5.0 KiB
| title | project | date | status | tags | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| HBOX Watchdog v3 PROD — LCSC / JLC Assembly Parts List | Project Drogheda | 2026-07-06 | §1 specialty parts VERIFIED against JLC live stock (2026-07-06). Passives/common semis → JLC auto-match. LCSC filled into production/HBOX_v3_PROD_bom.csv. |
|
HBOX Watchdog v3 PROD — LCSC parts list (for JLC assembly)
Quantities are per board — JLC multiplies by your order qty (5). LCSC C… numbers below were
pulled from JLC's live parts search on 2026-07-06; stock moves, so re-confirm at upload.
⚠️ Three decisions to make before ordering
- Inductors L2/L6/L7 — the Bourns SRU8028 are OUT OF STOCK at JLC (pre-order only). I found in-stock Sunlord MWSA0804 drop-in candidates below — but they're 8.8×8.2 mm vs your footprint's 8.0×8.0 mm. Confirm the pads overlap (they usually do for 2-pad molded 8×8s) before you commit, or pre-order the exact Bourns (adds weeks). The Sunlord are actually higher-rated (10 µH @6.5 A, 2.2 µH @14 A vs Bourns 2.2 A / 8 A).
- F1 PPTC voltage — pick the rating for the rail F1 sits on. If it's on the 24 V input, use the 24 V part; if on a 5 V / battery node, the genuine Littelfuse 6 V is fine.
- MP1584EN (U2/U7) has only one in-stock variant (C15051, SOIC-8-EP) — everything else is pre-order/consign. Fine, just don't let auto-match pick a 0-stock clone.
§1 — Specialty parts — VERIFIED LCSC (live JLC, 2026-07-06)
| Ref(s) | Qty | LCSC # | MFR Part | Pkg | Type · Stock | Notes |
|---|---|---|---|---|---|---|
| U6 | 1 | C687163 | LTC4040EUFD#TRPBF (ADI) | QFN-24 4×5 | Ext · 2341 | The critical charger IC. |
| U2, U7 | 2 | C15051 | MP1584EN-LF-Z (MPS) | SOIC-8-EP | Ext · 10527 | Only in-stock variant. |
| U3 | 1 | C2848306 | SHT40-AD1B-R3 (Sensirion) | DFN-4 1.5×1.5 | Ext · 9534 | R2 alt: C2909890 (stock 12772). |
| U4 | 1 | C99269 | TMP102AIDRLR (TI) | SOT-563 | Ext · 898 | Cheaper high-stock UMW clone: C5692997 (10143). |
| L2, L7 | 2 | C17700171 | MWSA0804S-100MT (Sunlord) | 8.8×8.2 | Ext · 109 | 10 µH 6.5 A — SUB for SRU8028-100Y; verify pads. |
| L6 | 1 | C17700165 | MWSA0804S-2R2MT (Sunlord) | 8.8×8.2 | Ext · 261 | 2.2 µH 14 A — SUB for SRU8028-2R2Y; verify pads. |
| Q10 | 1 | C2624 | IRFR5305TRPBF (Infineon) | DPAK/TO-252 | Ext · 45808 | Genuine Infineon, huge stock. |
| Q7 | 1 | C35349 | AO4406AL (AOS) | SOIC-8 | Ext · 2039 | Cheap high-stock UMW: C2944312 (62071). |
| RS1 | 1 | C7420012 | FRM121WFR008TM (FOJAN) | 1206 | Ext · 20959 | 8 mΩ 1 W ±1% sense. Premium alt: Vishay WSLP C2076276. |
| D10 | 1 | C224019 | SMBJ33A (Littelfuse) | SMB DO-214AA | Ext · 28875 | Cheapest high-stock: C353366 (Jingdao). |
| DZG | 1 | C80857 | BZX84C15LT1G (onsemi) | SOT-23 | Ext · 26047 | 15 V zener. |
| F1 | 1 | C20627123 | 1812L300/24GR (LUTE) | 1812 | Ext · 69432 | PPTC 3 A 24 V. If node ≤6 V use genuine Littelfuse C127824 (6 V). |
| SW4G | 1 | C2689642 | PTS636SK25SMTRLFS (C&K) | SMD 6×3.5 | Ext · 7882 | Reset button. Gull-wing SMD — confirm vs footprint pads. |
§2 — Common semiconductors → JLC Basic, let auto-match fill (search MPN to confirm)
| Ref(s) | Qty | MFR Part | Pkg |
|---|---|---|---|
| Q1 | 1 | AO3401A (P-ch) | SOT-23 |
| Q2, Q4 | 2 | AO3400A (N-ch) | SOT-23 |
| Q5, Q6 | 2 | MMBT3904 (NPN) | SOT-23 |
| D2, DBK, DBK2 | 3 | SS34 (40 V 3 A Schottky) | SMA |
| D5 | 1 | BAT54 | SOD-123 |
| D6 | 1 | 1N4148W | SOD-123 |
| D1, D4G, DB1–DB4 | 6 | LED 0805 | 0805 — pick color per function |
These are all JLC Basic/common; on BOM upload JLC auto-suggests an in-stock part. Want me to fill exact LCSC #s for these too? Say the word.
§3 — Resistors (0603 — auto-match, or pick any Basic)
Standard (5%): 1 k ×5 · 10 k ×10 · 100 k ×8 · 4.7 k ×2 · 330 R ×4 · 5.1 k ×2 · 40.2 k ×2 · 100 R ×2 · 22 k · 20 k Precision 1% (0603): 19.1 k · 10 k ×2 · 825 R (R50, LTC4040 PROG) · 287 k · 100 k ×3 · 499 k · 31.6 k
§4 — Capacitors (auto-match; confirm voltages)
100 nF 0603 ×7 · 10 nF 0603 ×2 · 2.2 nF 0603 ×2 · 2.2 µF 0603 · 10 µF 0805 ×2 · 22 µF 0805 ×3 (≥16 V) · 22 µF/16 V 0805 · 22 µF/50 V 1210 · 47 µF 1210 ×2 (≥25 V) · electrolytics 47 µF/50 V (C10), 47 µF (C3), 100 µF/6.3 V (C43) — 6.3×7.7 body, verify fit.
§5 — Do NOT put on the JLC SMD BOM
Hand-solder (THT): Phoenix P1 · JST P2, P4, P5, P6, P8, P10, P11, P12 · sockets J1, J2 (2.54) · J7, J8 (2.0) · MOD1 (Pro headers) · relay K1 · tactile SW1.
No part: MH1–MH4 · TP1, TP2 · JP1–JP4.
Modules (plug in after): Blackpill → J1/J2 · simpleRTK2B Pro → MOD1 · 4G NTRIP Master → J7/J8.
J9 USB-C (USB4085): hand-solder recommended (or search USB4085 to have JLC place it).
DNP — drop before assembly: P3, P13, H3 (set the real DNP flag or delete their BOM rows; THT anyway).