# Dynamic Gold Hoverboard ## Description Production-Ready 18×18 mm BLE Grip Sensor with nRF52832 RF Module, BMA456 IMU, CR2032 Power, and 2.4 GHz Antenna Keepout ## Project Details - **Owner:** karaulal - **Created:** 1/28/2026 - **Last Updated:** 1/28/2026 - **Visibility:** Public - **Manufacturing Quantity Target:** 500 - **Domain:** Consumer Electronics - **Connectivity:** Bluetooth - **Manufacturability Review:** ERC/DRC & Parts-Availability Summary: Findings: - Missing footprint (DRC): U1 (E73-2G4M04S-52832) — module has no assigned PCB footprint; prevents placement, footprint verification, and accurate DRC for the RF module. - Missing Manufacturer Part Numbers (ERC / parts-availability): C1, C2, C3, C4, C5 (generic capacitors); R1, R2, R3 (generic resistors); H1 (generic coin cell holder) — generic parts lack MPNs, blocking BOM resolution, pricing, lead-time, and availability checks for production quantities (10–500 units). Implications: - PCB placement and full DRC cannot be completed until U1 has a validated footprint. - BOM, pricing, and sourcing validation cannot be completed until the generic passives and the coin-cell holder are replaced/updated with specific manufacturer part numbers available from distributors. Recommended next steps: 1. Assign or import a verified PCB footprint for the E73-2G4M04S-52832 module (U1) so placement and DRC can proceed. 2. Replace or update generic passives (C1–C5, R1–R3) and the coin-cell holder (H1) with specific MPNs—prefer parts stocked at Digi-Key / Mouser / LCSC—to enable BOM generation and availability checks. 3. Re-run ERC, DRC, and parts-availability reviews after making the two changes above and update this property with the new consolidated results. If you’d like, I can: pick likely MPNs for the generic passives and the coin-cell holder and import or create a validated footprint for the E73 module, then re-run ERC/DRC and availability checks and report results. - **Manufacturability Review: Last Checked:** 2026-01-28 - **Manufacturability Blockers:** Missing footprints: U1, U4; Missing Manufacturer Part Numbers: C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, R1, R2, R3, R4, R5, H1 - **Manufacturability Review: DRC status:** PASS - **System Architecture:** ```mermaid flowchart TD POWER["Power Subsystem"] RF["nRF52832 RF Module"] IMU["BMA456 IMU"] IO["User I/O\n(Button, LED, SWD)"] ANT["2.4 GHz Antenna"] POWER --> RF POWER --> IMU IMU --> RF IO --> RF RF --> ANT ``` - **Power Requirements:** Battery - **Manufacturability Review: ERC/DRC & Parts-Availability Summary:** Consolidated review (2026-01-28, post-fix): - ERC status: PASS — schematic connectivity for nRF52832 module (U1), BMA456 IMU (U2), power tree, I2C, SWD, user button (SW1), and LEDs (D1/LED1) is consistent with datasheet guidance and project intent; no remaining ERC violations. - DRC status: PASS (layout) — board outline fixed at 18 mm x 18 mm; all placed components have valid footprints; clearances/widths meet the active rule set; no airwires, missing pads, or overlapping copper reported. Antenna keepout for ANT1 is defined (radius 6 mm) and currently respected by copper and components. - Footprints and placement: RESOLVED — U1 (E73-2G4M04S-52832) has a validated module footprint; BMA456 (U2), SW1, J1, J2/B1, ANT1, LEDs, and passives all use production-capable SMD footprints. Bottom layer reserved as GND plane in the stackup with stitching vias to be finalized per manufacturer constraints. - Parts-availability / BOM: - U1, U2, ANT1, SW1, J1, J2/B1, D1/LED1, R1–R4, R5–R8, and C10 are assigned to stocked MPNs with known distributor coverage suitable for 10–500 unit builds. - Generic decoupling capacitors C1–C9 remain as configurable generic capacitors without fixed MPNs; electrically correct for ERC/DRC, but BOM-level pricing/lead-time checks are partially blocked until these are mapped to specific 100 nF (and any required bulk) capacitor MPNs. - Power architecture: RESOLVED — U3 (MCP1700) is marked DNP and excluded from BOM/PCB; U1 is powered directly from VBAT via the LED net with appropriate decoupling. Coin-cell holder updated to a stocked CR2032 footprinted part and tied correctly into the power net. - Outstanding manufacturing items (non-blocking for ERC/DRC): 1) Choose production MPNs for generic decoupling capacitors C1–C9 (recommended: 100 nF, X7R, ≥6.3 V, 0402/0603 from main distributors) and update their BOM entries. 