Ouroboros Badge (DEF CON 34)
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.