# PCB E-dolly ## Description 36 V Contactor Coil Driver with Safe Kill Loop, 3.3 V Logic, SPI IMU, 24 V/5 A Buck, and ESP32 IO12-Driven E-Stop MOSFET via Series PH2.0 Safety Connectors #E_STOP #MOSFET #PH2.0 #SAFETY ## Project Details - **Owner:** raphiki66 - **Created:** 2/8/2026 - **Last Updated:** 2/8/2026 - **Visibility:** Public - **Project Description:** 36 V contactor coil driver with safe kill input loop interface and 3.3 V logic control. - **R9 Role:** Base-emitter pull-down for Q1 ensuring coil off when IC1 output is high-Z or low. - **Contactor Coil Driver Topology:** Low-side NPN transistor (Q1 MMBT5551) with flyback diode (D2 UF4007) across coil between Net 1 (36 V) and Net 14 (Q1 collector). - **R8 Role:** Base/gate series resistor limiting drive from IC1 to Q1 (switching control). - **SAFE_IN Filter Components:** R3 (10k), C4 (100nF) to GND provide RC filtering; R4 (1k) provides series input protection and loop termination from CN3. - **CN3 Role:** 2-pin connector for external safe kill loop input (Safe Raw on pin 1, GND on pin 2). - **System Architecture:** ```mermaid flowchart TD ESP32["ESP32\n(IO12)"] --> E_STOP_IN1["PH2.0 Conn1\nE_STOP_IN1"] E_STOP_IN1 --> E_STOP_IN2["PH2.0 Conn2\nE_STOP_IN2"] E_STOP_IN2 --> Gate["MOSFET Gate\n(E_STOP_DRIVE)"] Gate -->|10kΩ Pull-up\n3.3V Rail| PU["3.3V Rail"] subgraph Power VB36["36V Bus"] --> Coil["Contactor Coil"] Coil --> Drain["MOSFET Drain\n(E_STOP_PATH)"] Drain --> Source["MOSFET Source"] Source --> GND["System Ground"] end ``` - **SAFE_IN Net Name:** Net 11 - **Domain:** Automotive - **Q1 Part Type:** Transistor - **Buck Converter Role (U1 MP2565):** Steps 36 V down to 3.3 V (Net 7) for logic and control electronics. - **Coil Flyback Strategy:** Standard flyback / freewheeling diode D2 from 36 V supply to transistor collector (Net 14) to clamp inductive kick on turn-off. - **Power Requirements:** Battery - **Logic Function (IC1):** Schmitt Trigger Inverter - **Net 1 Role:** High-side 36 V supply for contactor coil and buck converter input. - **Operating Voltage:** 36V - **Net 7 Role:** 3.3 V logic rail powering ESP32 and SN74LVC1G14 Schmitt inverter. - **IC1 Part Type:** Integrated Circuit - **D2 Part Type:** Diode - **SAFE_IN Role:** Safe kill input loop sensed via R3/R4 and filtered by C4 into Schmitt-trigger IC1. ## Key Components ### CN1 — [XT30UPB-M](https://www.flux.ai/lcsc/xt30upb-m.md) - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304241822_Changzhou-Amass-Elec-XT30UPB-M_C428721.pdf - Part Type: Power Connectors - Package or Case Code: CONN-TH_XT30UPB-M - LCSC Part Number: C428721 - Manufacturer Name: AMASS(艾迈斯) - Manufacturer Part Number: XT30UPB-M - Product Info Url: https://lcsc.com/product-detail/Power-Connectors_Changzhou-Amass-Elec-XT30UPB-M_C428721.html - Voltage Rating: 500V - Current Rating: 15A - Connector Gender: Male **Pins:** - - [pin 1] - + [pin 2] ### CN2 — [XT30UPB-M](https://www.flux.ai/lcsc/xt30upb-m.md) - Package or Case Code: CONN-TH_XT30UPB-M - LCSC Part Number: C428721 - Manufacturer Name: AMASS(艾迈斯) - Manufacturer Part Number: XT30UPB-M - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304241822_Changzhou-Amass-Elec-XT30UPB-M_C428721.pdf - Part Type: Power Connectors - Voltage Rating: 500V - Current Rating: 15A - Connector Gender: Male - Product Info Url: https://lcsc.com/product-detail/Power-Connectors_Changzhou-Amass-Elec-XT30UPB-M_C428721.html **Pins:** - - [pin 1] - + [pin 2] ### CN3 — [B4B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b4b-ph-k-slfsn.md) - Connector