kbob

kbob, 12 days ago to woodworking

When you don't have a drill press...

#BlackLackStackHack #woodworking

kbob, 20 days ago to DSP

I want to write a digital delay. Does anyone know of good info on how to use all-pass filters in delay lines for phase weirdness effects? Or any filters, really.

I'm planning on using a Teensy 4.x (Cortex-M7), so I won't have a lot of compute power.

Thanks.

@synths #synths #dsp

kbob, 23 days ago to random

Adafruit sells ultraviolet Neopixel strips. Has anyone here seen any good projects using them?

How well can you tell which pixels are on when they're not visible light?

#Adafruit #Neopixel #LEDs #WS2812 #BlinkenLights #UV

kbob, 1 month ago to synths

I got a new keytar as a gift yesterday. It's a MIDI controller only. I want to play this thing in band, but don't know what to connect it to. What's your favorite softsynth for playing live? Name presets, if you use them. Mostly classic rock. I prefer poly -- I can't keep myself from playing chords, even in lead lines. MacOS or maybe iPad.

Thank you.

@synths #synth

kbob, 2 months ago to random

I'm happy to have gotten two geeky delights from fellow Mastodonians this week. Thanks @logicalelegance , @esden , and @whitequark !

Photograph of a Glasgow Digital Interface Explorer, its aluminum case, and its pinout card

kbob, 2 months ago to blink182

Where do you tooters buy your LED strips? I "need" a couple of meters of 144/m RGBW Neopixels. Adafruit? Amazon? Ali Express? A retailer that doesn't start with A?

Thanks.

Tagging the experts @geekmomprojects @jasoncoon

#LEDs #blink

kbob, 2 months ago to random

I do not understand components and coordinate systems in Fusion 360. Because of that, I may have lost the design I've been drawing all week.

I changed a parameter, and half the things that should have moved did move, and half did not. Curves that had been closed were no longer closed, and things got worse from there.

It looks like parameters used in the Move/Copy command don't update? Do I have to use a rigid joint to fix every component?

Advice welcome.

kbob, 3 months ago to random

I just accidentally learned that Firefox's DOM Inspector lets you drag HTML elements to different places in the tree. I was trying to copy an image's alt text (to translate it to English), and instead I dragged the image onto a different post.

kbob, 3 months ago to 3DPrinting

For the last week or so, my Prusa MK4 has not been able to print. Prints are not sticking to the build plate. I've tried:

• different filament, PLA and PETG
• cleaning plate with soap and water
• cleaning with 70% and 99% isopropyl
• different build plate
• cleaning hobbed gear with toothpick
• poking at nozzle with acupuncture needle

This morning I took the Nextruder apart and put it back together. Testing now.

@3dprinting #Prusa3D #3DPrinting

kbob, 4 months ago to woodworking

I had an epiphany today: Mastodon is my makerspace. I haven't been able to find a makerspace in this area since we moved here in '22, and that's been bugging me. But I scroll through Mastodon and see people's printing, woodworking, electronics, and welding projects, and I admire them, and sometimes I ask questions and learn new techniques. And when I post my own, people do the same.

That's a makerspace.

@3dprinting #MakerSpace #woodworking #fpga #electronics #DIY #3DPrinting #welding

kbob, 4 months ago to synths

Can anyone identify the flying saucer at the right in this photo? Is it a real thing?

The photo is part of Moog's ad for their new Animusic Galaxy, a VisionOS app. Which is very interesting, if a bit silly. https://www.moogmusic.com/news/introducing-animoog-galaxy

@synths #synths

kbob, 4 months ago to retrocomputing

@stefan posted a picture of patched paper tape yesterday. So here's a story.

Circa 1982 I was an undergraduate cleaning out a professor's lab. Put a bunch of old stuff into the dumpster, but I saved this box.

🧵 1/N

#RetroComputing #ComputerHistory

The same cardboard box, opened. Inside is a smaller cardboard box, two gray painted metal things, and a plastic box. The smaller box has #2018 written on it, then scribbled over.

kbob, 4 months ago to 3DPrinting

I'm thinking about printing a flip-down MagSafe iPhone charger to mount under the kitchen cupboard. This is kind of the idea. I'm still working out how to route the cord. I'm imagining magnets to hold it in position either flipped down or flipped up, but haven't modeled those either.

