Sovereignty has always been at the heart of Bitcoin, and few expressions of it are as powerful as building your own signing device from scratch. That is exactly what SeedSigner enables you to do. With less than $50 in parts and a simple 3D-printed enclosure, you can assemble a fully functioning, air-gapped bitcoin signing device right at home.

Step 1: Print the Open-Source Enclosure

The process begins with an open-source enclosure design. Members of the Bitcoin community have created and refined several models optimized for Raspberry Pi Zero hardware. By downloading and printing one, you create the physical shell for your device.

Step 2: Gather and Assemble Components

From there, you gather the components: a Raspberry Pi Zero, a small LCD display, a camera module, and a microSD card. Once assembled inside the enclosure, the final step is to flash the SeedSigner software onto the card.

Step 3: Power Up Your Signing Device

When the device boots, it transforms into a complete signing tool. You can generate seed phrases with dice rolls or photo entropy, sign bitcoin transactions offline using QR codes, and interact seamlessly with wallet applications. And because you built the device yourself, you know exactly what is inside. There are no hidden chips, no tampering, and no supply chain risks. Every element is transparent and verifiable.

Why DIY Matters

This DIY approach offers more than just hardware—it deepens your understanding. By printing the case, assembling the components, flashing the software, and testing the device, you move from being a passive user to an active participant. That hands-on knowledge provides not only confidence, but also resilience.

A Declaration of Independence

A DIY SeedSigner is not just a hardware wallet. It is a financial declaration of independence. It reflects the cypherpunk ethos of Bitcoin: build it, verify it, and never outsource trust. For those who want to take control to its fullest extent, a 3D-printed SeedSigner is more than a tool—it is sovereignty in your hands.