Specter DIY
Specter DIY is an open-source, do-it-yourself hardware wallet project from the Specter suite. It turns commodity hardware into an air-gapped signing device that pairs with Specter Desktop for multisig and single-sig custody.
What It Is
- DIY hardware wallet: assembled from off-the-shelf parts (e.g. STM32-based discovery boards)
- Air-gapped: QR-based communication with the coordinator; no persistent USB data link
- Companion to Specter Desktop: signs PSBTs for wallets managed in Specter Desktop
- Open-source: firmware and build instructions are public
Key Features
- Generates and holds seeds, displays xpubs, signs transactions
- Integrates with Multisig setups alongside other signers
- Focus on verifiable, user-built custody rather than closed proprietary devices
- Part of the broader Specter ecosystem for Bitcoin self-custody
Security Model
Specter DIY trades tamper-resistant hardware for transparency and user control. There is no secure element; physical security and supply-chain verification are the user's responsibility.
Relation to Round Rock Bitcoiners
- Featured in Meetup #50 — On Self Custody & Entropy as a DIY custody option
- Existing wiki coverage of Specter Desktop as a coordinator
Resources
See also
- Specter Desktop — multisig coordinator software
- Krux — open-source signing-device firmware
- Custody Models — custody trade-offs