Year
Hacker conference badges documented for 2021, sorted by country.
Official role and competition badge-art variants
A conservative Ekoparty 2021 record for the official badge-artwork set preserved on Ekoparty's own site, covering attendee, speaker, workshop, ACFT first/second/third-place, ICFT player, and Lado B variants.
Hybrid-year badge with SAMD21, ESP32, e-paper, LEDs, and firmware restoration flow
BSides Canberra 2021 is source-backed by the official event page, an attendee production note, public firmware repository, schematic mirror, and Mos & Boo badge-hacking writeups documenting a shipped electronic badge with SAMD21, ESP32-PICO-D4, e-paper display, LEDs, capacitive touch, and firmware reflashing workflow.
Brisbane conference badge pickup and Connect-corner helper marker
CrikeyCon VII is represented by official archive, schedule, and event-page evidence for attendee badge pickup plus a CrikeyCon Connect badge that identified people available for informal information-security career conversations.
Online linux.conf.au ESP32-era SwagBadge and DagBadge hardware programme
linux.conf.au 2021's Open Hardware Miniconf is represented by a source-backed SwagBadge and DagBadge programme: badges were built and mailed to delegates, then covered by official software, hardware, SAO, test-jig, firmware, and show-and-tell sessions.
ESP32 North Sectoria RPG badge
NorthSec's official 2021 badge page and repository document an ESP32 electronic badge with Wi-Fi, BLE, 240x240 color LCD, NeoPixel RGB LEDs, six buttons, buzzer, UART serial port, micro-USB or external battery power, ESP-IDF firmware, and ten badge flags tied to the North Sectoria game theme.
Electronics-side DIY expansion badge
A deliberately minimal DIY badge focused on simple electronics, SAO, Qwiic/STEMMA QT, and component-level exploration rather than preloaded compute.
Ticket and certificate checksum camp record
A conservative non-electronic Camp++ 2021 record for attendee identity: the official camp pages document the ninth H.A.C.K. camp at Fort Monostor, ticket registration, no required personal data, end-of-event ticketing-data destruction, certificate checksum verification, and instructions to bring the ticket either on a device or printed.
First sticker-backed Kākācon puzzle trail
The organizer walkthrough for Kākācon 2021 documents the first Kākācon badge challenge, with the entry point printed on the backing paper of a Pepper Raccoon-designed sticker.
Philippine reboot-edition virtual badge and artwork archive record
ROOTCON's official archive places ROOTCON 15 on October 13-15, 2021 via Zoom Webinar and Discord, while the official sponsorship overview lists Human Badge benefits as virtual-only and the media server preserves ROOTCON 15 badge and lanyard artwork directories.
AVR/OLED Packet Hack Village badge with CTF binary-input mode
A source-backed Packet Hack Badge record for HITB+CyberWeek 2021 Abu Dhabi, documented by a first-hand Hackster project page and a public firmware repository.
Merch-bundle electronic badge kit for the online con
CarolinaCon Online 2021 offered a merch bundle with a CarolinaCon Online T-shirt, sticker, and a kit containing all parts needed to make that year's badge; after orders closed, the organizers began bulk-ordering shirts and badge supplies for shipment.
RP2040 New Normal macro-pad badge
An MK Factor official DEF CON 29 electronic badge built around Raspberry Pi's RP2040, a 1.8-inch LCD, six-button D-pad surface, SAO connectors, USB-C, speaker, coin-cell plus USB power behavior, UF2 firmware updates, HID macro-pad mode, and a New Normal challenge path.
KiCad badge canvas with MicroMod carrier variant
Thomas Flummer's Remoticon.2 badge project published a KiCad badge canvas for the 2021 virtual Remoticon, giving builders a Remoticon.2-shaped PCB with open prototyping space plus uploaded KiCad, artwork, Gerber, and MicroMod carrier-board files.
Hack Live customizable hotkey badge
Kernelcon 2021's Hacker HotKey was a customizable hotkey stream-deck badge configured for Hack Live voting, challenge sabotage, hint, and website-launch behavior, with public Arduino Leonardo firmware examples.
Source-limited Badge Intro artifact in the continuing HackRVA electronic-badge lineage
The RVAsec 2021 badge record is intentionally narrow: InfoconDB preserves a Badge Intro session at the November 4-5, 2021 Omni Richmond event, and HackRVA's current badge page describes an annual electronic badge lineage with schedules, games, surprises, sponsorship, and limited badge availability.
Official and unofficial MiniBadges documented by the archived 2021 SAINTCON page
SAINTCON 2021 is represented here by its archived MiniBadge collection page, which documents in-person registration/status MiniBadges, community and challenge MiniBadges, soldering and puzzle badges, sponsor or booth-distributed badges, and a separate unofficial badge section.
ESP32 retro-controller badge with LEDs, buzzer, accelerometer, and Wi-Fi
The THOTCON 0xB badge was a rescheduled-2021 Chicago electronic conference badge in a retro controller / circus-ticket form factor. Rob Rehrig's first-hand writeup documents an ESP32 main controller, reverse-mount RGB and single-color LEDs driven by an IS32FL3731 LED driver, capacitive touch buttons, piezo buzzer, accelerometer, 2.4 GHz Wi-Fi node behavior, IRC remote connectivity, and serial interface.