Hi! I’m David. I also go by dave/davidk.

I work on the things that make up cloud infrastructure, mostly tailored to all things Linux.

This page is a collection of pointers to my side projects, time permitting: mostly consisting of software, electronics and 3D printables.

Software

GitHub has a bunch of things i’ve written over the years.

I have an interest in small embedded systems, so sometimes distributions and kernels that i’ve built end up there.

Electronics

For circuits and PCBs, OSHPark’s shared projects has a bunch of things i’ve gotten fabricated.

If toys interest you:

• Electroscope - A toy electroscope for visualizing charge, derived from a electrets video by vk2zay.

  Another explanation is available via @rrmutt, who had a set of boards made (and tried it out):

  • Electroscoping The Cat by @rrmutt

For slightly more practical things:

• The (now very out of date) stratum 1 NTP server has gotten attention over the years (and a lot of really great feedback, too):

  It’s very out of date now, but there are several places that have updated builds. If you’re interested, satsignal.eu has tons of up-to-date information in this area.

And the somewhat obscure, but occasionally useful:

• Avrrrinator v3, a programming adapter for the Bus Pirate v3 that lets you select between two attached AVR boards for programming

• Segger SWD/JTAG Breakout Board: A breakout board for the Segger J-Link to the smaller SWD 1.27mm pitch headers

3D Printables

I’ve also dedicated a significant amount of time to producing enclosures for electronics, and other practical items.

• Thingiverse and YouMagine have release-level designs.

Sources usually appear under the Collector3 org since they don’t need full documentation.

Some of the designs have writeups here:

• Buildlog: A soldering smoke absorber

• Cases for Feathers

• A modular Pi camera enclosure

Printables out there in the world

Here are a few that i’ve spotted, or have spotted features for (i’m always really happy to see these, feedback is rare):

• Adafruit: Adafruit Feather ESP8266 / ESP32 cases

• Hackaday: “Building the Perfect Home Router”: EspressoBin Case

• noopkat’s IoT Tiara (Huzzah Electronics Case): Adafruit’s ESP8266 Breakout Board (Huzzah)

• Featured, YouMagine: A modular Raspberry Pi Camera Enclosure

• Featured, YouMagine: Miniature Camera Enclosure

Contact

I’m on twitter as @keyglitch (for completed things) and similarly on @keyglitch@mastodon.social for in-progress work.

If you need help, please ask and i’ll do my best to help.