Positions: 4 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B4B-PH-K-S-LF-SN_C131334.pdf - Package or Case Code: CONN-TH_B4B-PH-K-S - JLCPCB Part Class: Extended Part - Connector Pitch: 2mm - Manufacturer Name: JST - Connector Rows: 1 - Connector Type: Board to Wire - Manufacturer Part Number: B4B-PH-K-S(LF)(SN) - Connector Gender: Female - LCSC Part Number: C131334 - Part Type: Wire To Board / Wire To Wire Connector - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B4B-PH-K-S-LF-SN_B4B-PH-K-S-LF-SN_C131334.html **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### CN4 — [B4B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b4b-ph-k-slfsn.md) - Connector Gender: Female - Manufacturer Part Number: B4B-PH-K-S(LF)(SN) - LCSC Part Number: C131334 - Part Type: Wire To Board / Wire To Wire Connector - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B4B-PH-K-S-LF-SN_B4B-PH-K-S-LF-SN_C131334.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B4B-PH-K-S-LF-SN_C131334.pdf - Connector Positions: 4 - Connector Pitch: 2mm - Manufacturer Name: JST - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_B4B-PH-K-S - Connector Type: Board to Wire - Connector Rows: 1 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### CN5 — [PH2.0-4P](https://www.flux.ai/lcsc/ph2p0-4p.md) - Package or Case Code: CONN-TH_PH2.0-4P - JLCPCB Part Class: Extended Part - Part Type: Wire To Board / Wire To Wire Connector - LCSC Part Number: C722763 - Manufacturer Part Number: PH2.0-4P - Manufacturer Name: CAX(创都) **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### CN6 — [PH2.0-4P](https://www.flux.ai/lcsc/ph2p0-4p.md) - Manufacturer Part Number: PH2.0-4P - Manufacturer Name: CAX(创都) - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_PH2.0-4P - Part Type: Wire To Board / Wire To Wire Connector - LCSC Part Number: C722763 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### D1 — [B270-13-F](https://www.flux.ai/lcsc/b270-13-f.md) - Package or Case Code: SMB_L4.3-W3.6-LS5.3-RD - Manufacturer Part Number: B270-13-F - Part Type: Schottky Barrier Diodes (SBD) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-B270-13-F_C134444.pdf - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_DIODES_B270-13-F_B270-13-F_C134444.html - LCSC Part Number: C134444 - Manufacturer Name: DIODES(美台) - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### D13 — [TPD4E02B04DQA](https://www.flux.ai/kicad-part-library/tpd4e02b04dqa.md) - Manufacturer Part Number: TPD4E02B04DQA - Datasheet URL: http://www.ti.com/lit/ds/symlink/tpd4e02b04.pdf - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: USON-10_2.5x1.0mm_P0.5mm - Role Details: ESD protection for USB-C D+, D-, CC1, CC2 lines - Role: Protection **Pins:** - G [pin 3] - G [pin 8] - IO1 [pin 1] - IO2 [pin 2] - IO3 [pin 4] - IO4 [pin 5] - NC [pin 10] - NC [pin 7] - NC [pin 9] - NC [pin 6] ### D14 — [SML-LX0805GC-TR](https://www.flux.ai/adrian95/sml-lx0805gc-tr.md) - Role: Signal Generation - Part Type: LED - Manufacturer Name: Lumex Opto/Components Inc. - Role Details: Power indicator LED - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lumex.com/spec/SML-LX0805GC-TR.pdf - Manufacturer Part Number: SML-LX0805GC-TR **Pins:** - A [pin 2] - K [pin 1] ### D2 — [PESD2CAN](https://www.flux.ai/lcsc/pesd2can.md) - Package: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - Reverse Voltage: 5V - Role Details: ESD protection for CANH and CANL lines - Manufacturer Name: UMW(友台半导体) - Forward Voltage: 0.9V - Role: Protection - Part Type: ESD Protection