Custom hybrid magnetic + mechanical keyboard (now 75%) — KiCad PCB, STM32F405, TMR sensors, designed from scratch.
Custom 4-layer interrupter control board for DRSSTC systems. STM32F405-based, fiber-optically isolated outputs, hardware E-brake safety chain, and controlled-impedance routing (90Ω USB, 50Ω FSMC/SDIO). Designed in KiCad 9.0.
Text prompt → KiCad schematic, BOM, and firmware. No templates — real wired circuits with computed values.