QZ qz thoughts
a blog from Eli the Bearded
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Abacus


I saw this antique wearable abacus recently and thought "How small an abacus can I make?" Answer is "Not quite that small, but pretty tiny."

Abacus ring

Chinese abacus ring, about 12mm x 7mm (0.5" x 0.36"), that inspired me.

Wood frame on blue tape as glue dries

I cut some thin slivers of wood, drilled tiny (#66 drill bit, .033", .838mm) holes, and then glued into a frame shape. To hold it while the glue dried, I stuck it to blue painters tape. My smallest seed beads are 1.5mm, so I drilled holes 2mm apart. Final size will be about twice as wide as the ring.

Starting to bead

I stained the wood and glued a brass angle iron on for reinforcement. I'm using colored jewelry wire.

Custom bead tweezers

I'm using a bead tweezers I cut from a coffee stirrer (see first picture, next to blue tape). It flexes to grasp beads pushed in, then the wire catches them to remove. Grid on ruler is in tenths of an inch.

Finished, next to a Lego plate

Smaller than a 4x2 Lego plate. Functional abacus with ten rods of seven beads each, brass reinforced wood frame.

Mini-Drawers


My desk at $WORK is small, with a large monitor taking up a lot of the space. And it is a motorized sit/stand desk with no real options for drawers or shelves. But I want to keep some small amounts of desk things in drawers. So I designed a small set to fit the space.

Short enough to fit under the monitor, with something on top of it, legs tall enough to have computer cables run underneath it, big enough to hold a note pad and paper clips, made of thin wood to not take up more space than necessary.

I made the drawers out of wood I had on hand. The drawers are a little crude. I mitered the edges of four sides and the bottom and glued them together with some square profile pieces reinforcing all of the joins. In retrospect I should have used triangle profile and neater joins for the reinforcing bits. I glued some button plugs on for pulls.

Those completed, I purchased some 3mm thick plywood for the case. Then Covid-19 hit.

My monitor is still on my desk at work, but I'm never in the office anymore. My home desk has ample shelves around it, and room to attach a drawer to the underside, if I wanted.

So the project went on hold.

But recently I returned to it.

chiseling a dado

For the sides, I measured, scored with a box cutter, then chiseled out dados for each of the horizontal pieces (top, middle, bottom). The chisel is a tungsten carbide one I made myself following how-to-guides by Patrick Sullivan on youtube.

loose fit together

I started with the bottom shelf, then loose fit the pieces together, put a drawer on it and measured for the middle, then did it again for the top. Here's the project at that stage.

clamped for glue

For the glue-up, I clamped a piece of scrap to my work table, then clamped the box between more scrap to that piece. Towards the end of the project I decided it would look good to have cork sides, for a micro pin board. I glued those on similarly.

completed

Here it is completed, on my home desk. At home, I run the cables out of the left side of the computer, at $WORK, the right. Just what's better for the power location. It fits a post-it pad and some dice on top. The smallest pins I could find are map tacks, but they are still a bit long for the shallow cork. I waxed the bottoms and sides of the drawers for smoother operation. Otherwise, the wood is unfinished.