# XIAO ESP32S3 Robot Carrier ## Description Compact 60×50mm 2-layer carrier PCB for a flat differential-drive robot using a hand-soldered Seeed Studio XIAO ESP32S3 and Eurocircuits-assembled DRV8833 motor driver. ## Project Details - **Owner:** ishish - **Created:** 5/3/2026 - **Last Updated:** 5/3/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### J1 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector - Role Details: Left motor output: pin 1 AO1, pin 2 AO2; through-hole hand/secondary operation. - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Motor Output Connector - Exclude from Pick & Place: true **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Exclude from Pick & Place: true - Role Details: Right motor output: pin 1 BO1, pin 2 BO2; through-hole hand/secondary operation. - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - Part Type: Connector - Role: Motor Output Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Name: JST Sales America **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J3 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Exclude from Pick & Place: true - Role Details: LiPo input: pin 1 VBAT/BAT+, pin 2 GND; through-hole hand/secondary operation. Route to XIAO BAT+ pad manually if available; current library symbol exposes only 5V. - Part Type: Connector - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America - Role: Battery Input Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J4 — [JST_SH_BM04_1x04_P1.00mm_Vertical](https://www.flux.ai/jecstronic/jstshbm041x04p1p00mmvertical~g1u.md) - Manufacturer Part Number: BM04B-SRSS-TB(LF)(SN) - Manufacturer Name: JST Sales America - Role Details: Left encoder: pin 1 3V3, pin 2 GND, pin 3 D4 encoder signal, pin 4 reserved/NC for optional quadrature. - Role: Encoder Connector - Part Type: Connector - Exclude from Pick & Place: true - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] ### J5 — [JST_SH_BM04_1x04_P1.00mm_Vertical](https://www.flux.ai/jecstronic/jstshbm041x04p1p00mmvertical~g1u.md) - Role: Encoder Connector - Manufacturer Part Number: BM04B-SRSS-TB(LF)(SN) - Manufacturer Name: JST Sales America - Exclude from Pick & Place: true - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role Details: Right encoder: pin 1 3V3, pin 2 GND, pin 3 D5 encoder signal, pin 4 reserved/NC for optional quadrature. **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] ### J6 — [TSW-105-07-G-S](https://www.flux.ai/adrian95/tsw-105-07-g-s~klw.md) - Manufacturer Name: Samtec - Datasheet: https://suddendocs.samtec.com/productspecs/tsw-sxx.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Expansion Header - Exclude from Pick & Place: true - Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf - Role Details: Reserved magnet lift access: D6, D7, D8, 3V3, GND. - Manufacturer Part Number: TSW-105-07-G-S - Part Type: Connector **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] ### LED1 — [SML-D13FWT86C](https://www.flux.ai/jecstronic/sml-d13fwt86c~i2q.md) - Manufacturer Part Number: SML-D13FWT86C - Role: Indicator - Manufacturer Name: Rohm Semiconductor - Part Type: LED - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/opto/led/chip_mono/sml-d13fwt86(c)-e.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Optional D9 status LED; omit or DNP if not needed. **Pins:** - A [pin 2] - K [pin 1] ### U1 — [Seeed Studio XIAO ESP32S3](https://www.flux.ai/seeedstudio/seeed-studio-xiao-esp32s3~jt.md) - Manufacturer Part Number: 113991114 - Product Info Url: https://wiki.seeedstudio.com/xiao_esp32s3_getting_started/ - Role: Microcontroller module - Datasheet URL: https://files.seeedstudio.com/wiki/SeeedStudio-XIAO-ESP32S3/res/esp32-s3_datasheet.pdf - Role Details: Hand-soldered Seeed Studio XIAO ESP32S3; place at board edge for USB-C access and antenna clearance; not included in Eurocircuits SMT assembly. Battery should use BAT pads if exposed in the footprint; this library symbol only exposes the 5V pad. - Part Type: Microcontroller - Manufacturer Name: Seeed Studio - Purchase Url: https://www.seeedstudio.com/XIAO-ESP32S3-p-5627.html - Exclude from Pick & Place: true **Pins:** - 3V3 [pin 12] - 5V [pin 14] - D10_A10_MOSI_GPIO9_TOUCH9 [pin 11] - D7_RX_GPIO44 [pin 8] - D8_A8_SCK_GPIO7_TOUCH7 [pin 9] - D9_A9_MISO_GPIO8_TOUCH8 [pin 10] - GND [pin 13] - GPIO43_TX_D6 [pin 7] - TOUCH1_GPIO1_A0_D0 [pin 1] - TOUCH2_GPIO2_A1_D1 [pin 2] - TOUCH3_GPIO3_A2_D2 [pin 3] - TOUCH4_GPIO4_A3_D3 [pin 4] - TOUCH5_GPIO5_SDA_A4_D4 [pin 5] - TOUCH6_GPIO6_SCL_A5_D5 [pin 6] ### U2 — [DRV8833CPWPR](https://www.flux.ai/adrian95/drv8833cpwpr~294.md) - Manufacturer Part Number: DRV8833CPWPR - Datasheet URL: http://www.ti.com/lit/gpn/drv8833c - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Package or Case Code: SOP65P640X120-17N - Part Type: Integrated Circuit - Role: Motor Driver - Role Details: Dual H-bridge for left/right motors; VM presently driven from XIAO 3V3 per original pin assignment, valid for DRV8833C 2.7V–10.8V but motor torque/current are limited by XIAO 3V3 regulator budget. AISEN/BISEN tied to GND to omit external current regulation/sense resistors; 10uF VM bulk and VINT capacitor included. **Pins:** - AIN1 [pin 16] - AIN2 [pin 15] - AISEN [pin 3] - AOUT1 [pin 2] - AOUT2 [pin 4] - BIN1 [pin 9] - BIN2 [pin 10] - BISEN [pin 6] - BOUT1 [pin 7] - BOUT2 [pin 5] - GND_1 [pin 13] - GND_2 [pin 17] - NC [pin 11] - NFAULT [pin 8] - NSLEEP [pin 1] - VINT [pin 14] - VM [pin 12] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ishish/xiao-esp32s3-robot-carrier~ob](https://www.flux.ai/ishish/xiao-esp32s3-robot-carrier~ob).* --- *Generated from [https://www.flux.ai/ishish/xiao-esp32s3-robot-carrier~ob](https://www.flux.ai/ishish/xiao-esp32s3-robot-carrier~ob)*