102 lines
6.2 KiB
Markdown
102 lines
6.2 KiB
Markdown
---
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tags: [project-drogheda, bom, sourcing, hardware]
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project: Project Drogheda
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author: Helgen CTO
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date: 2026-06-20
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status: Active
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---
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# BOM Maestro — HBOX + Gabinete (24 V)
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> Updated master BOM for the **24 V** Drogheda unit (the dominant ICAVE variant).
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> Costs in **MXN**, from `Selección de componentes para gabinete2.xlsx` and the
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> H-BOX BOM sheet. This supersedes the older loose BOM. For 12/48/110/230 V
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> variants only the cabinet power/protection parts change (see source sheet).
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> **Why this exists:** the earlier BOM drifted from reality. This pins the **as-built**
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> parts (so diagnosis/PCB work targets the right hardware) and flags the
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> **change-list** for the production fix.
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## 1. HBOX — internal unit (per unit, 24 V)
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| # | Item | Marca / Modelo | Qty | MXN | Notes |
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|---|---|---|---:|---:|---|
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| 1 | H-BOX Case | Helgen Series1 (**ASA print**) | 1 | 100 | UV-stable, ~95–100 °C — adequate |
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| 2 | H-BOX Top | Helgen Series1 (**ASA**) | 1 | 50 | |
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| 3 | DC PSU bracket | Helgen Series1 (ASA) | 1 | 20 | |
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| 4 | Battery Case | Helgen Series1 (ASA) | 1 | 30 | houses 18650 |
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| 5 | SIM | Telcel micro | 1 | 100 | per-unit data plan |
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| 6 | **GNSS RTK** | Ardusimple simpleRTK2B **Pro** (AS-RTK2B-PROF9P-L1L2-NH-00) | 1 | 3,340 | ZED-F9P |
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| 7 | **4G/NTRIP** | Ardusimple 4G NTRIP Master (AS-XBEE-4G-NA-UFL-00) | 1 | 2,440 | XBee LTE |
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| 8 | **MCU watchdog** | DFRobot STM32F411 Blackpill | 1 | 104 | runs `blackpillrtkcode_v2` |
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| 9 | GNSS antenna | Ardusimple AS-ANT2B-ANN-L1L2-50SMA | 1 | 700 | multiband |
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| 10 | LTE antenna | Unit Electronics AR1582 (SMA→IPEX) | 2 | 42 | 4G diversity |
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| 11 | Headers F 6/8/10-pin | 2.54 mm | 1ea | 10 | board interconnect |
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| 12 | **5 V supply** | **Mean Well SD-15B-05** (18–36 V→5 V, 3 A) | 1 | 300 | ✅ industrial — keep |
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| 13 | Boost / charger | Adafruit **PowerBoost 1000C** (2465) | 1 | 400 | battery path — review |
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| 14 | **Ignition cond.** | DFRobot **DFR1015** buck | 1 | 106 | **v3: ON-BOARD** — GX16 pin 3 = raw ignition (12–24 V) → DFR1015 → PA5 (digital) |
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| 15 | **Battery** | Hyvel **18650 1S4P** (FG-0889, 3.6 V) | 1 | 204 | ⚠ charge ≤45 °C — decide |
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| 16 | Status LED + holder | Steren 5 mm + bezel | 1 | 3 | PB0 path |
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| 17 | Resistor | 1.5 kΩ (use TBC — see watchdog-schematic) | 1 | 1 | verify value |
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| 18 | **HBOX↔cabinet** | **GX16-5** macho/hembra | 1 | 22 | ✅ locking — keep |
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| 19 | Watchdog discretes | 2N3904, IRF9540N, 2N7000, R (1k/10k/220Ω) | — | — | → consolidate on PCB |
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| 20 | Dupont terminals | red + black | 2 | 4 | ⚠ vibration — eliminate |
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| 21 | Wire, glands, screws, label, switch | genérico / Steren | — | ~110 | NPT 3/8 gland |
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| | **HBOX subtotal** | | | **≈ 8,041** | |
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## 2. Gabinete — cabinet (per unit, 24 V)
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| Item | Marca / Modelo | Qty | MXN |
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|---|---|---:|---:|
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| Enclosure IP67 (ABS) | Yetlebox **P3901** (39×29×16) | 1 | 1,435 |
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| DIN rail | Weidmüller TS 35×7.5 | 1 | 50 |
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| Neutral terminals | Weidmüller WDU 2.5 | 5 | 58 |
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| Ground terminals | Weidmüller WPE4 | 4 | 154 |
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| Fuse-holder terminal | Phoenix **PT 6-FSI/C** (3212166) | 3 | 900 |
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| End stops | Wago 249-116 | 4 | 56 |
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| Ignition SSR | Weidmüller **TOS 24VDC 2A** | 1 | 684 |
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| Surge (SPD) | Phoenix **TTC-6-TVSD-C-24DC-PT-I** | 2 | 1,076 |
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| Breaker | Phoenix **TMC 81C 05A** | 1 | 484 |
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| **Supply → 24 V** | Mean Well **DDR-60G-24** | 1 | 748 |
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| Fuse (blade) | automotriz **2 A** | 3 | 6 |
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| Cable / ferrules / glands / labels | Indiana / Weidmüller / Helgen | — | ~110 |
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| Shipping to port | — | 1 | 600 |
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| **Cabinet subtotal** | | | **≈ 6,365** |
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**≈ Total per 24 V unit: ~14,400 MXN** (HBOX ~8,041 + cabinet ~6,365). An
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alternate supplier ("Israel" column in the sheet) shows ~1,284 MXN/cabinet
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savings at 24 V — sourcing decision lives here in `09_`.
