Cobalt DC34 Badge
Post-event source-documented RP2040 corporate-commission badge
trueControl's public Cobalt DC34 archive explicitly describes firmware and a board schematic for the Cobalt Badge at DEF CON 34. Its maker index groups the badge under DEF CON 34 at LVCC and labels it a corporate commission. The repository documents an RP2040-driven curved blue LED display badge with motion, ambient-light, touch, USB-C, firmware, and schematic surfaces. Those sources establish a maker-documented event-associated electronic artifact, not DEF CON issuance, an identified commissioner, attendee allocation, a credential function, or a completed recipient handoff.