiful a laser-cut project box can be when cut out of aromatic cedar.
Here’s a laser cutting technique that makes thin plywood bendable. By cutting away elongated diamond shapes from the material, a lattice of strips connected minimally by alternating tabs is left over. The wood is then bendable, and it must be somewhat durable since the idea came from a product that uses the technique as a hinged notebook enclosure.
We don’t have much interest in it as an often used pivot point as surely it must be a problem with long-term use. But we love the look of it as a rounded corner on an enclosure like the Arduino project box seen above. The side walls are one continuous piece, with identical top and bottom sections which receive the alignment tabs. The whole thing is held together with just four bolt/washer/nut combinations.
But if you don’t have access to a laser cutter, we guess you’ll have to stick to altering pre-made enclosures for now.
For his wedding [Dave] wanted to have a photo booth but the $1k rental price was really getting him down. Instead, he decided to build his own. This cost less money and he gets to keep the booth once the festivities have concluded. He started by designing the assembly in Sketchup, taking into consideration the portability requirements that allow this to fit through doorways. What he came up with is a unit made from one sheet of plywood that folds up via piano hinges and takes about eight minutes to set up (video after the break). But where the design really shines is the all-in-one electronics module seen modeled on the right. It houses the monitor and the computer in one compact and rugged package.
If you like this you should also check out the suitcase photo booth and one other wedding-prompted build.
Continue reading “Foldaway photo booth”