Smart Relay Design Requirements
Worked for 37 sec
Assuming you mean LCSC: No, not all components are currently available/assigned from LCSC.
LCSC-available in current BOM
- KF128-5.08-2P-AA terminals — LCSC stock shown
- LMR16030SDDAR buck regulator — LCSC stock shown
- ESP32-S3-WROOM-1U-N16R8 — LCSC stock shown
- AP2112K-3.3TRG1 — LCSC stock shown
- TPS2051CDBVR — LCSC stock shown, but wrong for requirement because it is 0.5 A class and USB host target is 1 A
- STTH212S diode — LCSC stock shown
- SMBJ30CA TVS — LCSC part metadata present
- ISO6741 digital isolator — no LCSC SKU/stock shown
- ISO1212 isolated DI receivers — no LCSC SKU/stock shown
- ISOW1044 isolated CAN transceiver — no LCSC SKU/stock shown
- AD7329 ADC — no LCSC SKU/stock shown
- JQC-3F-1C-24VDC relay — no LCSC SKU/stock shown
- USB4105-GF-A USB-C connector — LCSC stock shown as 0
- ULN2003A — LCSC stock shown as 0 for current selected part
- Generic resistors/capacitors/inductor — not assigned to specific LCSC MPNs yet
- Solenoid FET Driver 3.3V blocks — not production BOM-ready as discrete LCSC parts
So the design is not yet LCSC/JLCPCB procurement-ready. Next step should be a sourcing pass to replace/assign LCSC-stocked MPNs for the unavailable ICs, relay, USB connector, passives, inductor, and 1 A USB power switch.
Run sourcing pass
Fix USB switch
Assign passives
Resolve production risks
Check relay options
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Technical Construction File — USB-C WiFi BLE Environmental Node
Status
Draft
Applicable Regulations
- FCC Part 15 (US)
- CE RED (EU)
- ISED (Canada)
- UKCA (UK)
Product Description
Consumer USB-C powered environmental sensor node measuring temperature and humidity with an ESP32-C3 Wi-Fi/BLE module and SHT41 digital sensor.
Wireless Technology Summary
Table
| Module | MPN | Technology | Frequency Band | Notes |
|---|---|---|---|---|
| U1 | ESP32-C3-MINI-1-N4 | Wi-Fi 802.11 b/g/n + BLE 5.x | 2.4 GHz ISM | Use module antenna keepout and integration rules; confirm certification ID for exact module variant. |
Required Documentation Checklist
- Final schematic export
- PCB layout / Gerbers with antenna keepout shown
- BOM with manufacturer part numbers
- ESP32-C3-MINI-1-N4 module datasheet and certification reports
- User manual with RF statements
- Declaration of Conformity
- Accredited lab EMC/RF test reports as required by region
RF Design Notes
- Place U1 antenna at the PCB edge and keep copper, traces, vias, components, and enclosure metal out of the antenna keepout.
- Preserve solid ground reference outside the antenna keepout.
- USB-C cable can act as an unintended radiator; validate conducted/radiated emissions with final enclosure and cable.
Open Items
- Confirm exact module certification IDs for the procurement variant.
- Capture PCB antenna keepout dimensions in layout constraints.
- Add labeling and user manual RF notices before certification testing.
Status
Applicable Regulations
Product Description
Wireless Technology Summary
Required Documentation Checklist
RF Design Notes
Open Items
