Tag dossier
Badge records tagged with LED, across Australia, Brazil, China, India, Japan, Mexico, Puerto Rico, Singapore, Taiwan, United States.
First official DEF CON electronic badge
A Joe Grand-designed skull-shaped PCB badge for DEF CON 14, built around active electronics, open hackable circuitry, two blue LEDs, one button, seven soldermask role variants, and an official badge-hacking contest.
HeatSync Labs solderable PCB badge
The CactusCon 2014 PCB badge is preserved through Eric / Robot Ambassador's first-hand writeup, which describes 300 event badges designed by Erik Wilson, given away at the HeatSync Labs booth, and assembled by attendees with LEDs, resistors, batteries, and acrylic hardware.
Propeller 1 infrared puzzle and contest badge
A Parallax-built official DEF CON badge for DEF CON 22, based on the Propeller 1, infrared transmit/receive hardware, touch-pad buttons, LEDs, full USB programming, exposed I/O, and thirteen attendee-role styles.
Indian hardware-hacking conference badge
A conservative Nullcon Goa 2014 hardware-badge record tied to the official Nullcon Hardware Badge 101 (Desi Jugaad) talk, which covered electronics, microcontrollers, LEDs, the design of the 2014 hardware badge, what could be done with it, and production problems.
Japanese ATmega328P LED attendee badge
AVTOKYO's official 2015 badge page says the conference made an electrical badge for attendees, with an AT-MEGA328P-PU, eight 5mm LEDs, two push buttons, 16 MHz crystal, resistors, capacitors, IC socket, coin-cell holder and battery, public KiCad PCB design, and public Arduino program.
ESP8266 Badger hacking board
The BSidesPDX 2015 Badger badge is a conservative source-backed badge-hacking board record tied to the official Electronic Taxidermy: Badger Hacking workshop and the public PDX Badgers 2015 PCB and firmware repositories.
ATTiny85 capacitive LED PCB badge
The BSidesPDX 2016 badge is a source-backed Portland Security BSides PCB badge record tied to Calagator's event listing, official BSidesPDX 2016 schedule and speaker pages, and the public PDX Badgers ATTiny85 Eagle board, schematic, BOM, and Arduino firmware archive.
555-timer light-reactive soldering badge kit
CarolinaCon 12 included an easy-to-assemble electronic kit badge in the price of admission, with a 555 timer, LED, photoresistor, resistors, capacitor, AAA battery holder, wire, protoboard space, and Hardware Hacking Village support.
Electronic skull badge with Konami and serial puzzle paths
A Ryan Clarke / 1o57 DEF CON 24 electronic skull badge with a mini processor, buttons, LED eyes, printed codes, hidden-trace/silkscreen text, serial strings, lanyard data, conference-media files, and a badge challenge that used the Konami Code as an early visible hook.
STM32F030 IR Hardware Hacking Village badge
Ruxcon 2016's Hardware Hacking Village badge is preserved as an Australian STM32F030K6T6 badge with IR receiver/emitter hardware, eight LEDs, dual CR2032 holders, assembly documentation, and a public firmware archive.
ATTiny861 LED and SAO badge archive
The BSidesPDX 2018 badge is a source-backed Portland Security BSides badge archive tied to the official BSidesPDX 101 badge panel and the public PDX Badgers KiCad, BOM, LED mapping, and ATTiny861 firmware archive.
MSP430 electronic jar-of-fireflies camp badge
ToorCamp 2018's badge is preserved as a Great Scott Gadgets and OSH Park sponsored electronic jar of fireflies: a soldering-station badge kit built around an MSP430G2211, six green through-hole LEDs, CR2032 power, and open design/firmware files.
ATtiny13A solder-and-program participant badge
BSides Puerto Rico 2019's badge is preserved as a DIY participant kit: an easy-through-hole electronic badge built around an ATtiny13A, two red/blue LEDs, two 680 ohm resistors, a slide switch, CR2032 power, public Gerbers, KiCad files, Arduino sample code, and real assembled-badge photos.
