# Costly Ivory Mr. Fusion ## Description Relay HAT Schematic – Post‑Validation Fix Plan (ULN2803A, Buck → Pico, LEDs, Optos, Testpoints) ## Project Details - **Owner:** bwangerin55 - **Created:** 12/2/2025 - **Last Updated:** 12/2/2025 - **Visibility:** Public - **Stackup Type:** Standard 4 Layer - **Connectivity:** USB - **PCB Stackup:** Standard 4 Layer - **Orientation Checklist:** Relay & Terminal Orientation Relays (SRD-12VDC-SL-C, K1–K4) - K1 Orientation Angle: 0° - K1 Board-Edge Facing Direction: East - K2 Orientation Angle: 0° - K2 Board-Edge Facing Direction: East - K3 Orientation Angle: 0° - K3 Board-Edge Facing Direction: East - K4 Orientation Angle: 0° - K4 Board-Edge Facing Direction: East Terminal Blocks (TE 282837-3, J3–J6) - J3 Orientation Angle: 180° - J3 Board-Edge Facing Direction: West - J4 Orientation Angle: 180° - J4 Board-Edge Facing Direction: West - J5 Orientation Angle: 180° - J5 Board-Edge Facing Direction: West - J6 Orientation Angle: 180° - J6 Board-Edge Facing Direction: West - **Operating Voltage:** 12V - **Board Outline Width:** 50mm - **K2 Orientation Angle:** 0° - **J4 Board-Edge Facing Direction:** West - **K4 Board-Edge Facing Direction:** East - **Domain:** Consumer Electronics - **J4 Orientation Angle:** 180° - **K3 Orientation Angle:** 0° - **J5 Orientation Angle:** 180° - **K1 Orientation Angle:** 0° - **License:** https://www.gnu.org/licenses/gpl-3.0.html - **K4 Orientation Angle:** 0° - **Manufacturability Issues:** - Verify all generic passives have finalized MPNs and are orderable in chosen package sizes (0603/0805/1206). - Re-run parts availability review before ordering to catch any newly out-of-stock components. - Confirm Raspberry Pi Pico HAT mechanical fit: check header alignment, board outline (50 mm × 80 mm), and mounting hole positions vs. Pico datasheet. - Review relay contact ratings vs. each 12 V battery’s expected load current and inrush conditions. - Ensure 12 V and high-current relay traces use adequate width and spacing for the target current and manufacturing rules. - Double-check clearance/creepage between logic (3.3/5 V) and any user-accessible high-current 12 V nodes on the terminal blocks. - Validate thermal performance of the buck regulator at worst-case 12 V input and Pico + relay-coil load. - Confirm test point accessibility for 12 V input, 5 V rail, each battery input, and ground during probing. - Add silkscreen labels for all relay channels (CH1–CH4), battery inputs, NO/NC/COM, and test points for ease of assembly and debug. - Plan panelization or mounting strategy if multiple HATs will be used in a single enclosure. - **K2 Board-Edge Facing Direction:** East - **J6 Board-Edge Facing Direction:** West - **Layer Fill Strategy:** GND net pour on all signal layers - **Software:** Bare metal - **J6 Orientation Angle:** 180° - **J3 Orientation Angle:** 180° - **K3 Board-Edge Facing Direction:** East - **J3 Board-Edge Facing Direction:** West - **Power Requirements:** USB - **Manufacturing Quantity Target:** 10 - **Board Outline Height:** 80mm - **J5 Board-Edge Facing Direction:** West - **Layer 3 Role:** 5 V plane - **System Architecture:** ```mermaid flowchart LR subgraph Power A[12V Input] --> B[Reverse-Polarity Protection] B --> C[5V Regulator] C --> D[Raspberry Pi Pico VSYS/VBUS] B --> E[ULN2803A Vcc] B --> F[Relay Coils Vcc] end subgraph Control D --> G[Pico GPIO Header] G --> H{Opto-Isolators (Optional)} H --> I[ULN2803A Low-Side Driver] end subgraph Relays I --> J1[Relay 1 Coil] I --> J2[Relay 2 Coil] I --> J3[Relay 3 Coil] I --> J4[Relay 4 Coil] end subgraph Outputs J1 --> K1[Terminal Block 1 (COM/NO/NC)] J2 --> K2[Terminal Block 2 (COM/NO/NC)] J3 --> K3[Terminal Block 3 (COM/NO/NC)] J4 --> K4[Terminal Block 4 (COM/NO/NC)] end subgraph Indicators I --> L1[LED1 + R1] I --> L2[LED2 + R2] I --> L3[LED3 + R3] I --> L4[LED4 + R4] end ``` - **K1 Board-Edge Facing Direction:** East - **Layer 2 Role:** GND plane ## Key Components ### BuckReg — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Max Input Voltage: 50V - Role Details: Opto-isolation for relay channel 2 - Package or Case Code: DIP-4_W7.62mm - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Continuous Drain Current: 0.5A - Manufacturer Part Number: PC817 - Role: Isolation **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 2] - ~ [pin 4] ### BuckReg — [ULN2803A](https://www.flux.ai/lcsc/uln2803a~i9jk.md) - Part Type: Darlington transistor array driver - Role: Driver - Package or Case Code: