Tag dossier
Badge records tagged with LED Matrix, across Belgium, Croatia, Denmark, Portugal, Serbia, Sweden, United States.
95-LED scrolling-text badge with capacitive controls
A Joe Grand / Grand Idea Studio electronic badge for DEF CON 15, built around a Freescale MC9S08QG8, a 5-by-19 matrix of 95 LEDs, capacitive touch controls, customizable vertically scrolling text, persistence-of-vision behavior, and another official badge-hacking contest.
PIC badge with LED matrix, IR, and open firmware
A slim open-hardware conference badge designed around a red 8x16 LED matrix, PIC18LF25K50, IR send/receive, USB bootloader, tactile controls, and attendee-written demos.
PIC18 LED-matrix badge with IR and accelerometer
The 2016 Hackaday Superconference badge, also documented as the Supercon II badge, was a Voja Antonic-designed open hardware badge with a red 8x16 LED matrix, PIC18LF25K50/PIC18F25K50-class MCU, integral LIS3 accelerometer, infrared communication, USB bootloader, five tactile controls, and expansion pads.
ESP32 fox badge with jewels and robot paths
A fox-shaped ESP32 badge with 5x7 LED eye matrices, touch pads, buzzer, 18650 power, Lego Technic mounting holes, and jewel add-ons.
ESP32 MicroPython badge with 8x32 LED matrix and twelve minibadge spots
The SAINTCON 2018 ESP32 Badge was an electronic conference badge built around a LOLIN D32 / ESP32 module running MicroPython, an 8x32 LED matrix, three buttons, a rechargeable battery, Wi-Fi configuration behavior, Hacker Challenge score display, and twelve minibadge spots.
ESP32 39x9 LED-matrix badge for Pixels Camp
A Portugal source-backed ESP32 PCB badge for Pixels Camp 2019 with a 39x9 RGB LED matrix, IS31FL3741 LED driver, CH340G USB serial, USB/LiPo power, and public schematic/PCB design files.
CircuitPython LED-matrix IR badge
A SAMD21 CircuitPython badge with a charlieplexed LED matrix, IR badge-to-badge communication, navigation buttons, SAO header, and exposed pads.
Unofficial ESP8266 proximity-animation badge
BadgeBuddy was an unofficial GrrCON 2024 electronic badge built for roughly thirty friends, using an ESP8266 WiFi module, an 8x8 LED matrix, battery power, proximity scanning for other BadgeBuddy SSIDs, and a public code/wiring archive.
NFC treasure-hunt and LED badge
The second electronic DORS/CLUC badge, built around NFC tag hunting, badge-to-badge interaction counters, LED-display modes, USB configuration and passthrough behavior, a simple game, open source files, and a public production all-nighter writeup.
Independent CH32V003 bare-metal UART crypto-puzzle badge offered toward DEF CON 34
K Badges' maker-controlled Tindie listing identifies Ouroboros as a $29.99 bare-metal RISC-V-assembly electronic badge on a CH32V003, with a custom UART cryptographic puzzle, a 12-LED Charlieplexed matrix, a circular single-layer PCB with exposed traces, and a hand-soldered two-AA configuration. Its August 4, 2026 storefront snapshot is out of stock; the seller says a new order is coming and hopes to bring some to DEF CON, rather than confirming units, arrival, pickup, or delivery. In a first-person r/Defcon announcement, the maker says they created the project and links the Tindie page and a GitHub technical explainer, while separately offering to arrange a DEF CON pickup by email for Tindie buyers. The product also makes 115200-baud puzzle, cryptographic-framework, low-power, and performance statements, but neither the product nor the maker-linked generic AVR framework establishes a released matching CH32V003 firmware or hardware package. This is a source-backed independent pre-event maker offering, not an official DEF CON badge, registration credential, confirmed fulfillment, verified cryptographic implementation, hardware-safety record, or reusable-image source.
Source-backed RP2040 LED-matrix conference badge
Security Fest 2026's public firmware repository identifies this as the official conference badge: a small, hackable RP2040 device with a 9×9 LED matrix, six buttons, USB surface, and public firmware. The official event site confirms the completed May 28-29 Gothenburg conference, while a contemporaneous attendee report credits Carl Vargklint's badge work. Allocation and delivery are not documented.
MIT-licensed ESP32-S3 badge with Doom, MicroPython, and IR boop
An official Temporal Replay 2026 developer-conference badge documented by the MIT-licensed temporal-community/badge.temporal.io repository as an ESP32-S3 app platform with an OLED and LED matrix, a Doom port, MicroPython, and infrared boop badge-to-badge networking, for the May 5-7, 2026 event in San Francisco.
Post-event Pimoroni Blinky 2350 developer-conference badge; organizer allocation unverified
A public post-event app archive by Mainak Sarkar identifies a Pimoroni Blinky 2350 badge as handed out at Workday DevCon 2026 and says it ran the badgeware MicroPython operating system and app launcher. Workday's official pages establish the completed June 1-4 Las Vegas developer conference, but do not directly document badge issuance, recipient allocation, custom hardware, event firmware, or image rights. This is therefore a source-backed event badge record with intentionally limited organizer attribution.