ATtiny85 LED badge archive
The BSidesPDX 2019 Multnomah badge is a source-backed Portland Security BSides badge archive tied to the official schedule's badges-and-contests context and the public PDX Badgers KiCad, BOM, and firmware repository.
Flexible-PCB tree-game badge
A Grand Idea Studio badge for the first official international DEFCON edition, built as an artistic flexible-substrate PCB with 32 LEDs, USB connectivity, accelerometer input, role-color artwork variants, and a task-completion tree-lighting game.
Taiwan-shaped ARM TrustZone challenge badge
An official HITCON CMT electronic board badge shaped around Taiwan, combining collectable conference identity, 24 LED unlock states, sponsor booth challenges, a snake warm-up, and ARM TrustZone exploitation stages.
DePaul IRL ESP32 badge with capacitive pads, LEDs, speaker, and microphone
The THOTCON 0xA / Infinity badge was a Chicago electronic conference badge produced with DePaul's Idea Realization Lab for the May 3-4, 2019 event. DePaul Newsline reported a six-month, 1,700-unit custom circuit-board badge build; the public Poplicola repository documents a SparkFun ESP32 Thing Dev base, five capacitive touch pads, six LEDs, speaker output, microphone input, stock-firmware restore commands, and Arduino examples.
RP2040 audio, microphone, LEDs, and EdgeImpulse badge
BugCON 2022's Electronic Cats badge repository documents an RP2040 electronic badge for BugCON 2022 CDMX with USB serial access, LEDs, microphone, buzzer or speaker, a small machine-learning trail through EdgeImpulse, Arduino Mbed programming notes, KiCad hardware files, and Blink/AudioWAV firmware examples.
Simple LED and SAO-header soldering badge
A CrikeyCon 8 conference badge with a documented simple LED circuit, soldering workflow, three blue 1206 LEDs, current-limiting resistors, optional coin-cell holder, and 2x3 Simple Add-On header power path.
Wooden-PCB NE555 wrapped-wire badge
A deliberately old-school H2HC 2022 badge built as a wooden PCB with large components, wrapped wire, an NE555 clock signal, and blinking LEDs.
OlyMEGA light-sensing LED spider badge
ToorCamp 2022's badge is documented by an official badge-talk session and assembly PDF as an OlyMEGA-built soldering badge: four LEDs forming spider eyes, a photocell, potentiometer, MOSFET, slide switch, resistors, and a battery holder whose circuit lights the eyes in darkness.
Classic spy badge with speaker variant
Recon Village's DEF CON 31 badge entry, The Spy Silhouette, returned to the fedora silhouette with die-cut shape, LED illumination, a speaker-badge variant, and custom Recon Village lanyard.
DEF CON 31 youth-challenge ATtiny1614 LED badge
The Flux Decoder was a Social Engineering Community Youth Challenge badge for DEF CON 31, preserved through a public repository with KiCad board files, schematic material, and Arduino-style firmware for an ATtiny1614-powered flux-capacitor LED badge.
Middle-earth themed 555-timer LED soldering badge
BSides Canberra 2024's public ticketing page promised an electronic badge, and an attendee writeup describes the shipped badge as an orc-shaped soldering badge built around a 555 timer, LEDs, diode, resistor, capacitor, and 9V battery power.
ATTiny4313 POV fidget-spinner badge
The LayerOne 2024 POV Spinner Badge was an electronic fidget-spinner conference badge that displayed words and patterns through a 12-LED persistence-of-vision strip while spinning.
ESP32 touch-wheel badge with TFT, audio, LEDs, and games
The THOTCON 0xD badge was a Fourfold-built electronic conference badge for the May 30-31, 2025 Chicago event, documented as a 2,000-unit ESP32 touch-wheel badge with ST7789 TFT display, buzzer, six LEDs, LiPo power, add-on header, games, visual effects, and challenge hooks.
Singapore custom PCB hackathon badge
NUS Hackers' Hack&Roll 2026 introduced the event's first custom PCB badge, documented by the organizer recap, a Friday Hacks making-of talk, and a public MIT-licensed ESP-IDF firmware and component archive.