# few.guide

> Free, step-by-step Bitcoin self-custody guides in plain words: build a SeedSigner, make a dice seed, run an Umbrel node, use Fedi, harden a phone with GrapheneOS. Plus a live SeedSigner parts tracker.

All content is free to read and quote with a link. Each guide has a clean markdown version (append .md instead of .html).

## Guides

- [Set up a SeedSigner with Sparrow](https://few.guide/guides/seedsigner-sparrow.md): Build a signer that never goes online, then use it with Sparrow Wallet.
- [Make a 24-word seed with dice](https://few.guide/guides/dice-seed.md): Roll your own seed by hand. Let an offline SeedSigner add the last word.
- [Run your own Bitcoin node with Umbrel](https://few.guide/guides/umbrel-bitcoin-node.md): A small home computer that checks every bitcoin payment for you.
- [Run a Lightning node with Umbrel](https://few.guide/guides/umbrel-lightning-node.md): Fast, cheap bitcoin payments from your own node. Spending money only.
- [Install GrapheneOS on a Pixel](https://few.guide/guides/grapheneos-pixel.md): Swap the phone’s Google software for a hardened, private system.
- [Get and use a Freedomia card](https://few.guide/guides/freedomia-card.md): A prepaid Visa card you top up with bitcoin. No ID check.
- [Set up Fedi](https://few.guide/guides/fedi-wallet.md): Community custody of bitcoin: private ecash, Lightning, chat and mini apps in one.
- [Get an eSIM and a phone number with nadanada](https://few.guide/guides/nadanada-esim.md): Mobile data and SMS numbers, paid with Lightning. No account. No ID.

## Quick answers

- [What parts do I need to build a SeedSigner?](https://few.guide/answers/seedsigner-parts-list.md): A Raspberry Pi Zero (2 WH is best), a 1.3-inch 240×240 LCD HAT, a Pi Zero camera with the short ribbon, a microSD card and a micro-USB power cable. No soldering if the pins are on.
- [How do I verify SeedSigner firmware?](https://few.guide/answers/verify-seedsigner-firmware.md): Download the .img, the .sha256.txt and the .sha256.txt.sig from SeedSigner’s GitHub releases, then use Sparrow’s Tools → Verify Download. You want three green ticks.
- [SeedSigner or Coldcard?](https://few.guide/answers/seedsigner-vs-coldcard.md): SeedSigner: you build it from cheap parts, it stores nothing and forgets your keys at power-off. Coldcard: a ready-made device that stores your seed on two secure chips from different makers.
- [How do I get an eSIM without ID?](https://few.guide/answers/no-kyc-esim.md): Buy one from nadanada with Lightning. No account, no email, no ID. Plans for 190+ countries from $0.99.
- [How do I make a seed phrase with dice?](https://few.guide/answers/dice-seed-phrase.md): Roll a die 253 times for words 1–23 (1–3 = 0, 4–6 = 1, 11 rolls per word), then let an offline SeedSigner calculate word 24.
- [How do I connect Sparrow to my Umbrel?](https://few.guide/answers/sparrow-umbrel-connect.md): Install Electrs on Umbrel, then in Sparrow choose Server → Private Electrum, host umbrel.local, port 50001, SSL off. On a Mac, allow Sparrow under Local Network.
- [Can a 2-of-3 multisig from Sparrow be used in Nunchuk?](https://few.guide/answers/multisig-sparrow-nunchuk.md): Yes. Export the wallet descriptor from Sparrow and import it into Nunchuk. Same addresses, same signers.

## Parts tracker

- [SeedSigner parts (markdown)](https://few.guide/parts.md): parts and pre-built units with stock and price
- [parts.json](https://few.guide/parts.json): same data as JSON
- [Atom feed](https://few.guide/parts.atom)

## Optional

- [Full text of every guide](https://few.guide/llms-full.txt)
- [What changed](https://few.guide/changes/): weekly release notes for the tools in our guides
- [Sitemap](https://few.guide/sitemap.xml)

## Sponsor

- [Sponsor few.guide](https://few.guide/sponsor/): One slot, sold weekly, paid up front by Lightning. Starts at 50k sats/week, +10% after each sale. Openly marked. Guides stay free.