# draft PCB 1 ## Description ESP32 Wrist–Hand Orthosis Controller v1.0 ## Project Details - **Owner:** vaishakkr - **Created:** 10/26/2025 - **Last Updated:** 10/29/2025 - **Visibility:** Public - **Layer Count:** 2 - **Bottom Copper Plane Net:** GND - **Board Width:** 70mm - **System Architecture:** ```mermaid flowchart LR PS["Power Subsystem"] ESP["ESP32 DevKitC"] Srv["Servo Interfaces"] I2C["I2C Sensors"] ECG["ECG Input"] Flex["Flex Sensors"] FSR["FSR Sensors"] TP["Test Pads"] PS --> ESP ESP --> Srv ESP --> I2C ESP --> ECG ESP --> Flex ESP --> FSR ESP --> TP ``` - **Board Height:** 60mm - **Stars:** 1 ## Key Components ### CN1 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Manufacturer Name: JST - LCSC Part Number: C131337 - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - Part Type: Wire To Board / Wire To Wire Connector - Role: Connector - Role Details: Flex sensor input header - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Gender: Male - Connector Positions: 2 - Connector Pitch: 2mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### CN2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Positions: 2 - Connector Gender: Male - Connector Pitch: 2mm - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Role: Connector - Manufacturer Name: JST - LCSC Part Number: C131337 - Role Details: Flex sensor input header - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S **Pins:** - 1 [pin 1] - 2 [pin 2] ### CN3 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Manufacturer Name: JST - LCSC Part Number: C131337 - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Role Details: Flex sensor input header - Connector Pitch: 2mm - Connector Positions: 2 - Connector Gender: Male - Role: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### CN4 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Manufacturer Name: JST - LCSC Part Number: C131337 - Role Details: Flex sensor input header - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Pitch: 2mm - Connector Positions: 2 - Role: Connector - Connector Gender: Male **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Role: Connector - Part Type: Connector - Role Details: 5V power input 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 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J10 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - License: https://creativecommons.org/licenses/by/4.0/ - 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: Connector - Role Details: Flex sensor input header **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J11 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - LCSC Part Number: C131337 - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - Manufacturer Name: JST - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Role: Connector - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Gender: Male - Connector Positions: 2 - Connector Pitch: 2mm - Role Details: FSR sensor input header - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11, J12, J13, J14, J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Pitch: 2mm - Connector Gender: Male - Connector Positions: 2 - Role Details: FSR sensor input header - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Manufacturer Name: JST - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Role: Connector - LCSC Part Number: C131337 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11, J12, J13, J14, J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Gender: Male - Connector Positions: 2 - Connector Pitch: 2mm - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Manufacturer Name: JST - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Role Details: FSR sensor input header - Role: Connector - LCSC Part Number: C131337 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11, J12, J13, J14, J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - LCSC Part Number: C131337 - Manufacturer Name: JST - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Role Details: FSR sensor input header - Part Type: Wire To Board / Wire To Wire Connector - Connector Gender: Male - Connector Positions: 2 - Connector Pitch: 2mm - Role: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11, J12, J13, J14, J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector - Role: Connector - Role Details: FSR sensor input header - Connector Positions: 2 - Connector Gender: Male - Connector Pitch: 2mm - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - LCSC Part Number: C131337 - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Manufacturer Name: JST **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11, J12, J13, J14, J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Manufacturer Name: JST - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - LCSC Part Number: C131337 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Pitch: 2mm - Connector Gender: Male - Connector Positions: 2 - Role: Connector - Part Type: Wire To Board / Wire To Wire Connector - Role Details: FSR sensor input header - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) **Pins:** - 1 [pin 1] - 2 [pin 2] ### J12 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Role Details: FSR sensor input header - Connector Pitch: 2mm - Connector Positions: 2 - Connector Gender: Male - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - LCSC Part Number: C131337 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - Role: Connector - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### J13 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Role Details: FSR sensor input header - Part Type: Wire To Board / Wire To Wire Connector - Connector Gender: Male - Connector Positions: 2 - Connector Pitch: 2mm - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - LCSC Part Number: C131337 - Package or Case Code: CONN-TH_B2B-PH-K-S - JLCPCB Part Class: Extended Part - Role: Connector - Manufacturer Name: JST **Pins:** - 1 [pin 1] - 2 [pin 2] ### J14 