The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

Tag: Improvements

Making the world a better place, one piece at a time

Wheelbarrow Drain Holes

Attacking a plastic wheelbarrow with a ¾ inch hole saw prevents it from becoming a mosquito breeding station:

Wheelbarrow drain holes

We had been storing it tipped to one side, resulting in the wheel filling up with water, which can’t be a Good Thing.

If it must carry a load of sand, I’ll just duct-tape the holes.

One of Mary’s friend looked at, but did not order, this wheelbarrow on Amazon. Shortly thereafter, she received a wheelbarrow in two packages: the handles and a box with everything else strapped into the barrow. After a discussion with Amazon’s support / help staff, she was told to just keep it at no charge.

Over the next few weeks, she received five more wheelbarrows, each prompting a discussion and keeping them at no charge. Eventually, somebody figured out how to stop the stream.

So half a dozen gardeners now have free wheelbarrows, courtesy of a glitch in The Machine.

Makes you wonder, doesn’t it?

2024-08-08
Anker A1215 PowerCore 13000 Power Banks: Five Years

After five years of powering the action cameras on our Tour Easy recumbents, the pair of Anker A1215 PowerCore 13000 USB power banks have about 8 A·hr of capacity with a 2 A load after a full charge:

Anker PowerCore 13000 – 20204-07-26

It seems I did not test them on arrival, so I have no idea what their original capacity might have been, but I’m certain it wasn’t the 13 A·hr implied by their name.

The sawtooth voltage output looks like the internal controller picks a constant boost (or buck) ratio based on the battery voltage, then adjusts it when the output voltage falls below the lower limit. You can imagine it desperately boosting the ratio as the battery voltage falls off a cliff near the end of the curve.

I have no idea why the two packs behave so differently, although the voltages are certainly within ordinary USB limits.

They’ll continue powering the camera on my bike for a while, after which I’m sure they’ll come in handy for something …

2024-08-06
Tour Easy: Anker 20K V2 USB Power Bank

After five years, it’s time to replace the Anker 13000 mA·hr USB power banks / chargers I used with the M20 cameras and then the C100 cameras:

SJCAM M20 Mount – Tour Easy side view

The Anker 325 20K V2 power bank is considerably chunkier, as befits its 20,000 mA·hr cell capacity (although the fine print says 12,500 mA·hr output):

Anker 20K V2 Power Bank – installed

The white tape stripe on the top marks the USB port on the end to reduce the fumbling involved in an out-of-sight socket. There’s also a USB-C port on that end for both charging the pack and powering other devices.

The new mounting cradle descends directly from the 13000 cradle:

Anker 325 20KV2 Power Bank – slicer preview

The model includes a projection of the battery on the XY plane for export to an SVG file suitable for laser-cutting an EVA foam pad to cushion the bumps.

The OpenSCAD source code as a GitHub Gist:

2024-08-05
Rail Trail Brush Clearing

Having an aversion to getting slapped in the face by Blackthorn branches overhanging the Dutchess Rail Trail, I generally give up waiting for anybody else to do the job:

Brush clearing B – 2024-07-14

They’re not all Blackthorn (Prunus spinosa), but Ailanthus altissima grows like a weed around here and requires heavy cutback:

Brush clearing C – 2024-07-14

It’s not just small branches:

Brush clearing A – 2024-07-14

Apparently, there was no law against that …

Brush clearing E – 2024-07-14

A recent storm dropped many trees across the trail and the maintenance folks deploy bigger saws than I can carry:

Brush clearing D – 2024-07-14

Three months after we were told they had ordered replacement tiles, I’m beginning to think I must buy some on Amazon and do this job myself, too:

Overocker ADA – continued disintegration – 2024-07-21

Maybe it’ll get done when the weather cools …

2024-07-30
Laser Test Paper Beam Alignment Targets

Having failed at making flexible plant tags, I figured using laser test paper to make laser test targets might work:

Test paper – target patterns – 2024-07-03

They descend from my original dot-mode laser beam targets:

OMTech 60W laser – beam alignment – 2022-03-22

The dots just barely punch through the back side (open in a new tab & zoom for more dots):

Test paper – target patterns back side- 2024-07-03

The plastic coating chars and buckles with each pulse, but remains in place:

Test paper – 2 shot – uncleaned – 2024-07-03

Wiping the surface removes the loose coating / ash / debris to expose the underlying charred paper core:

Test paper – 2 shot – wiped – 2024-07-03

Those are two pulses marking the ends of each axis, so the machine remains well aligned after the fourth-quarter tweak.

A single pulse shows the beam has a nice round shape with well-defined edges:

Test paper – 1 shot – wiped – 2024-07-03

In principle, the beam should be more intense toward the middle, but I suspect that’s beyond the paper’s ability to resolve the energy; the beam either burns through the coating or it doesn’t. In all those targets, the back surface of the paper remains undamaged.

Manila paper targets seem to have better energy resolution and take much less time to produce:

Beam Alignment – Mirror 2 detail – 2023-09-16

The black test paper will certainly come in handy for something, though.

2024-07-17
Door Knob Lock Orientation

For the usual historic reasons, the exterior doors on our house all have different knobs with different lock orientations (and keys), so it’s difficult (for me, anyway) to verify they’re locked with just a glance. The correct solution of replacing all the knobs seems like a great deal of effort & expense for very little benefit.

This is easier, albeit considerably less stylish:

Doorknob 1

When the twisty thing aligns with the label, it’s locked:

Doorknob 3

No matter what orientation it has:

Doorknob 2

The scars in the paint show some of those doors have sported many knobs over the last half century or so.

You’d think such a thing could be standardized, but nope.

If we lived in a fancier house, I probably couldn’t get away with it.

2024-07-11
Clothes Washer Hose Bumpers

For obvious reasons, the water hoses tend to thump against the wall and the sheet-metal back of the clothes washer, so I added foam disks to mute the noise:

Clothes washer hose bumpers

They’re closed-cell polyethylene foam, laser-cut from a sheet about 15 mm thick. The cut is a yawning 2 mm wide near the top, but it pretty much doesn’t matter in this application.

The black line in the split is a snippet of the usual outdoor-rated foam tape, which probably won’t stick well to PE foam. If these fall apart, a cable tie around their waist should suffice.

The nice clip in the foreground is one of two intended to corral the drain hose. It’d be nice if LG included a few clips for the water hoses, but no matter where they were, the hoses would want to go elsewhere.

2024-07-10