Devices - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - JLCPCB Part Class: Extended Part - Manufacturer Part Number: PESD2CAN - LCSC Part Number: C2687131 - Diode Type: TVS **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D3 — [PESD2CAN](https://www.flux.ai/lcsc/pesd2can.md) - Reverse Voltage: 5V - Manufacturer Name: UMW(友台半导体) - Forward Voltage: 0.9V - Part Type: ESD Protection Devices - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - Role: Protection - JLCPCB Part Class: Extended Part - LCSC Part Number: C2687131 - Manufacturer Part Number: PESD2CAN - Role Details: ESD protection for CANH and CANL lines - Package: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - Diode Type: TVS **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D4 — [SS54LB](https://www.flux.ai/rohit297/ss54lb.md) - Role: Flyback / Freewheeling - Manufacturer Name: LangJie - Part Type: Diode - Manufacturer Part Number: SS54LB - Datasheet URL: https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2307211837_LangJie-SS54LB_C7450527.pdf - Role Details: Flyback diode for U5 output stage **Pins:** - A [pin 2] - K [pin 1] ### ESP_EN — [ERJ-2RKF4701X](https://www.flux.ai/jecstronic/erj-2rkf4701x.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Panasonic Electronic Components - Resistance: 4.7kΩ - Datasheet URL: https://industrial.panasonic.com/cdbs/www-data/pdf/RDA0000/AOA0000C304.pdf - Manufacturer Part Number: ERJ-2RKF4701X - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### ESP_IO0 — [ERJ-2RKF4701X](https://www.flux.ai/jecstronic/erj-2rkf4701x.md) - Part Type: Resistor - License: https://creativecommons.org/licenses/by/4.0/ - Resistance: 4.7kΩ - Manufacturer Name: Panasonic Electronic Components - Datasheet URL: https://industrial.panasonic.com/cdbs/www-data/pdf/RDA0000/AOA0000C304.pdf - Manufacturer Part Number: ERJ-2RKF4701X **Pins:** - P1 [pin 1] - P2 [pin 2] ### J_COIL — [TerminalBlock-01x02P-5.00mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-500mm.md) - Role Details: External contactor coil interface - Part Type: Connector - Role: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### J1 — [XT30PW](https://www.flux.ai/mameluko63/xt30pw.md) - Manufacturer Part Number: XT30PW-M - Manufacturer Name: Amass - Part Type: Connector - Datasheet URL: https://grobotronics.com/images/companies/1/datasheets/XT30PW%20SPEC.pdf?1554377953748 **Pins:** - Neg - Pos ### J2 — [Pin Header 01x18 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x18-2p54mm-vertical.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J3 — [Pin Socket 01x06 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x06-254mm-vertical.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### J4 — [Pin Socket 01x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x03-254mm-vertical.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J5 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn.md) - Part Type: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Manufacturer Name: JST Sales America - Role Details: E-stop series input connector 1 (E_STOP_IN1) - 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] ### J6 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn.md) - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Name: JST Sales America - Role Details: E-stop series input connector 2 (E_STOP_IN2) **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J7 — [2024100002](https://www.flux.ai/adrian95/2024100002.md) - Role: Connector - Manufacturer Part Number: 2024100002 