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - LCSC Part Number: C131337 - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - Manufacturer Name: JST - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Connector Type: Wire To Board Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Positions: 2 - Connector Gender: Male - Connector Pitch: 2mm - Role Details: FSR sensor input header - Role: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J15 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Rows: 1 - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Type: Wire To Board Connector - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B2B-PH-K-S - LCSC Part Number: C131337 - Manufacturer Name: JST - Role: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector - Role Details: FSR sensor input header - Connector Pitch: 2mm - Connector Positions: 2 - Connector Gender: Male **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Part Type: Connector - Manufacturer Part Number: TSW-103-07-G-S - Manufacturer Name: Samtec Inc. - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf - Role Details: Servo header **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J3 — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - Role Details: Servo header - Manufacturer Part Number: TSW-103-07-G-S - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf - Manufacturer Name: Samtec Inc. **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J4 — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - Manufacturer Name: Samtec Inc. - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf - Manufacturer Part Number: TSW-103-07-G-S - Role Details: Servo header - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J5 — [61300411121](https://www.flux.ai/adrian95/61300411121~pw9.md) - Role Details: I2C header (VCC, SDA, SCL, GND) - Part Type: Connector - Manufacturer Name: Wurth Elektronik - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300411121.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Package or Case Code: HDRV4W95P0X254_1X4_1016X254X854P - Manufacturer Part Number: 61300411121 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J5 — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TSW-103-07-G-S - Manufacturer Name: Samtec Inc. - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J6 — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - Manufacturer Name: Samtec Inc. - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Part Type: Connector - Manufacturer Part Number: TSW-103-07-G-S - Role Details: ECG header **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J7 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Role: Connector - Role Details: Flex sensor input header - Part Type: Connector - 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) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J8 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Role Details: Flex sensor input header - Part Type: 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 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America - Role: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J9 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Manufacturer Name: JST Sales America - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - 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: Flex sensor input header **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### LED1 — [KPT-1608SURCK](https://www.flux.ai/adrian95/kpt-1608surck~dsz.md) - Datasheet URL: https://www.kingbright.com/attachments/file/psearch/000/00/20160808bak/KPT-1608SURCK(Ver.22A).pdf - Role: LED - Manufacturer Name: Kingbright - Part Type: LED - Manufacturer Part Number: KPT-1608SURCK - Role Details: Power indicator for 5V rail - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [KPT-1608SURCK](https://www.flux.ai/adrian95/kpt-1608surck~dsz.md) - Datasheet URL: https://www.kingbright.com/attachments/file/psearch/000/00/20160808bak/KPT-1608SURCK(Ver.22A).pdf - Role Details: Power indicator for 3.3V rail - Manufacturer Name: Kingbright - Role: LED - Part Type: LED - Manufacturer Part Number: KPT-1608SURCK - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [L101011MS02Q](https://www.flux.ai/adrian95/l101011ms02q~ck2.md) - Manufacturer Part Number: L101011MS02Q - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/1423/l.pdf - Role Details: Board power slide switch - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: C&K - Role: Switch **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-DEVKITC-32UE](https://www.flux.ai/adrian95/esp32-devkitc-32ue~ba.md) - Manufacturer Part Number: ESP32-DEVKITC-32UE - Role: Microcontroller - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Part Type: Development Board - Role Details: Main MCU - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 3V3 [pin 1] - 5V [pin 19] - CLK [pin 38] - CMD [pin 18] - D0 [pin 37] - D1 [pin 36] - D2 [pin 16] - D3 [pin 17] - EN [pin 2] - GND [pin 20] - GND [pin 26] - GND [pin 14] - GPIO0 [pin 33] - GPIO12 [pin 13] - GPIO13 [pin 15] - GPIO14 [pin 12] - GPIO15 [pin 35] - GPIO16 [pin 31] - GPIO17 [pin 30] - GPIO18 [pin 28] - GPIO19 [pin 27] - GPIO2 [pin 34] - GPIO21 [pin 25] - GPIO22 [pin 22] - GPIO23 [pin 21] - GPIO25 [pin 9] - GPIO26 [pin 10] - GPIO27 [pin 11] - GPIO32 [pin 7] - GPIO33 [pin 8] - GPIO34 [pin 5] - GPIO35 [pin 6] - GPIO4 [pin 32] - GPIO5 [pin 29] - RX [pin 24] - TX [pin 23] - VN [pin 4] - VP [pin 3] ### U2 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Manufacturer Name: AMS - Role Details: 3.3V LDO regulator for ESP32 - Part Type: Integrated Circuit - Role: Power Conversion - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric - Manufacturer Part Number: AMS1117-3.3 **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vaishakkr/draft-pcb-1~4t](https://www.flux.ai/vaishakkr/draft-pcb-1~4t).* --- *Generated from [https://www.flux.ai/vaishakkr/draft-pcb-1~4t](https://www.flux.ai/vaishakkr/draft-pcb-1~4t)*