Creative Hardware
A Handheld Calculator, a USB Reference Design, and an Early Security Key — Three Open Hardware Boards Worth Watching
Tindie's November roundup of open KiCad hardware covers NeoCalculator, a handheld calculator built on an ESP32-S3 with a 50-key matrix; IV-DCY, a compact STM32-based USB reference design; and Cardea Key, an early-stage security key pairing an RP2354A with an NXP secure element. All three publish full schematics and PCB layouts, with the usual early-hardware caveats attached.