An air-gapped, camera-and-QR-code based Bitcoin signing device built around the open-source SeedSigner project. We source and assemble the hardware. The firmware — and verifying it — is yours to own.
Every part needed to build a SeedSigner yourself: Raspberry Pi Zero (or Zero 2 W), Waveshare LCD HAT, camera module, GPIO header, tactile buttons, and a 3D-printed case. No soldering required. Pair it with our Assembly Jig if you want the parts held steady while you build.
Everything in the parts kit, already assembled and bench-tested for power, display, camera, and button function. The microSD card ships blank. You still download, verify, and flash the firmware yourself before first use — we don't offer a pre-flashed option.
No pre-flashed option is offered, and won't be — see below.
SeedSigner is an independent, donation-funded open-source project. Behind the Curtain has no affiliation with and no control over the SeedSigner firmware — we build hardware for it. Verify your download against the upstream signed release before you trust it with real funds.
Every part in this kit is available separately from other suppliers — that's the nature of open hardware. What you're paying for here is time: a known-good combination of board revision, display, and camera that we've already tested together, instead of you finding out about a fitment or compatibility quirk after ordering.
What you're still responsible for, no matter where the parts came from:
Full walkthrough: How to verify your device →