SOP-18_L11.4-W7.6-P1.27-LS10.6-BL - Product Info Url: https://lcsc.com/product-detail/Darlington-transistor-array-driver_UMW-Youtai-Semiconductor-Co-Ltd-ULN2803A_C845537.html - Role Details: Darlington array to drive 12V relay coils - Manufacturer Name: UMW(友台半导体) - Manufacturer Part Number: ULN2803A - LCSC Part Number: C845537 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410251531_UMW-Youtai-Semiconductor-Co---Ltd--ULN2803A_C845537.pdf - JLCPCB Part Class: Extended Part **Pins:** - COM [pin 10] - GND [pin 9] - Input [pin 5] - Input [pin 1] - Input [pin 6] - Input [pin 4] - Input [pin 8] - Input [pin 3] - Input [pin 2] - Input [pin 7] - Output [pin 16] - Output [pin 15] - Output [pin 13] - Output [pin 12] - Output [pin 18] - Output [pin 17] - Output [pin 11] - Output [pin 14] ### D1 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Part Type: Diode - Role Details: Reverse polarity protection diode on 12V input - Role: Protection - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf **Pins:** - Anode [pin A] - Cathode [pin C] ### F1 — [24F 2A250V](https://www.flux.ai/lcsc/24f-2a250v~tkmz.md) - Manufacturer Part Number: 24F 2A250V - JLCPCB Part Class: Extended Part - Manufacturer Name: xcfuse(旭程) - Role: Protection - Package or Case Code: FUSE-SMD_L6.1-W2.6 - LCSC Part Number: C2905496 - Role Details: Input fuse for 12V rail - Part Type: Fuses **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [Adafruit 2222 Raspberry Pi Header](https://www.flux.ai/kofron/adafruit-2222-raspberry-pi-header~49.md) - Role Details: GPIO header for Raspberry Pi Pico HAT - Role: Connector **Pins:** - 3v3 [pin 17] - 3v3 [pin 1] - 5V PWR [pin 2] - 5V PWR [pin 4] - GPIO 0 (HAT EEPROM i2c Data) [pin 27] - GPIO 1 (HAT EEPROM i2c Clock) [pin 28] - GPIO 10 (SPI0 MOSI) [pin 19] - GPIO 11 (SPI0 SCLK) [pin 23] - GPIO 12 (PWM0) [pin 32] - GPIO 13 (PWM1) [pin 33] - GPIO 14 (UART Transmit) [pin 8] - GPIO 15 (UART Receive) [pin 10] - GPIO 16 [pin 36] - GPIO 17 [pin 11] - GPIO 18 (PCM Clock) [pin 12] - GPIO 19 (PCM Frame Sync) [pin 35] - GPIO 20 (PCM Data-In) [pin 38] - GPIO 21 (PCM Data-Out) [pin 40] - GPIO 22 [pin 15] - GPIO 23 [pin 16] - GPIO 24 [pin 18] - GPIO 25 [pin 22] - GPIO 26 [pin 37] - GPIO 27 [pin 13] - GPIO 5 [pin 29] - GPIO 6 [pin 31] - GPIO 7 (SPI Chip Select 1) [pin 26] - GPIO 8 (SPI Chip Select 0) [pin 24] - GPIO 9 (SPI0 MISO) [pin 21] - GPIO2 (I2C1 SDA) [pin 3] - GPIO3 (I2C1 SCL) [pin 5] - GPIO4 (GPCLK0) [pin 7] - Ground [pin 25] - GROUND [pin 30] - GROUND [pin 6] - GROUND [pin 20] - GROUND [pin 39] - GROUND [pin 9] - GROUND [pin 34] - GROUND [pin 14] ### J10 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Role: Connector - Role Details: 12V battery input terminal block - Manufacturer Part Number: 282837-2 - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Part Type: Connector - Role Details: 12V input terminal block - Manufacturer Name: TE Connectivity AMP Connectors - Manufacturer Part Number: 282837-2 - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Role: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [282837-3](https://www.flux.ai/adrian95/282837-3~5mc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Manufacturer Name: TE Connectivity AMP Connectors - Role Details: Relay output terminal block (COM/NO/NC) channel 1 - Manufacturer Part Number: 282837-3 - Part Type: Connector - Datasheet URL: https://www.te.com/usa-en/product-282837-3.datasheet.pdf **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J4 — [282837-3](https://www.flux.ai/adrian95/282837-3~5mc.md) - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Datasheet URL: https://www.te.com/usa-en/product-282837-3.datasheet.pdf - Role: Connector - Role Details: Relay output terminal block (COM/NO/NC) channel 2 - Manufacturer Part Number: 282837-3 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J5 — [282837-3](https://www.flux.ai/adrian95/282837-3~5mc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: TE Connectivity AMP Connectors - Role Details: Relay output terminal block (COM/NO/NC) channel 3 - Manufacturer Part Number: 282837-3 - Role: Connector - Datasheet URL: https://www.te.com/usa-en/product-282837-3.datasheet.pdf - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J6 — [282837-3](https://www.flux.ai/adrian95/282837-3~5mc.md) - Manufacturer Name: TE Connectivity AMP Connectors - Datasheet URL: https://www.te.com/usa-en/product-282837-3.datasheet.pdf - Part Type: Connector - Manufacturer Part Number: 282837-3 - Role Details: Relay output terminal block (COM/NO/NC) channel 4 - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J7 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Manufacturer Part Number: 282837-2 - Role Details: 12V battery input terminal block - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Role: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English **Pins:** - 1 [pin 1] - 2 [pin 2] ### J8 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Manufacturer Part Number: 282837-2 - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Role: Connector - Role Details: 12V battery input terminal block - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English **Pins:** - 1 [pin 1] - 2 [pin 2] ### J9 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Role Details: 12V battery input terminal block - Manufacturer Part Number: 282837-2 - Part Type: Connector - Manufacturer Name: TE Connectivity AMP Connectors - Role: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English **Pins:** - 1 [pin 1] - 2 [pin 2] ### K1 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Manufacturer Name: Ningbo Songle Relay - Role: Relay - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: SPDT relay channels - Part Type: Relay - KiCAD Orientation Offset: 0° - Manufacturer Part Number: SRD-12VDC-SL-C - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf **Pins:** - COIL1 [pin COIL1] - COIL2 [pin COIL2] - COM [pin COM] - NC [pin NC] - NO [pin NO] ### K2 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Part Type: Relay - Manufacturer Name: Ningbo Songle Relay - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf - Role Details: SPDT relay channels - KiCAD Orientation Offset: 0° - Role: Relay - Manufacturer Part Number: SRD-12VDC-SL-C **Pins:** - COIL1 [pin COIL1] - COIL2 [pin COIL2] - COM [pin COM] - NC [pin NC] - NO [pin NO] ### K3 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Part Type: Relay - Role: Relay - Role Details: SPDT relay channels - Manufacturer Name: Ningbo Songle Relay - KiCAD Orientation Offset: 0° - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf - Manufacturer Part Number: SRD-12VDC-SL-C **Pins:** - COIL1 [pin COIL1] - COIL2 [pin COIL2] - COM [pin COM] - NC [pin NC] - NO [pin NO] ### K4 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Part Type: Relay - Role: Relay - Manufacturer Name: Ningbo Songle Relay - License: https://creativecommons.org/licenses/by/4.0/ - KiCAD Orientation Offset: 0° - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf - Role Details: SPDT relay channels - Manufacturer Part Number: SRD-12VDC-SL-C **Pins:** - COIL1 [pin COIL1] - COIL2 [pin COIL2] - COM [pin COM] - NC [pin NC] - NO [pin NO] ### LED1 — [SML-D13FWT86C](https://www.flux.ai/jecstronic/sml-d13fwt86c~i2q.md) - Role: LED - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SML-D13FWT86C - Package: D_0603_1608Metric - Part Type: LED - Role Details: Status indicator LED for relay channel - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/opto/led/chip_mono/sml-d13fwt86(c)-e.pdf - Manufacturer Name: Rohm Semiconductor **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [SML-D13FWT86C](https://www.flux.ai/jecstronic/sml-d13fwt86c~i2q.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Status indicator LED for relay channel - Manufacturer Part Number: SML-D13FWT86C - Role: LED - Part Type: LED - Manufacturer Name: Rohm Semiconductor - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/opto/led/chip_mono/sml-d13fwt86(c)-e.pdf - Package: D_0603_1608Metric **Pins:** - A [pin 2] - K [pin 1] ### LED3 — [SML-D13FWT86C](https://www.flux.ai/jecstronic/sml-d13fwt86c~i2q.md) - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/opto/led/chip_mono/sml-d13fwt86(c)-e.pdf - Manufacturer Name: Rohm Semiconductor - Part Type: LED - Role: LED - Package: D_0603_1608Metric - Manufacturer Part Number: SML-D13FWT86C - Role Details: Status indicator LED for relay channel - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### LED4 — [SML-D13FWT86C](https://www.flux.ai/jecstronic/sml-d13fwt86c~i2q.