SeedSigner - Full Kit

The SeedSigner is an open-source, air-gapped Bitcoin signing device designed for Bitcoiners who value true self-custody and verifiable security. Built from off-the-shelf components you can source yourself, this DIY hardware wallet puts your private keys completely offline — no proprietary chips, no trust required.

What makes SeedSigner different?

Unlike commercial hardware wallets, the SeedSigner is stateless — meaning it never stores your private keys. Each time you use it, you scan your seed phrase via QR code, sign your transaction, then power it down. Your keys exist only in the moment they're needed, then vanish. No firmware backdoors, no supply chain attacks, no lingering secrets in memory.

The device is built around a Raspberry Pi Zero (1.3 or newer recommended) paired with a Waveshare LCD HAT and a camera module — all readily available components that you can verify yourself. The entire build, software, and schematics are open source on GitHub, meaning anyone can audit the code, reproduce the hardware, or contribute improvements.

Key Features:

• Fully air-gapped — never connects to the internet
• Stateless design — no permanent key storage
• QR-based transactions — scan PSBTs from your watch-only wallet, sign offline, broadcast from a separate device
• Open source hardware & software — complete transparency, no black boxes
• DIY friendly — build it yourself from common parts, or grab a pre-assembled unit
• Compatible with major wallets — works seamlessly with Sparrow, Specter, BlueWallet, and more

Why SeedSigner matters:

Self-custody isn't just about holding your own keys — it's about knowing, with certainty, that no one else can touch them. The SeedSigner embodies the ethos of "don't trust, verify" by putting every component, every line of code, and every security decision in your hands.

Whether you're a first-timer learning the ropes of multisig setups or a seasoned Bitcoiner hardening your cold storage strategy, the SeedSigner offers a powerful, transparent, and genuinely sovereign solution.

What's included:

• Raspberry Pi Zero (specify version)
• Waveshare LCD HAT
• Camera module
  
  What YOU will need:
• OPTIONSAL: Custom 3D-printed enclosure (or print your own!)
• SD card with SeedSigner firmware (flash it yourself from GitHub - zero trust so we wont sell these with firmware installed - don't worry, its easy.)

As with all our products, we link to the original project source — SeedSigner on GitHub — where you'll find everything needed to build, verify, and customise your own device. This is an evolving project with an active community pushing updates and improvements regularly.

Not sure where to start? Check out our SeedSigner setup guide (coming soon) for step-by-step instructions, tips on sourcing parts locally in Australia, and how to integrate it into your existing wallet setup.