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf - Part Type: Connector - Manufacturer Name: Molex - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB-C port for programming interface **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### JP1 — [68786-202LF](https://www.flux.ai/adrian95/68786-202lf.md) - Manufacturer Name: Amphenol ICC (FCI) - Part Type: Connector - Package: 1x02P-2.54mm - Role: Configuration - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://cdn.amphenol-cs.com/media/wysiwyg/files/drawing/68786.pdf - Role Details: Selectable CAN termination enable/disable - Manufacturer Part Number: 68786-202LF **Pins:** - 1 [pin 1] - 2 [pin 2] ### LED1 — [SM0805HCL](https://www.flux.ai/adrian95/sm0805hcl.md) - Manufacturer Part Number: SM0805HCL - Role: Signal Generation - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: TX status LED - Datasheet URL: https://www.bivar.com/parts_content/Datasheets/SM0805HCL.pdf - Manufacturer Name: Bivar Inc. - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [LTST-C170YKT](https://www.flux.ai/lcsc/ltst-c170ykt.md) - Part Type: Light Emitting Diodes (LED) - Role: Signal Generation - Product Info Url: https://lcsc.com/product-detail/Light-Emitting-Diodes-LED_SMD-yellow_C125092.html - Manufacturer Part Number: LTST-C170YKT - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_Lite-On-LTST-C170YKT_C125092.pdf - JLCPCB Part Class: Extended Part - Role Details: RX status LED - LCSC Part Number: C125092 - Package or Case Code: LED0805-RD_YELLOW - Manufacturer Name: LITEON(光宝) **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [BC817-40-7-F](https://www.flux.ai/lcsc/bc817-40-7-f.md) - Manufacturer Part Number: BC817-40-7-F - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-BC817-40-7-F_C435867.pdf - Part Type: Bipolar Transistors - BJT - Manufacturer Name: DIODES(美台) - LCSC Part Number: C435867 - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_Diodes-Incorporated-BC817-40-7-F_C435867.html - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q2 — [BSC123N08NS3GATMA1](https://www.flux.ai/adrian95/bsc123n08ns3gatma1.md) - Manufacturer Part Number: BSC123N08NS3GATMA1 - Manufacturer Name: Infineon Technologies - Datasheet URL: https://www.infineon.com/dgdl/BSC123N08NS3G_rev2.5.pdf?folderId=db3a304313b8b5a60113cee8763b02d7&fileId=db3a30431add1d95011ae80eb8555625 - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### SW1 — [SKRKAEE020](https://www.flux.ai/lcsc/skrkaee020.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C115357 - Current Rating: 50mA - Package: SW-SMD_L3.9-W3.0-P4.45 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809201020_ALPSALPINE-SKRKAEE020_C115357.pdf - Role Details: Momentary push-button for ESP32 EN and IO0 lines - Part Type: Tactile Switches - Manufacturer Part Number: SKRKAEE020 - Throw Configuration: SPST - Voltage Rating: 12V - Manufacturer Name: ALPSALPINE(阿尔卑斯阿尔派) - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_ALPS_SKRKAEE020_3-4-2-1-57N_C115357.html - Switch Type: Tactile Switch (Momentary) **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [SKRKAEE020](https://www.flux.ai/lcsc/skrkaee020.md) - Current Rating: 50mA - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809201020_ALPSALPINE-SKRKAEE020_C115357.pdf - Package: SW-SMD_L3.9-W3.0-P4.45 - LCSC Part Number: C115357 - JLCPCB Part Class: Extended Part - Switch Type: Tactile Switch (Momentary) - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_ALPS_SKRKAEE020_3-4-2-1-57N_C115357.html - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Role