Kernelcon 2019 K Badge
Kernelcon's 2019 K-shaped badge was an electronic badge controlled by an ATtiny85, powered by three CR2032 cells, and fitted with five APA102 addressable RGB LEDs plus a button-driven mode system and CTF clues.
Kernelcon
Kernelcon 2019
The April 5-6, 2019 inaugural Kernelcon in Omaha, where public badge sources document a limited electronic K-shaped badge with ATtiny85, APA102 LEDs, and CTF behavior.
Embassy Suites by Hilton Omaha Downtown Old Market, Omaha, Nebraska · United States · 2019
Lifecycle
Add-ons & Upgrades
Kernelcon 2019 K Badge
historical
Binary blink and Docker CTF
The 2019 badge challenges used blinked binary, silkscreen encoding, badge-role variants, SSRF, and a Docker-hosted challenge app.
Kernelcon 2019 K Badge
source-backed
APA102 mode stack
The badge exposed fading, freeze, binary blink, rave, and looping-animation modes through the badge button.
Operational history
Issues & Camp Impact
No Kernelcon 2019 badge image is published because the recovered repository images have not been paired with a complete reusable image license, attribution, and processing record.
The entry remains source-backed and image-free rather than copying repository screenshots or photos without complete catalogue provenance.
The public repository documents hardware and challenge behavior, but this pass did not recover a top-level license suitable for local image or code reuse assumptions.
The catalogue cites the repository as evidence while leaving images empty and avoiding license claims beyond the source text.
Resources
Kernelcon 2019 event notice
event context · University of Nebraska-Lincoln announcement source for April 5-6, 2019 dates, Embassy Suites Omaha Downtown Old Market venue, and limited electronic badge availability.
Kernelcon 2019 badge repository
hardware and challenge archive · Public ZonkSec repository preserving the ATtiny85, CR2032, APA102, LED-mode, and Docker CTF challenge details.
Kernelcon 2019/2020 retrospective
project-owner writeup · ZonkSec retrospective corroborating the 2019 K badge hardware, power switch, momentary button, CTF blink behavior, and project team context.
Sources
ZonkSec: Kernelcon Electronic Badges and Pogopin Hackery
Retrieved 2026-05-15 · Project-owner retrospective corroborating 2019 badge concept, programming role, power switch, mode button, and CTF blink challenges.
ZonkSec GitHub repository: kernelcon-2019-badge README
Retrieved 2026-05-15 · Primary source for ATtiny85, CR2032 battery slots, five APA102 LEDs, LED modes, binary blink behavior, secret mode, badge-role variants, and Docker CTF challenge flow.