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## 3. ✅ What's already good (don't re-buy / don't duplicate)
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- **Cabinet** is industrial-grade: SPD + breaker + isolated SSR ignition + Mean
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Well 24 V. The HBOX needn't re-implement input surge/protection.
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- **SD-15B-05** (24→5 V, 3 A) is a real industrial supply — keep.
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- **GX16-5** locking HBOX↔cabinet connector — keep (good vibration practice).
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## 4. ⚠ Change-list for the production fix (feeds the PCB + hackathon)
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| Change | From → To | Why | Ref |
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|---|---|---|---|
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| Inner case | **ASA — keep** (adequate); optional metal / plate-mount | conduction, not material, is the lever | RCA, hardware-brief §2b |
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| Internal wiring | **Dupont/hand-wire → PCB + locking connectors** | vibration intermittents | hardware-brief §4 |
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| Battery path | **RESOLVED 2026-06-24: keep 18650 1S4P + LTC4040 charger** (NTC temp-qualified; MCU cuts charge when cell hot). Proto stand-in = TP4056+MT3608 | runtime needed → fix the *charging*, not the cell | `watchdog-electrical-design-state.md` |
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| Fuse | **verify the 2 A blade** vs measured worst-case + inrush | client's "under-rated fuse" | RCA H5 |
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| Watchdog discretes | **2N3904/IRF9540N/pull-ups → integrated load switch on PCB** | fewer parts, defined turn-on | hardware-brief §4 |
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| SIM | micro-SIM buried → **front-panel SIM or MFF2 eSIM** | maintainability | hardware-brief §6.2 |
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| Thermal | **v3.0: waterproof duct + Blackpill smart fan** (active managed) + conduct to plate / sunshade | a *ducted* fan removes heat without breaking IP67 | hardware-brief §2b, RCA |
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## Open Questions
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- [ ] Confirm the **installed blade-fuse value** (2 A may be under-rated for LTE inrush).
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- [x] ~~Battery decision (drop vs LiFePO4 vs supercap)~~ → **RESOLVED 2026-06-24: 1S4P + LTC4040** (NTC temp-qualified charging). Now: **confirm the pack Ah** (label says 40 Ah — suspect; 4× 18650 ≈ 10–14 Ah) → it sizes the charge current + the LTC4040 safety timer.
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- [ ] Lock supplier per line (Helgen vs alternate quote) for the August batch.
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## Related
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- [[CLAUDE|Master Index]] · [[03-Architecture-Hardware/cabinet-electrical-bom|Cabinet BOM detail]] ·
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[[03-Architecture-Hardware/hardware-respec-and-pcb-brief|Hardware re-spec + PCB brief]] ·
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[[03-Architecture-Hardware/watchdog-schematic|Watchdog schematic]]
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- **[[03-Architecture-Hardware/watchdog-electrical-design-state|Electrical design state & assumptions (CANONICAL)]]** ·
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`watchdog-protoboard-BOM-3boards.xlsx` + `watchdog-LISTA-DE-COMPRAS-ES.xlsx` (proto BOMs, 3 boards)
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