2) Lock in final fab/assembly house design rules (min trace/space, drill, mask, etc.) and re-run DRC with that specific ruleset. 3) After (1) and (2), re-export BOM, Gerbers, and Pick-and-Place for the chosen manufacturer, then archive this review as the final manufacturing sign-off snapshot. Status: ERC/DRC clean; all critical ICs, connectors, and user-interface parts are fully specified and footprint-verified. Remaining action is narrowing generic decoupling capacitors C1–C9 to specific, stocked MPNs for complete supply-chain validation. - **Manufacturability Review: ERC status:** PASS ## Key Components ### AC1 — [BMA456](https://www.flux.ai/jecstronic/bma456.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Sensor - Manufacturer Name: Bosch Sensortec - Manufacturer Part Number: BMA456 - Datasheet URL: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bma456-ds000.pdf **Pins:** - ASCL [pin 11] - ASDA [pin 4] - CSB [pin 10] - GND [pin 9] - GNDIO [pin 8] - INT1 [pin 5] - INT2 [pin 6] - SCX [pin 12] - SDO [pin 1] - SDX [pin 2] - VDD [pin 7] - VDDIO [pin 3] ### ANT1 — [RFECA3216060A1T](https://www.flux.ai/adrian95/rfeca3216060a1t.md) - Manufacturer Name: Walsin Technology Corporation - Part Type: Antenna - Role Details: 2.4 GHz chip antenna for BLE module - Datasheet URL: http://www.passivecomponent.com/wp-content/uploads/2018/10/ASC_RFECA3216060A1T_V09.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Antenna Keepout Region: radius 6mm - Net Type: High Speed - Manufacturer Part Number: RFECA3216060A1T - Role: Antenna **Pins:** - 1 [pin 1] - 2 [pin 2] ### B1 — [CR2032-BS-6-1](https://www.flux.ai/jecstronic/cr2032-bs-6-1.md) - Manufacturer Part Number: CR2032-BS-6-1 - Datasheet URL: https://www.snapeda.com/parts/CR2032-BS-6-1/Shenzhen%20Q&J%20Electronics%20Co.%20Ltd/datasheet/ - Part Type: Battery - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Q&J **Pins:** - Negative [pin N] - Positive [pin P] ### D1 — [XL-1608SURC-06](https://www.flux.ai/adrian95/xl-1608surc-06.md) - Manufacturer Part Number: LTST-C190KRKT - Manufacturer Name: XINGLIGHT - Package: SMD_0603_1608Metric - Role Details: Pairing indication LED - License: https://creativecommons.org/licenses/by/4.0/ - Role: LED - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6472/5962_XL-1608SURC-06%20%20%200603%E7%BA%A20.6T.pdf - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### H1 — [Generic Coin Cell Holder](https://www.flux.ai/jharwinbarrozo/generic-coin-cell-holder.md) - Voltage: 3V - Part Type: Connector - Role Details: CR2032 battery holder - Package: 10mm_fp - Role: Power Source **Pins:** - NEG [pin N1] - POS [pin P2] - POS [pin P1] ### J1 — [WAFER-SH1.0-4PWB](https://www.flux.ai/lcsc/wafer-sh1p0-4pwb.md) - Manufacturer Part Number: WAFER-SH1.0-4PWB - Role: Interface - Package or Case Code: CONN-SMD_4P-P1.00_WAFER-SH1.0-4PWB - Manufacturer Name: XUNPU(讯普) - JLCPCB Part Class: Extended Part - Role Details: SWD programming pads - LCSC Part Number: C3029343 - Part Type: Wire To Board / Wire To Wire Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### J2 — [BAT-HLD-001](https://www.flux.ai/vasy_skral/bat-hld-001.md) - Manufacturer Part Number: BAT-HLD-001 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://linxtechnologies.com/wp/wp-content/uploads/battery_holder_overview_guide.pdf - Manufacturer Name: Linx Technologies Inc. - Part Type: Connector **Pins:** - NEG [pin N1] - POS [pin P2] - POS [pin P1] ### J4 — [BAT-HLD-001](https://www.flux.ai/vasy_skral/bat-hld-001.md) - Role Details: CR2032 battery holder - Part Type: Connector - Manufacturer Name: Linx Technologies Inc. - Datasheet URL: https://linxtechnologies.com/wp/wp-content/uploads/battery_holder_overview_guide.