S ShieldSigner / build & use0.0.2-dev

TASK 02

Buy & source the parts

A complete shopping list: carrier components and the separate system parts.

You need
  • Your PCB/PCBA route
  • Luckfox Mini storage variant
You’ll have

Every carrier line identified, plus the parts needed to finish the device.

Your shopping list

Ordering an assembled carrier? Buy the separate system parts below. Hand assembling? Switch to Carrier / PCBA to see all 21 component lines.

Quantities for 1 boardBOM CSV · per PCB ↓

Buy separately · 10 items

These are outside the 43-piece PCBA BOM. Card choices are alternatives; buy the one that fits your workflow.

Exact panel not yet qualified1 required

2.8-inch ST7789 bare LCD

240×320, 40-pin 0.5 mm FPC; reference envelope 47.8×66.95×2.13 mm. Contact orientation/backlight must match.

Not a confirmed buy-ready substitute. Reject HS280S010B/C2939938 14-pin board; request exact panel drawing before buying.

Match boot medium1 required

microSD + USB card reader

Removable microSD with enough capacity for the selected image; card reader for your Mac. Use a known-good card from a reputable supplier.

Power budget requires bench test1 required

Regulated 5 V USB-C supply + cable

One regulated 5 V source. This carrier is not a charger or USB-PD design; do not power multiple inputs together.

Assembly operation1 required

Module mounting + insulation

Direct solder or compatible shortened 11-pin socket strips per upstream. Protect pins under the LCD. Socket strips are not in this default PCBA BOM.

Mechanical fit pending1 optional

Matching enclosure + hardware

Pico Mini all-in-one carrier case, matching PCB revision and soldered/header mounting. Camera mounting uses the upstream M2 arrangement; verify hardware lengths.

Our selected 2.5 mm switches differ from upstream TE actuator height. Check button alignment before printing a batch.

Signing option1 optional

Contact Satochip card

Factory-installed applet; contact-capable product. On-card derivation/signing; choose this instead of SeedKeeper when that is your goal.

DIY alternative1 optional

Blank supported JavaCard

J3H145 or reviewed JCOP SECID alternative with known GlobalPlatform management keys. Install an applet before use.

Use the carrier table for PCB components

  • For PCBA, JLC sources the 43 fitted carrier pieces from the uploaded BOM. You do not need a second loose set.
  • For hand assembly, filter Carrier parts and buy the listed quantities. All C-codes link to their supplier listing.

Buy the separate system parts

  • Luckfox Pico Mini; verify SD boot compatibility. Pro/Max/Pi modules are different targets.
  • Exact 2.8-inch ST7789 bare 40-pin FPC panel; compatible SC3336 camera/ribbon; case; microSD; regulated 5 V USB power.
  • Add a contact SeedKeeper for storage or Satochip for on-card signing. Cards are optional for ordinary host signing.

Confirm the unresolved substitutions before checkout

  • HS280S010B / C2939938 is not a drop-in LCD: it is a 14-pin module.
  • Do not use a bottom-contact LCD connector in place of J401’s selected top-contact part.
  • A case or retail carrier may have a different revision/reader suffix from this variant. Confirm its bundle contents and firmware configuration.
Continue the buildCompile the software →
Sources & deeper reference

Checked 12 October 2026. Menu names can vary with firmware.

Per-component rationale ↗Catalog snapshot ↗Edit this workflow on GitHub ↗