OpenSpool
Open-source RFID tags for 3D printer filament. Tap a spool on the reader and the printer loads the right filament settings.
Salt Lake City, Utah
I build open hardware for 3D printing, homelab gear, and the infrastructure behind it.
I'm Spencer Owen, an automation engineer. I started out in config management with Puppet and Chef. These days I mostly build open-source hardware and firmware, like OpenSpool, which adds RFID filament detection to 3D printers.
Featured projects
OpenSpool Mobile
iOS and Android companion app for reading and writing OpenSpool NFC filament tags.
10-Inch Rack Generator
A parametric OpenSCAD model that generates 3D-printable 10-inch mini rack shelves for any device.
Shipping Container K8s
A Kubernetes cluster of small computers built into a 1:20 scale model shipping container.
3D printing & hardware
Slicer Selector
Opens .stl and .3mf files by asking which of your installed 3D-printing slicers to use.
PrintFarmButton
A physical LED status light and button for print farms. Press it to mark a plate as cleared and start the next print.
Klipper Ender 2 Pro
Klipper firmware configuration for a Creality Ender 2 Pro.
MuteMe Arduino
Open-source version of the MuteMe button: shows whether you're muted and toggles your mic. PCB files included.
F150 Remote Start
Extends the range of a truck's remote start with a spare key fob, a Wemos D1 Mini and Home Assistant.
Homelab & infrastructure
Omarchy Proton Drives
Mounts multiple Proton Drive accounts as real folders on Omarchy, using rclone and FUSE.
Tesmart KVM hacks
Controls Tesmart KVM switches over serial and by emulating the infrared remote.
Earlier work
puppet-gitlab
Puppet module that installed GitLab 7, back when GitLab had to be compiled from source.
csv2influxdb
Command-line tool that converts CSV files into InfluxDB points.
r10k GitLab webhook
Small Ruby server that runs r10k Puppet deploys when GitLab sends a push webhook.
All Spark Cube
Desktop software for animating an RGB LED cube.