# Stryke Left Hand Sensor Board Battery Power ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** rodrigotutoring - **Created:** 4/4/2026 - **Last Updated:** 4/6/2026 - **Visibility:** Public ## Key Components ### J1 — [S2B-PH-SM4-TB(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-sm4-tblfsn~b96.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Connector Type: JST-PH Horizontal SMT - Manufacturer Part Number: S2B-PH-SM4-TB(LF)(SN) - Role: Battery Connector - Role Details: Horizontal JST-PH 2-pin LiPo battery connector. Mating side: JST PHR-2 housing or standard JST-PH 2-pin LiPo battery lead; Pin 1 = VBAT+, Pin 2 = GND. - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - Connector Pitch: 2.0mm - License: https://creativecommons.org/licenses/by/4.0/ - Package: Horizontal SMD - Connector Positions: 2 **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [Seeed Studio XIAO ESP32C6](https://www.flux.ai/seeedstudio/seeed-studio-xiao-esp32c6~3q.md) - Role: Controller - Manufacturer Part Number: 113991254 - Datasheet URL: https://files.seeedstudio.com/wiki/SeeedStudio-XIAO-ESP32C6/XIAO-ESP32-C6_v1.0_SCH_PDF_24028.pdf - Implementation Details: Unused XIAO ESP32-C6 pins D0/GPIO0, D1/GPIO1, D4/GPIO22, D5/GPIO23, D6/TX, D7/RX, D8/SCK, D9/MISO, D10/MOSI, BOOT/GPIO9, GPIO4, and GPIO5 are intentionally unused in this project. Per XIAO ESP32-C6 guidance, avoid using GPIO4, GPIO5, GPIO8, GPIO9, and GPIO15. These intentionally unused module pins should be treated as schematic no-connects for ERC and left unconnected. - wiki : https://wiki.seeedstudio.com/xiao_esp32c6_getting_started/ - Purchase Url: https://www.seeedstudio.com/Seeed-Studio-XIAO-ESP32C6-p-5884.html - Package: XIAO-ESP32-C6-SMD - Role Details: Main processor and 3.3V domain host for sensors and interfaces **Pins:** - 3V3 [pin 12] - 3V3_1 [pin 18] - 5V [pin 14] - BAT - [pin 21] - BAT + [pin 20] - BOOT_GPIO9 [pin 22] - D10_MOSI_GPIO18_SDIO-CMD [pin 11] - D7_RX_GPIO17 [pin 8] - D8_SCK_GPIO19_SDIO-CLK [pin 9] - D9_MISO_GPIO20_SDIO-DATA0 [pin 10] - EN [pin 24] - GND [pin 13] - GND_1 [pin 16] - GND_PAD [pin 19] - GPIO_TX_D6 [pin 7] - LP-GPIO0_GPIO0_0_D0 [pin 1] - LP-GPIO1_GPIO1_A1_D1 [pin 2] - LP-GPIO2_GPIO2_A2_D2 [pin 3] - LP-I2C-SCL_LB-GPIO7_GPIO7_MTDO [pin 15] - LP-I2C-SDA_LP-GPIO6_GPIO6_A6_MTCK [pin 17] - MTDI_A5_GPIO5_LB-GPIO5_LP-UART-TXD [pin 25] - MTMS_A4_GPIO4_LP-GPIO4_LP-UART-RXD [pin 23] - SDIO-DATA1_GPIO21_D3 [pin 4] - SDIO-DATA2_GPIO22_SDA_D4 [pin 5] - SDIO-DATA3_GPIO23_SCL_D5 [pin 6] ### U2 — [MPU-6500](https://www.flux.ai/vasyl/mpu-6500~3mm.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MPU-6500 - Role: Sensor - Role Details: 6-axis IMU on 1.8V domain - Manufacturer Name: TDK InvenSense - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2020/06/PS-MPU-6500A-01-v1.3.pdf - Package: QFN-24 - Implementation Details: MPU-6500 unused pin handling per datasheet: pins 1-6 and 14-17 are NC and must not connect; AUX_CL and AUX_DA are unused in this design and should be marked no-connect; RESV19 is reserved and must not connect; RESV20 must connect to GND; FSYNC is tied to GND when unused; REGOUT requires only its local bypass capacitor. - Part Type: IMU **Pins:** - 25 [pin 25] - AUX_CL [pin 7] - AUX_DA [pin 21] - FSYNC [pin 11] - GND [pin 18] - INT [pin 12] - NC [pin 15] - NC [pin 5] - NC [pin 4] - NC [pin 6] - NC [pin 16] - NC [pin 2] - NC [pin 14] - NC [pin 3] - NC [pin 17] - NC [pin 1] - nCS [pin 22] - REGOUT [pin 10] - RESV [pin 19] - RESV [pin 20] - SCL/SCLK [pin 23] - SDA/SDI [pin 24] - SDO/ADO [pin 9] - VDD [pin 13] - VDDIO [pin 8] ### U3 — [MAX30102EFD+T](https://www.flux.ai/vasy_skral/max30102efdplust~r7h.md) - Part Type: Integrated Circuit - Symbol Style: Parametric - Role: Sensor - Implementation Details: MAX30102 unused pin handling per datasheet: pins 1, 5, 6, 7, 8, and 14 are N.C. and should remain unconnected. In this design, symbol pins R_DRV and IR_DRV correspond to unused LED driver outputs and should be treated as intentional no-connects for ERC. INT is open-drain and needs a pull-up only when used. - Manufacturer Name: Maxim Integrated - Manufacturer Part Number: MAX30102EFD+T - Package: OLGA-14 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX30102.pdf - Role Details: Optical pulse oximeter and heart-rate sensor with LED supply decoupling **Pins:** - ~INT [pin 13] - GND [pin 12] - IR_DRV [pin 6] - NC [pin 8] - NC [pin 14] - NC [pin 1] - NC [pin 7] - PGND [pin 4] - R_DRV [pin 5] - SCL [pin 2] - SDA [pin 3] - VDD [pin 11] - VLED+ [pin 10] - VLED+ [pin 9] ### U4 — [AP2112K-1.8TRG1](https://www.flux.ai/adrian95/ap2112k-18trg1~xct.md) - Package: SOT-23-5 - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Manufacturer Part Number: AP2112K-1.8TRG1 - Role Details: 1.8V LDO supplying low-voltage sensor domain - License: https://creativecommons.org/licenses/by/4.0/ - Role: Regulator - Manufacturer Name: Diodes Incorporated **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] ### U5 — [PCA9306DCUR](https://www.flux.ai/jecstronic/pca9306dcur~1b6.md) - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/ds/symlink/pca9306.pdf - Manufacturer Part Number: PCA9306DCUR - Package: VSSOP-8 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Level Translator - Role Details: Bidirectional I2C level translator between MCU and 1.8V sensors **Pins:** - EN [pin 8] - GND [pin 1] - SCL1 [pin 3] - SCL2 [pin 6] - SDA1 [pin 4] - SDA2 [pin 5] - VREF1 [pin 2] - VREF2 [pin 7] ### U6 — [MCP73871-2CCI/ML](https://www.flux.ai/adrian95/mcp73871-2cciml~xz9.md) - Role: Battery Charger - Manufacturer Part Number: MCP73871-2CCI/ML - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/MCP73871-Data-Sheet-20002090E.pdf - Package: QFN - Role Details: Single-cell LiPo charger with power-path management between USB input, battery, and system rail - License: https://creativecommons.org/licenses/by/4.0/ - Implementation Details: MCP73871 configured for single-cell LiPo charging with power-path management. PROG1 uses 2k for approximately 500mA fast charge based on I_REG = 1000V / R_PROG1(kΩ). IN bypassed with 10uF + 100nF, VBAT bypassed with 10uF, OUT/system bypassed with 10uF. - Manufacturer Name: Microchip Technology **Pins:** - ~PG [pin 6] - ~TE [pin 9] - CE [pin 17] - EP [pin 21] - IN_1 [pin 18] - IN_2 [pin 19] - OUT_1 [pin 1] - OUT_2 [pin 20] - PROG1 [pin 13] - PROG2 [pin 4] - PROG3 [pin 12] - SEL [pin 3] - STAT1/~LBO [pin 8] - STAT2 [pin 7] - THERM [pin 5] - VBAT_1 [pin 14] - VBAT_2 [pin 15] - VBAT_SENSE [pin 16] - VPCC [pin 2] - VSS_1 [pin 10] - VSS_2 [pin 11] ### U7 — [DW01A](https://www.flux.ai/kicad-part-library/dw01a~5d.md) - Role: Battery Protection - Implementation Details: DW01A protection controller used with FS8205A. VCC is fed from PACK_PLUS through a series resistor and locally bypassed. TD uses 100nF timing capacitor. CS uses 1k between PACK_MINUS and CELL_MINUS per typical application. - Package or Case Code: SOT-23-6 - Role Details: Overcharge, overdischarge, and overcurrent protection controller for 1-cell LiPo - Manufacturer Part Number: DW01A - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: https://hmsemi.com/downfile/DW01A.PDF - Package: SOT-23-6 **Pins:** - CS [pin 2] - GND [pin 6] - OC [pin 3] - OD [pin 1] - TD [pin 4] - VCC [pin 5] ### U8 — FS8205A - Package: SOT-23-6 - Role Details: Dual MOSFET pair used with DW01A to disconnect battery during fault conditions - Datasheet URL: https://datasheet.lcsc.com/lcsc/2108132230_TECH-PUBLIC-FS8205A_C2830320.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Battery Protection - Part Type: Integrated Circuit - Implementation Details: FS8205A dual NMOS used as the battery protection switch element in the battery negative path under DW01A control. - Manufacturer Name: TECH PUBLIC - Manufacturer Part Number: FS8205A **Pins:** - GND [pin 3] - IN1 [pin 2] - IN2 [pin 5] - SINK [pin 4] - SOURCE [pin 6] - VCC [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/rodrigotutoring/stryke-left-hand-sensor-board-battery-power~00](https://www.flux.ai/rodrigotutoring/stryke-left-hand-sensor-board-battery-power~00).* --- *Generated from [https://www.flux.ai/rodrigotutoring/stryke-left-hand-sensor-board-battery-power~00](https://www.flux.ai/rodrigotutoring/stryke-left-hand-sensor-board-battery-power~00)*