Thomas Flummer
Project owner and publisher of the 35C3 badge project page and assembly guide.
Source35th Chaos Communication Congress · Germany · 2018
35C3 Labitat Indie Badge
Unofficial SR-latch PCB badge for Labitat
An unofficial Labitat indie badge for 35C3 using the congress artwork theme, a simple flip-flop memory circuit, reverse-mount LEDs, a two-AA battery holder, and an optional power-only Shitty Add-On footprint.
SeriesChaos Communication Congress
LocationLeipzig
CountryGermany
People
Authors & Credits
Bleeptrack
The project page links the 35C3 artwork theme and guidelines used as inspiration for the board design.
SourceLabitat
The project page describes the badge as an indie badge for Labitat.
SourceWhy It Mattered
It adds a missing European Congress hallway-badgelife example while preserving the important distinction Thomas Flummer made: 35C3 had no DEF CON-style official badge tradition, so this was an independent Labitat artifact.
Hardware
The project page and assembly guide document a PCB whose front artwork shows the circuit diagram while the back carries a functioning SR-latch-style flip-flop, two orange LEDs, ten green LEDs, ten blue LEDs, reverse-mounted LED techniques, two push buttons, BC817 NPN transistors, resistors, a power switch, two-AA battery holder, and optional power-only SAO connector.
Software & Apps
No firmware is claimed for the badge itself; it is a discrete electronic badge. The hack surface is assembly, continuity testing, LED behavior, power routing, PCB artwork, and add-on power rather than microcontroller code.
Lore
The badge followed the 35C3 Refreshing Memories theme by turning a one-bit memory circuit into wearable circuit art. The assembly instructions preserve real production lore: a ground-fill keepout mistake, rotary-tool rework on distributed boards, and fixed design files in the GitHub repository.
Lifecycle
Add-ons & Upgrades
badge expansion
optional
Power-only Shitty Add-On connector
The optional SAO connector follows the rough orientation of the standard for upright add-ons but leaves I2C pins unconnected, making it a power-only aesthetic expansion point.
Source
discrete electronics
source-backed
One-bit SR latch badge circuit
The badge turns the 35C3 Refreshing Memories theme into a simple flip-flop memory circuit with two orange LEDs and button-controlled state.
Source
visual hardware
source-backed
Reverse-mount artwork backlight
Ten green and ten blue LEDs illuminate the front-side circuit artwork through the PCB, while the assembly guide documents reversed LED mounting and soldering risks.
SourceOperational history
Issues & Camp Impact
missing rights-cleared image
note
No 35C3 Labitat badge image is published because the project page and assembly photos do not provide a complete reuse basis, attribution string, and processing record for this catalogue.
The entry remains source-backed and image-free rather than copying all-rights-reserved project photography.
- Confidence
- local project policy
- Status
- needs licensed original replacement
- Timeframe
- current catalogue build
- Source note
- badge.gallery image policy and Thomas Flummer 35C3 badge pages.
production rework caveat
note
The assembly instructions document a PCB design error where missing LED keepout areas required rotary-tool copper removal on boards, while the GitHub design files had the error fixed.
The record preserves production reality and warns future builders that surviving boards may differ from repository files.
- Confidence
- primary assembly guide
- Status
- historical
- Timeframe
- pre-assembly
- Source note
- Thomas Flummer 35C3 badge assembly instructions.
unofficial badge classification
note
The project page says there was not an official DEF CON-style electronic badge tradition at Congress and frames this as an indie badge made for Labitat.
The catalogue treats the badge as Congress hallway badgelife, not as an official CCC admission badge.
- Confidence
- primary project page
- Status
- documented
- Timeframe
- 35C3
- Source note
- Thomas Flummer 35C3 badge project page.
Resources
35C3 badge assembly instructions
assembly guide · Detailed assembly guide source for components, two-AA battery holder, reverse-mounted buttons and LEDs, power-only SAO footprint, and board-rework caveat.
35C3 badge for Labitat
project page · Project-owner source for unofficial classification, Labitat context, SR-latch memory theme, reverse-mount LEDs, board artwork, and GitHub design-file link.
35C3 wiki
official event wiki · Official archived 35C3 wiki source for event context, Leipzig setting, and annual four-day CCC congress framing.
flummer/35c3-badge
design files · Public GitHub design-file repository linked from the project page for the 35C3 Labitat badge.
Sources
Chaos Communication Congress: 35C3 Wiki
Retrieved 2026-05-15 · Official event source for 35C3 as the 2018 annual four-day CCC congress in Leipzig.
GitHub: flummer/35c3-badge
Retrieved 2026-05-15 · Public design-file repository linked from the primary project page.
Thomas Flummer: 35c3 badge for Labitat
Retrieved 2026-05-15 · Primary project-owner source for the unofficial Labitat badge, no-official-DEF-CON-style-badge statement, SR-latch theme, reverse-mount LED construction, and GitHub design-file pointer.
Thomas Flummer: 35c3 badge assembly instructions
Retrieved 2026-05-15 · Primary assembly source for component placement, modified push buttons, BC817 transistors, LED/resistor counts, two-AA power, SAO connector behavior, and rework details.