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: LED - Manufacturer Part Number: SML-D13FWT86C - Package: D_0603_1608Metric - Role Details: Status indicator LED for relay channel - Part Type: LED - Manufacturer Name: Rohm Semiconductor - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/opto/led/chip_mono/sml-d13fwt86(c)-e.pdf **Pins:** - A [pin 2] - K [pin 1] ### Opto1 — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Role Details: Opto-isolation for relay channel 4 - Package or Case Code: DIP-4_W7.62mm - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Role: Isolation - Manufacturer Part Number: PC817 **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 2] - ~ [pin 4] ### PicoHeader — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Role Details: Opto-isolation for relay channel 1 - Manufacturer Part Number: PC817 - Max Output Voltage: 5.5V - Role: Isolation - Max Input Voltage: 28V - Package or Case Code: DIP-4_W7.62mm - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 2] - ~ [pin 4] ### RelayDriver — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Manufacturer Part Number: PC817 - Package or Case Code: DIP-4_W7.62mm - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Role: Isolation - Role Details: Opto-isolation for relay channel 3 **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 2] - ~ [pin 4] ### ReverseDiode — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - Role Details: Reverse-polarity protection for 12V input - Manufacturer Name: Slkor(SLKORMICRO Elec.) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Role: Protection - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf **Pins:** - Anode [pin A] - Cathode [pin C] ### SurgeTVS — [D5V0F4U6SO-7](https://www.flux.ai/adrian95/d5v0f4u6so-7~4y1.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/D5V0F4U6SO.pdf - Manufacturer Name: Diodes Incorporated - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Surge protection TVS diode on 12V input - Manufacturer Part Number: D5V0F4U6SO-7 - Part Type: Diode - Role: Protection **Pins:** - CH_1 [pin 1] - CH_2 [pin 3] - CH_3 [pin 4] - CH_4 [pin 6] - GND [pin 2] - VDD [pin 5] ### TP1 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Keystone Electronics - Manufacturer Part Number: 5019 - Part Type: Test Point - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Package or Case Code: 5019 **Pins:** - 1 [pin 1] ### TP2 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Test Point - Manufacturer Part Number: 5019 - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - Manufacturer Name: Keystone Electronics - Part Type: Test Point - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Package or Case Code: 5019 **Pins:** - 1 [pin 1] ### TP3 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Part Type: Test Point - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Role: Test Point - Package or Case Code: 5019 - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 **Pins:** - 1 [pin 1] ### TP4 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Test Point - Manufacturer Name: Keystone Electronics - Manufacturer Part Number: 5019 - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - Package or Case Code: 5019 **Pins:** - 1 [pin 1] ### TP5 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Package or Case Code: 5019 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - Part Type: Test Point - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics **Pins:** - 1 [pin 1] ### TP6 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Role Details: Test points for monitoring the 5 V rail, each 12 V battery input, and ground - Role: Test Point - Package or Case Code: 5019 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Test Point - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics **Pins:** - 1 [pin 1] ### TP7 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Test point for monitoring the 12 V input - Part Type: Test Point - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Role: Test Point - Package or Case Code: 5019 **Pins:** - 1 [pin 1] ### U5 — [TPS63070RNMT](https://www.flux.ai/lcsc/tps63070rnmt~4ibl.md) - Role: Power Management - Role Details: Buck regulator converting PROTECTED_12V to 5V for Pico VSYS - JLCPCB Part Class: Extended Part - LCSC Part Number: C964639 - Part Type: DC-DC Converters - Package or Case Code: VQFN-HR-15_L3.0-W2.5-P0.50-BL_TPS63070RNMR - Manufacturer Part Number: TPS63070RNMT - Manufacturer Name: TI(德州仪器) **Pins:** - EN [pin 14] - FB [pin 5] - FB2 [pin 6] - GND [pin 4] - L1 [pin 11] - L2 [pin 9] - PG [pin 2] - PGND [pin 10] - PS/SYNC [pin 1] - VAUX [pin 3] - VIN [pin 12] - VIN [pin 13] - VOUT [pin 7] - VOUT [pin 8] - VSEL [pin 15] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/bwangerin55/costly-ivory-mrp-fusion~0w](https://www.flux.ai/bwangerin55/costly-ivory-mrp-fusion~0w).* --- *Generated from [https://www.flux.ai/bwangerin55/costly-ivory-mrp-fusion~0w](https://www.flux.ai/bwangerin55/costly-ivory-mrp-fusion~0w)*