Details: Momentary push-button for ESP32 EN and IO0 lines - Voltage Rating: 12V - Manufacturer Name: ALPSALPINE(阿尔卑斯阿尔派) - Part Type: Tactile Switches - Manufacturer Part Number: SKRKAEE020 - Throw Configuration: SPST **Pins:** - 1 [pin 1] - 2 [pin 2] ### TP1 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role: Test Point - Role Details: Debug measurement for 24V rail **Pins:** - P1 ### U1 — [MP2565DQ-Z](https://www.flux.ai/monolithicpower/mp2565dq-z.md) - Manufacturer Part Number: MP2565DQ-Z - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/M/P/MP2565_138_1_1.jpg - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2565 - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/138?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Package or Case Code: QFN10_MP2565_MNP - Manufacturer Name: Monolithic Power Systems **Pins:** - BST [pin 10] - COMP [pin 4] - EN [pin 3] - EPAD [pin 11] - FB [pin 5] - FREQ [pin 7] - GND [pin 6] - SW [pin 1] - SW [pin 2] - VIN [pin 9] - VIN [pin 8] ### U10 — [TCA9548ARGER](https://www.flux.ai/jecstronic/tca9548arger.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftca9548a - Manufacturer Part Number: TCA9548ARGER - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~RESET [pin 24] - 1EP [pin 25] - A0 [pin 22] - A1 [pin 23] - A2 [pin 18] - GND [pin 9] - SC0 [pin 2] - SC1 [pin 4] - SC2 [pin 6] - SC3 [pin 8] - SC4 [pin 11] - SC5 [pin 13] - SC6 [pin 15] - SC7 [pin 17] - SCL [pin 19] - SD0 [pin 1] - SD1 [pin 3] - SD2 [pin 5] - SD3 [pin 7] - SD4 [pin 10] - SD5 [pin 12] - SD6 [pin 14] - SD7 [pin 16] - SDA [pin 20] - VCC [pin 21] ### U11 — [WAFER-PH2.0-4PWB](https://www.flux.ai/lcsc/wafer-ph2p0-4pwb.md) - LCSC Part Number: C3029442 - Manufacturer Name: XUNPU(讯普) - Package or Case Code: CONN-SMD_4P-P2.00_XUNPU_WAFER-PH2.0-4PWB - Manufacturer Part Number: WAFER-PH2.0-4PWB - Part Type: Wire To Board / Wire To Wire Connector - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### U12 — [WAFER-PH2.0-4PWB](https://www.flux.ai/lcsc/wafer-ph2p0-4pwb.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: WAFER-PH2.0-4PWB - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Name: XUNPU(讯普) - Package or Case Code: CONN-SMD_4P-P2.00_XUNPU_WAFER-PH2.0-4PWB - LCSC Part Number: C3029442 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### U2 — [ESP32-WROOM-32UE-N16](https://www.flux.ai/lcsc/esp32-wroom-32ue-n16.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: ESP32-WROOM-32UE-N16 - Package or Case Code: WIFI-SMD_ESP32-WROOM-32UE - LCSC Part Number: C2973647 - Manufacturer Name: ESPRESSIF(乐鑫) **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 39] - GND [pin 1] - GND [pin 15] - GND [pin 38] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 32] - NC [pin 19] - NC [pin 18] - NC [pin 22] - NC [pin 20] - NC [pin 17] - NC [pin 21] - RXD0 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0 [pin 35] ### U3 — [SN65HVD230Q-Q1](https://www.flux.ai/adrian95/sn65hvd230q-q1.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/sn65hvd230q-q1.