THE KNOWLEDGE BASE
Build knowledge.
Hardware decisions, card compatibility, firmware and assembly—all in one place.
37 guides
Display, buttons & first-article electrical checks
HOTHMI initialization, all eight button paths, image readback and pending powered measurements.
↗SourcesAll hardware datasheets
Local PDFs for all 18 factory BOM SKUs, display and host modules.
↗BuildPCB order readiness & current gates
Four-layer main carrier, factory service points, native checks, matched files and first-article assembly limits.
↗HardwareCarrier PCB & firmware compatibility
Exact host/LCD/button maps and why the working bench firmware must not be used unchanged on the carrier.
↗SoftwareFirmware images, staging & verification
One canonical image location, immutable named staging, preserved caches and image identity checks.
↗SoftwareCurrent LVGL firmware & test status
Linux, Python, LVGL and Rust camera responsibilities; scoped memory measurements and the tested bench image.
↗SoftwareMemory, Python and threads
Measured RAM use, shared Python imports, camera workers, LCD buffers and compressed RAM swap.
↗HardwareLuckfox Mini pinout & signal map
All 22 pins, voltage domains, SPI/I2C/UART/PWM alternatives and checked carrier connections.
↗BuildSwitch & USB-C revision
Manufacturer drawings, shared-supplier parts, new lands and measured-height buttons.
↗Start hereStart here: projects, versions & build paths
How SeedSigner, ShieldSigner, Luckfox firmware and this prototype fit together.
↗UseSoftware features & defaults
Signing, smartcards, optional tools and what the pinned image actually enables.
↗UseWallets, secrets & backups
SeedQR, passphrases, descriptors, card storage, BIP85 and SLIP39 explained.
↗SupportTroubleshooting
Find the failing layer: boot, display, camera, reader, applet or wallet settings.
↗BuildPractical build tips
Match variants, inspect LCD pin numbering, isolate camera faults and test the reader in stages.
↗UsePractice multisig & missing-key recovery
A 2-of-3 laboratory plan, descriptor backups, all signing pairs and recovery with a key unavailable.
↗SourcesUseful upstream sources
Reviewed primary sources for hardware profiles, QR formats, smartcards and recovery.
↗BuildPrint and assemble the enclosure
Flat prints, camera fit, button mechanisms, fasteners and exploded 3D assembly.
↗BuildAssemble the modular carrier
JLC quote, through-hole headers, mounting and staged bring-up.
↗BuildModular carrier BOM
43 SMT placements / 18 SKUs with values, ratings and dated JLC sourcing.
↗BuildOptional DigiKey self-assembly
Separate commodity substitutions and purchase CSV; JLC remains the primary assembly path.
↗BuildDigiKey self-assembly BOM
Exact order codes for all 35 SMT pieces; shared JLC/DigiKey switches and USB-C.
↗HardwareEight-pin 2.8-inch pill carrier
Pill layout, reference eight-pin interface, dedicated LCD power and simple header assembly.
↗SoftwareHow this website works
Content sources, local previews, versioning, checks and deployment.
↗BuildStandard FPC build overview
Earlier standard FPC configuration; current pill has a separate assembly guide.
↗Start hereProject overview
The Luckfox carrier, current progress and project sources.
↗HardwareHistorical FPC hardware architecture
Preserved 40-pin FPC circuit; use the main carrier and display/button reviews for the current board.
↗HardwareEvery component explained
Standard FPC reference: what each of its 53 parts does, why it was chosen and how it connects.
↗HardwareKiCad board & tools
Native design, electrical checks and guarded editing tools.
↗HardwareHistorical FPC electrical review
Earlier FPC circuit review; the main carrier has its own display/button electrical review.
↗SmartcardsCards & the Linux reader
Socket wiring, SeedKeeper versus Satochip, and PC/SC over UART.
↗BuildStandard FPC parts & assembly
Standard FPC reference population and supplier matches; pill files are separate.
↗BuildStandard FPC component catalog
Reviewed part identities, quantities and supplier links.
↗BuildBring-up guide
Shared host/card tests and standard FPC details; start the pill assembly guide first.
↗BuildHardware test record
The evidence collected so far and the tests still to run.
↗SoftwareBuildroot & firmware
Pinned inputs, successful builds, caches and possible Linux-free work.
↗SoftwareThe tscircuit experiment
What the port preserves and where its checks stop.
↗SourcesDatasheets & references
Locally saved supplier drawings and manufacturer documents.
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