This folder contains hardware design files for SeedSigner electronics projects. Source files are provided in a range of formats including KiCad, Circuitmaker, and EasyEDA.

The SmartcardHat/ folder contains the design files for a CCID/PCSC compatible Smart Card interface hat that connects over UART through a standard Raspberry Pi GPIO header (using the SEC1210-URT or SEC1210-UR2 serial interface). It also provides a USB-C socket for powering the device. Available in full-sized card, SIM-sized card, and dual-slot variants. See the SmartcardHat readme for full details.

The SeedSignerPlus display hat design files are maintained in a separate repository:

👉 seedsigner-hardware — SeedSignerPlus Display Hat

The SeedSigner+ Smartcard combo hat/ folder contains the design files for a hat that integrates the SeedSignerPlus display hat and the Smartcard hat functionality into a single board.