DEF CON 34 · United States · 2026
Planned open-hardware CH32V003 light-up Simple Add-On for DEF CON 34
The maker-owned public `keeloi79/not-a-crosswalk-sao` repository explicitly calls Not Just a Crosswalk a Simple Add-On (SAO) project for DEF CON 34. Its README documents a CH32V003 F4P6 RISC-V controller, eighteen side-emitting addressable LEDs, persistent palette/effect settings, two controls, 3.3 V host-badge power stepped to 5 V or a USB-C 5 V input path, and claimed SAO V1.69bis/V2.0 compatibility. The source tree includes documentation, schematics, firmware, build instructions, and a three-part license declaration: CERN-OHL-S v2 hardware, GPLv3 firmware, and CC BY-SA 4.0 documentation/creative works. This is a source-backed planned independent DEF CON 34 add-on, not evidence of a final manufactured run, price, sales channel, quantity, pickup, recipient, host-badge test matrix, electrical-safety validation, official DEF CON affiliation, admission right, or rights-cleared badge image.
People
The project README credits the CH32V003 WS2812 driver developed by Blake Sands and identifies it as GPLv3. This is a narrow upstream-driver credit, not a claim that Blake Sands designed, approved, built, or supports the Not Just a Crosswalk SAO.
SourceThe project README credits Tod Kurt's TouchwheelSAO repository structure and documentation style as inspiration. This retains the maker's stated inspiration credit without inferring hardware, firmware, manufacturing, or event-organization responsibility.
SourceThe project licensing declaration bears © 2026 @CAELYBR / keeloi79, and the public repository is published by the keeloi79 account. This records the source's explicit project-author/publisher credit without inferring legal identity, event affiliation, manufacture, or final distribution role.
SourceIt preserves a notably inspectable pre-event SAO project without converting a well-documented repository into a completed physical artifact. The project makes its design, firmware, purpose, and component licenses unusually clear, while the dossier keeps equally important limits visible: an SAO compatibility statement is not a universal host guarantee, public source material is not proof of a distributed final revision, and the repository's photo files are not automatically a cleared catalogue image set.
The project README identifies a CH32V003 F4P6 RISC-V microcontroller in TSSOP-20 packaging, eighteen side-emitting addressable LEDs, two tactile controls, ESD protection, a boost stage for 3.3 V SAO-host power, and an automatic path that disables the boost stage when USB-C 5 V is detected. It describes the board as compatible with SAO V1.69bis/V2.0. The same README calls the LEDs `WS2812-2020` in its overview and `SK6812D-EC3210R` in its feature list, so the catalogue preserves the shared eighteen-LED claim without selecting an unverified final LED part number. The sources do not identify a final assembled revision, power budget, host-badge matrix, connector orientation/pinout verification, battery, current/thermal measurements, compliance evidence, production quantity, or an event-unit test report.
The public repository includes firmware, documentation, schematics, and build material. Its README says the firmware stores palette and effect indices in CH32V003 flash memory, and documents a button on PD3 for effects and one on PD2 for palette selection. The project declares GPLv3 for firmware and attributes the CH32V003 WS2812 driver to Blake Sands. No reviewed source identifies a final event firmware binary, tagged production release, flashed-unit hash, support policy, upgrade/recovery procedure, or proof that an attendee unit runs a particular revision.
The maker frames Not Just a Crosswalk as a hardware-based visibility project and labels its contextual document “The Case for Visibility.” That source describes the board's persistent settings as part of the project's intended message. The public repository explicitly identifies DEF CON 34, but it does not name DEF CON as an organizer, say the project is included with registration, promise access, state a sales/pickup arrangement, or confirm a completed event outcome. The catalogue therefore records it as an independent planned SAO rather than a DEF CON credential or finished distribution.
Lifecycle
The README identifies a CH32V003 F4P6 RISC-V MCU and describes 3.3 V SAO-host input stepped to 5 V plus an automatic boost-disable path when USB-C 5 V is detected. It does not publish finalized USB-C hardware, board power budget, current/thermal measurements, fault behavior, host limitations, or safety/compliance results.
SourceThe README says palette and effect indices persist in CH32V003 flash memory and identifies a PD3 effect button and PD2 palette button. It does not establish a final firmware build, power-loss behavior across all revisions, input accessibility, user guide, release process, or recipient experience.
SourceThe README consistently specifies eighteen side-emitting addressable LEDs, while using `WS2812-2020` in the overview and `SK6812D-EC3210R` in its feature list. The record retains the shared count and source labels without deciding which part number, brightness, color order, current draw, or final layout was manufactured.
SourceThe project's licensing declaration assigns CERN-OHL-S v2 to hardware, GPLv3 to firmware, and CC BY-SA 4.0 to listed documentation and creative works. This supplies a clear technical-source trail, but its itemized scope does not by itself establish a cleared publication basis for each repository photo or a final event-unit configuration.
SourceThe maker labels Not Just a Crosswalk a Simple Add-On designed for DEFCON 34 and says it is SAO V1.69bis/V2.0 compatible. The repository does not provide a final unit, a standard-specific test report, a host-badge matrix, connector orientation proof, electrical budget, or universal interoperability guarantee.
SourceOperational history
The catalogue preserves the documented architecture and declared licenses without asserting a particular part population, full standard conformance, reproducible attendee firmware, or a final supported release.
The planned record remains source-backed and image-free rather than copying repository photos, README media, renders, screenshots, third-party posts, placeholders, or generated approximations.
The record does not convert a component/design narrative into a safety endorsement, universal host-power guarantee, electrical specification, or modification instruction.
The catalogue records a real, explicitly DC34-associated public design without upgrading it into an official badge, a conference credential, a completed physical distribution, or a sale/fulfillment claim.