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Interface - Role Details: CAN transceiver powered from 3.3V (Net 7) - Manufacturer Name: Texas Instruments - Manufacturer Part Number: SN65HVD230Q-Q1 - Part Type: Integrated Circuit **Pins:** - CANH [pin 7] - CANL [pin 6] - D [pin 1] - GND [pin 2] - R [pin 4] - RS [pin 8] - VCC [pin 3] - VREF [pin 5] ### U4 — [ICM-42688-P](https://www.flux.ai/jecstronic/icm-42688-p.md) - Role Details: 6-axis IMU for motion sensing via SPI - License: https://creativecommons.org/licenses/by/4.0/ - Package: LGA-14_L3.0-W2.5-P0.50-TL - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/495/ICM-42688-P_DS_Rev1.2.pdf - Manufacturer Name: TDK InvenSense - Manufacturer Part Number: ICM-42688-P - Part Type: Sensor - Role: Sensor **Pins:** - AP_CS [pin 12] - AP_SCL/AP_SCLK [pin 13] - AP_SDA/AP_SDIO/AP_SDI [pin 14] - AP_SDO/AP_AD0 [pin 1] - GND [pin 6] - INT1/INT [pin 4] - INT2/FSYNC/CLKIN [pin 9] - RESV_10 [pin 10] - RESV_11 [pin 11] - RESV_2 [pin 2] - RESV_3 [pin 3] - RESV_7 [pin 7] - VDD [pin 8] - VDDIO [pin 5] ### U5 — [TPS54560DDA](https://www.flux.ai/lcsc/tps54560dda.md) - JLCPCB Part Class: Extended Part - Role: Power Management - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_Texas-Instruments-Texas-Instruments-TPS54560DDA_C465738.html - LCSC Part Number: C465738 - Part Type: DC-DC Converters - Manufacturer Name: TI(德州仪器) - Package or Case Code: SO-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Manufacturer Part Number: TPS54560DDA - Role Details: Buck converter for 36V to 24V output stage - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Texas-Instruments-TPS54560DDA_C465738.pdf - Package: SO-8_L4.9-W3.9-P1.27-LS6.0-BL-EP **Pins:** - BOOT [pin 1] - COMP [pin 6] - EN [pin 3] - EP [pin 9] - FB [pin 5] - GND [pin 7] - RT/CLK [pin 4] - SW [pin 8] - VIN [pin 2] ### U6 — [CP2102N-A02-GQFN28R](https://www.flux.ai/lcsc/cp2102n-a02-gqfn28r.md) - Package or Case Code: QFN-28_L5.0-W5.0-P0.50-TL-EP3.3 - Part Type: USB ICs - JLCPCB Part Class: Extended Part - Role: Interface - Role Details: USB-to-UART Bridge for ESP32 programming - LCSC Part Number: C964632 - Logic Function: USB to UART - Operating Temperature: -40℃~+85℃@(Ta) - Supply Voltage: 3~3.6V - Manufacturer Name: SKYWORKS/SILICON LABS(芯科) - Package: QFN-28_L5.0-W5.0-P0.50-TL-EP3.3 - Manufacturer Part Number: CP2102N-A02-GQFN28R **Pins:** - CHR0 [pin 15] - CHR1 [pin 14] - CHREN [pin 13] - CTS [pin 23] - D- [pin 5] - D+ [pin 4] - DCD [pin 1] - DSR [pin 27] - DTR [pin 28] - EP [pin 29] - GND [pin 3] - GPIO.0/TXT [pin 19] - GPIO.1/RXT [pin 18] - GPIO.2/RS485 [pin 17] - GPIO.3/WAKEUP [pin 16] - GPIO.4 [pin 22] - GPIO.5 [pin 21] - GPIO.6 [pin 20] - NC [pin 10] - RI/CLK [pin 2] - RSTb [pin 9] - RTS [pin 24] - RXD [pin 25] - SUSPEND [pin 12] - SUSPENDb [pin 11] - TXD [pin 26] - VBUS [pin 8] - VDD [pin 6] - VREGIN [pin 7] ### U7 — [SMCJ58A(BOURNS)](https://www.flux.ai/lcsc/smcj58abourns.md) - Manufacturer Name: BOURNS - LCSC Part Number: C913185 - Package or Case Code: SMC_L6.9-W5.9-LS7.9-RD - Manufacturer Part Number: SMCJ58A(BOURNS) **Pins:** - A [pin 2] - C [pin 1] ### U8 — [WAFER-PH2.0-2PLB](https://www.flux.ai/lcsc/wafer-ph2p0-2plb.md) - Package or Case Code: CONN-TH_2P-P2.00_XUNPU_WAFER-PH2.0-2PLB - Manufacturer Part Number: WAFER-PH2.0-2PLB - JLCPCB Part Class: Extended Part - LCSC Part Number: C3029431 - Manufacturer Name: XUNPU(讯普) - Part Type: Wire To Board / Wire To Wire Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U9 — [WAFER-PH2.0-2PLB](https://www.flux.ai/lcsc/wafer-ph2p0-2plb.md) - Manufacturer Name: XUNPU(讯普) - Part Type: Wire To Board / Wire To Wire Connector - JLCPCB Part Class: Extended Part - Manufacturer Part Number: WAFER-PH2.0-2PLB - Package or Case Code: CONN-TH_2P-P2.00_XUNPU_WAFER-PH2.0-2PLB - LCSC Part Number: C3029431 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/raphiki66/pcb-e-dolly](https://www.flux.ai/raphiki66/pcb-e-dolly).* --- *Generated from [https://www.flux.ai/raphiki66/pcb-e-dolly](https://www.flux.ai/raphiki66/pcb-e-dolly)*