SovrnBitcoiner on Nostr: https://img.sovrn.ninja/uploads/original/dd/be/9701741ef6c849862177b7caee6e.jpg ...

LNBits released a DIY FOSS Nostr signing device using ubitcoin for use with Horse. Hardware is available directly on store.
https://lnbits.github.io/nostr-signing-device