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SeedTapper – Air-gapped Seed Engraver

Open-source air-gapped machine (Pi 5 + fiber laser) that engraves Bitcoin seed plates in titanium.

BTC Tech Nerd Army Aside from being a full-time BTC engineer, I'm a father to amazing children and a husband to an incredible wife. Family is the whole reason I'm in Bitcoin. So what happened with the Coldcard hack isn't a tech story to me. Families lost generational wealth. Show more

4:34 PM · Jul 31, 2026

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hardware bitcoin open source security

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Jul 31, 2026