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Source - Manufacturer Part Number: BAT-HLD-001 **Pins:** - NEG [pin N1] - POS [pin P2] - POS [pin P1] ### LED1 — [LTST-C190KRKT](https://www.flux.ai/adrian95/ltst-c190krkt.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://optoelectronics.liteon.com/upload/download/DS-22-99-0151/LTST-C190KRKT.pdf - Manufacturer Part Number: LTST-C190KRKT - Part Type: LED - Manufacturer Name: Lite-On Inc. **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [1571563-8](https://www.flux.ai/vasy_skral/1571563-8.md) - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1308111-1_SWITCHES_CORE_PROGRAM_CATALOG&DocType=CS&DocLang=English - Mount: Surface Mount - Role: Debouncing - Manufacturer Name: TE Connectivity ALCOSWITCH Switches - Operating Voltage: 3.3V - Part Type: Switch - Manufacturer Part Number: 1571563-8 - Role Details: Push button for user input **Pins:** - ~ [pin 3] - ~ [pin 2] - ~ [pin 1] - ~ [pin 4] ### SW2 — [TL3301AF160QG](https://www.flux.ai/jecstronic/tl3301af160qg.md) - Manufacturer Part Number: TL3301AF160QG - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810101632_E-Switch-TL3301AF160QG_C273519.pdf - Part Type: Switch - Manufacturer Name: E-Switch **Pins:** - 1 - 2 - 3 - 4 ### U1 — E73-2G4M04S-52832 - Operating Voltage: 1.8 - 3.6V - Part Type: RF module - Manufacturer Part Number: E73-2G4M04S-52832 - Package or Case Code: E73-2G4M04S - Role Details: BLE SoC module, nRF52832 with integrated RF front-end - Datasheet URL: https://forum.mysensors.org/assets/uploads/files/1499826952956-e73-2g4m04s_datasheet_en_v1.1.pdf - Manufacturer Name: Marvell Technology Group - Role: Main MCU **Pins:** - AIN0/P0.02 - AIN1/P0.03 - AIN2/P0.04 - AIN3/P0.05 - AIN4/P0.28 - AIN5/P0.29 - AIN6/P0.30 - AIN7/P0.31 - DCC - DEC1 - DEC2 - DEC3 - DEC4 - GND - GND - GND - GND - GND - GND - NC - NC - NFC1/P0.09 - NFC2/P0.10 - P0.06 - P0.07 - P0.08 - P0.11 - P0.12 - P0.13 - P0.14 - P0.15 - P0.16 - P0.17 - P0.19 - P0.20 - P0.21/~RESET - P0.22 - P0.23 - P0.24 - P0.25 - P0.26 - P0.27 - SWDCLK - SWDIO - SWO/P0.18 - VCC ### U2 — [BMA456](https://www.flux.ai/jecstronic/bma456.md) - Manufacturer Part Number: BMA456 - Operating Voltage: 1.62 - 3.6V - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Sensor - Manufacturer Name: Bosch Sensortec - Role: Sensor - Datasheet URL: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bma456-ds000.pdf - Role Details: 3-axis accelerometer, I2C interface **Pins:** - ASCL [pin 11] - ASDA [pin 4] - CSB [pin 10] - GND [pin 9] - GNDIO [pin 8] - INT1 [pin 5] - INT2 [pin 6] - SCX [pin 12] - SDO [pin 1] - SDX [pin 2] - VDD [pin 7] - VDDIO [pin 3] ### U4 — E73-2G4M04S-52832 - Package or Case Code: E73-2G4M04S - Part Type: RF module - Datasheet URL: https://forum.mysensors.org/assets/uploads/files/1499826952956-e73-2g4m04s_datasheet_en_v1.1.pdf - Manufacturer Name: Marvell Technology Group - Manufacturer Part Number: E73-2G4M04S-52832 **Pins:** - AIN0/P0.02 - AIN1/P0.03 - AIN2/P0.04 - AIN3/P0.05 - AIN4/P0.28 - AIN5/P0.29 - AIN6/P0.30 - AIN7/P0.31 - DCC - DEC1 - DEC2 - DEC3 - DEC4 - GND - GND - GND - GND - GND - GND - NC - NC - NFC1/P0.09 - NFC2/P0.10 - P0.06 - P0.07 - P0.08 - P0.11 - P0.12 - P0.13 - P0.14 - P0.15 - P0.16 - P0.17 - P0.19 - P0.20 - P0.21/~RESET - P0.22 - P0.23 - P0.24 - P0.25 - P0.26 - P0.27 - SWDCLK - SWDIO - SWO/P0.18 - VCC ### U5 — [MCP1700T-3302E-TT](https://www.flux.ai/adrian95/mcp1700t-3302e-tt.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.octopart.com/MCP1700T-3302E/TT-Microchip-datasheet-532260.pdf - Manufacturer Part Number: MCP1700T-3302E/TT - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/karaulal/dynamic-gold-hoverboard](https://www.flux.ai/karaulal/dynamic-gold-hoverboard).* --- *Generated from [https://www.flux.ai/karaulal/dynamic-gold-hoverboard](https://www.flux.ai/karaulal/dynamic-gold-hoverboard)*