#3DDesign #3DPrinting #iPhone #MagSafe

kbob, 4 months ago to 3DPrinting

What’s a good polyurethane (TPU) filament that’s easy to print with? Softer is better, but softer is probably more challenging. I’m not particularly price conscious. Buying in/shipping to US.

Thanks.

@3dprinting #3DPrinting #FilamentReviews

kbob, 5 months ago to random

I'm thinking about undertaking a nontrivial project for 2024. I've been preoccupied with moving in 2022 and '23, but it's time to do something interesting.

Right now, the thing I'm thinking about is learning carbon fiber layup and making myself a custom keytar.

I'm also thinking about several projects I tried in years past and never completed satisfactorily.

I can't find a makerspace in the area, so it's going to be solo, in any case.

Thread 1/???

kbob, 5 months ago to 3DPrinting

Here's my new webcam stand. This was supposed to be a quickie, but it took me four tries to print it. The delay gave me time to redesign it and make it a little better looking.

I filled the bottom with holes, and I can add as many M5x10 machine screws as I want for ballast.

So yeah, I've finally got Octoprint set up. I've only had this printer 5 years...

@3dprinting #3DPrinting #3DPrinted #OctoPrint

Other view of the camera on the stand. The camera is pointing roughly toward the center of the printer's X axis.
Underside of the camera stand. The camera is screwed with a 1/4-20 pan head screws. The bottom of the stand has an array of five by seven counterbored holes. There are M5 hex head screws in three holes at each corner.
Octoprint screen capture showing the view from the camera. The printer is idle. The image is out of focus.

kbob, 5 months ago to random

Printed ABS like a champ. Textured build plate and all.

This is the V Block that someone posted here a few days ago. https://www.printables.com/model/646144-v-blocks-with-clamp

The filament is some old ABS I've had since 2014 or so.

#3DPrinted #ToolsForTools

kbob, 5 months ago to random

I have been going through an ordeal. Last Sunday, I came down with COVID for the first time. I had just arrived at my mom's house in Ohio. (She's not there. She's in a home now.) So instead of spending the week with her, I spent it sick alone in a house with no Internet, no TV, and no food. (Fortunately, there were heat and electricity.)

🧵 1/n

kbob, 7 months ago to random

Ten years ago today. November 8th, 2013.

1/2

#making

Screen capture from OpenSCAD. A red triangular frustrum shape is sitting on top of a red rectangular shape.
Screen capture from OpenSCAD. A gray square made of five pieces is in back. Three green bars are in front, arranged in a triangle. Three long yellow bars extend outward in front of each green bar. A red equilateral triangle sits in front of everything else.

kbob, 8 months ago to random

I wake up this morning to find a reply I wrote back in August got five likes yesterday. It got a couple when I wrote it, then nothing, then this.

The way old messages go dormant and then randomly wake up is weird. Gratifying but weird.

kbob, 8 months ago to glasgow

I am so excited!

#Glasgow #1BitSquared #CrowdSupply #WhatSupplyChainIssues

kbob, 9 months ago to random

This fine piece of decapitated burlwood is on its way to my house now. I may as well use the retailer's photo, as mine won't be nearly as well lit.

(see image text for details)

kbob, 9 months ago to 3dmodeling

I modeled a thing!

This is a case for a MIDI breakout box. I wonder if it will snap together. I wonder if the lettering is in bad taste. I wonder if Optima's fine serifs will emboss okay.

#3DModeling #MIDI

CAD rendering of a MIDI breakout box with the top half removed. Inside is a printed circuit board with a USB type A jack at the bottom, eight MIDI DIN jacks along the left side, eight more MIDI DIN jacks along the right side, and a Teensy at the top with its USB micro-B connector facing out.

kbob, 9 months ago to random

It amuses me and gratifies me when my functional designs come out looking weirdly beautiful. This is a two-piece joiner to attach an IKEA LACK table leg to the top of another LACK table.

The plan is that the male part will screw onto the table top, and the female part will screw onto the end of the leg, then they'll interlock. I'll need four of each. The curvilinear shape will be entirely hidden when it's assembled.

#3DPrinted #IKEA

Screen capture of PrusaSlicer slicing the thing and its mating part. The mating part has four screw holes where the thing's webbing isn't. Both halves are the same dimensions. When joined, they'll form a solid block, minus the screw holes.

kbob, 10 months ago to random

I am very tempted. I don't actually need a Linux laptop, but if I got one, this is what I'd get.

https://fosstodon.org/@frameworkcomputer/110735624720598160

#FrameWork #Shiny