SeedSigner: DIY Bitcoin Signing Device

May 27, 2022

This comprehensive how-to guide walks you through unboxing, setting up and signing bitcoin transactions with the air-gapped SeedSigner device.

This guide by @econoalchemist was published in Bitcoin Magazine.

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This guide demonstrates how to self-custody bitcoin using the SeedSigner. SeedSigner is a project that brings together free and open-source code, inexpensive and general-purpose hardware, and a do-it-yourself (DIY) approach to taking personal responsibility of your bitcoin.

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Unboxing #

This section demonstrates what is included in the full SeedSigner kit. The kit can be purchased from BTC Hardware Solutions with worldwide shipping available. Alternatively, EU/U.K. customers can purchase the kit from GoBrrr or DIYNodes, and Philippines customers can use TechHaven.

What is Coldcard?

July 3, 2020

This guide by Bitcoin Q+A was published on bitcoiner.guide website.

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What is Coldcard? #

Coldcard is a hardware wallet designed by the Coinkite team. A hardware wallets is a device with one main purpose, to keep your bitcoin private keys safe and secure. Anyone with access to your private keys has access to all of the bitcoin in that wallet. Coldcard does not come with its own app or any additional software. What you connect it with is completely up to you.