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.