CODE BLUE 2019 · Japan · 2019

CODE BLUE 2019 Blinky Badge

Japanese Halloween soldering-village PCB badge

CODE BLUE 2019's first hardware soldering village used a simple Halloween-themed blinky PCB badge, built around a custom PCB, RGB and 1206 LEDs, CR2032 coin-cell holder, CR2032 battery, transparent unmasked PCB smile, and normal or reverse LED soldering options.

CODE BLUE Japan Tokyo Soldering Village Blinky Badge Halloween RGB LED 1206 LED CR2032 Beginner Hardware East Asia Asia

EventCODE BLUE 2019

SeriesCODE BLUE

LocationBELLESALLE Shibuya Garden, Tokyo

CountryJapan

People

Authors & Credits

badge project author and builder

Abhinav SP

Hackster project author for the CODE BLUE and AVTOKYO blinky-badge writeup.

Source

event and archive publisher

CODE BLUE

Official publisher of the CODE BLUE 2019 archive and event pages used for date, venue, and conference context.

Source

Why It Mattered

It adds another Japanese conference lineage and documents CODE BLUE's move into hands-on badge soldering culture, with a beginner-friendly artifact deliberately designed for fast workshop participation.

Hardware

The Hackster writeup covers two custom PCB badge designs across CODE BLUE and AVTOKYO, with 5mm RGB LEDs, 1206 SMD LEDs, CR2032 holders, CR2032 batteries, and soldering-iron assembly. For CODE BLUE 2019, the badge used a scary Halloween face, blue/black PCB color, transparent no-soldermask smile, visible tracks like veins, and LED choices for attendees.

Software & Apps

No programmable firmware, serial interface, or microcontroller behavior is documented for the CODE BLUE 2019 badge in the recovered sources. The verified behavior is a soldered blinky-light badge powered by a coin cell.

Lore

Abhinav SP says CODE BLUE 2019 was the first year CODE BLUE had a soldering village, so the badge was kept simple and made in under two days. The village ran out of most kits on day one, attendees chose LED colors and normal or reverse mounting, and many added silicon glue-gun diffusion.

Lifecycle

Add-ons & Upgrades

badge artwork source-backed

Halloween transparent-PCB blinky design

The CODE BLUE badge used a scary face with transparent unmasked PCB areas and visible tracks like veins, matching the blue/black conference color treatment.

Compatibility: CODE BLUE 2019 Blinky Badge

Source

workshop modification source-backed

Silicon glue diffusion option

The soldering village kept a silicon glue gun available to improve light diffusion, and the writeup says almost everyone opted to use it.

Compatibility: CODE BLUE 2019 Blinky Badge

Source

workshop technique source-backed

Reverse-mount LED soldering path

Attendees were encouraged to solder LEDs either normally or reverse-mounted; reverse mounting dispersed light better on both sides of the PCB.

Compatibility: CODE BLUE 2019 Blinky Badge

Source

Operational history

Issues & Camp Impact

firmware absence caveat note

The recovered sources describe a soldered blinky badge, LED mounting choices, and coin-cell power, but do not document a programmable MCU, firmware, serial shell, repository, or CTF behavior for the CODE BLUE 2019 badge.

The dossier keeps the artifact as a beginner soldering-village blinky badge instead of inventing software behavior.

Confidence: source-backed but intentionally narrow
Status: documented
Timeframe: 2019 badge archive pass
Source note: Hackster.io blinky-badge writeup.

missing rights-cleared image note

No local CODE BLUE 2019 badge photo has been added because the recovered Hackster article images and official event images have not been paired with explicit reuse rights, attribution, and processing notes for catalogue publication.

The Japanese CODE BLUE entry remains source-backed and image-free rather than copying project or event photos without a complete image provenance record.

Confidence: local project policy
Status: needs licensed original replacement
Timeframe: current catalogue build
Source note: badge.gallery image policy, CODE BLUE archive, and Hackster.io blinky-badge writeup.

Resources

Blinky Badges of Code Blue and AVTokyo badge writeup · Abhinav SP's project-owner writeup documenting CODE BLUE 2019's first soldering village, Halloween blinky badge design, component families, response, and workshop behavior. CODE BLUE 2019 access map venue page · Official access page identifying BELLESALLE Shibuya Garden in Tokyo as the CODE BLUE 2019 venue. CODE BLUE 2019 archive event page · Official archived event page for CODE BLUE 2019 dates, Tokyo framing, and international cybersecurity-conference context. CODE BLUE archives archive index · Current official CODE BLUE archive index corroborating Year 7 CODE BLUE 2019 and its October 29-30, 2019 dates.

Sources

CODE BLUE: CODE BLUE 2019 @TOKYO Retrieved 2026-05-15 · Primary event-context source for CODE BLUE 2019 dates, Tokyo conference framing, and international information-security scope. CODE BLUE: CODE BLUE 2019 Access Retrieved 2026-05-15 · Primary venue source for BELLESALLE Shibuya Garden, Shibuya-ku, Tokyo. Hackster.io / Abhinav SP: Blinky Badges of Code Blue and AVTokyo Retrieved 2026-05-15 · Primary project-owner source for CODE BLUE 2019's first soldering village, simple Halloween blinky badge, RGB and 1206 LED materials, CR2032 power, reverse LED mounting, and kit-demand lore.