4 layers90.8 × 58.8 mm
HALSER
hatlabs/HALSER-hardware
Hat Labs Serial Interface Device hardware design files
199 partsCC-BY-4.0
6 layers187 × 109 mm
HALPI2
hatlabs/HALPI2-hardware9Hat Labs Pi Carrier Board 2 design files
- Size
- 187 × 109 mm
- Copper layers
- 6
- Thickness
- 1.56 mm
- Parts
- 739
- Nets
- 536
- Pads
- 2,477
- Tracks, vias
- 5,226, 1,660
- Pours
- 2,347
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jan 2025
- Updated
- 12 Jun 2026
Overview
HALPI2 is an open-source printed circuit board by hatlabs, from the hatlabs/HALPI2-hardware repository on GitHub. It is a 6-layer board of 187 × 109 mm with 739 parts on 536 nets, routed with 5,226 tracks and 1,660 vias.
It is built around the B0505S-1WR3, RCLAMP0524P and 74LVC1GU04GW, with the SMTSO2515CTJ, BLM21PG600SN1 and 1N5819WS among its other parts. Its parts include 179 capacitors, 119 resistors, 36 diodes, 34 ICs and 15 connectors. It belongs with the computers and single-board computers boards of this library.
Main components
12
B0505S-1WR3
SIP,11.7x6mm-40℃~+105℃ 1 1.5kV 10.2mm 11.68mm 1W 200kHz~340kHz 200mA 2400uF 30mVp-p 4.5V~5.5V 5V 6mA 6mm 86% Short Circuit Protection 塑封型 非稳压型 SIP,11.7x6mm Isolated Power Modules ROHSEVISUNIsolated Power ModulesRCLAMP0524P
DFN2510-10-55℃~+125℃ 0.35pF、0.8pF 17V 4.5A 5V 6.8V 80nA ESD Four channels IEC 61000-4-2 Unidirectional DFN2510-10 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
74LVC1GU04GW
SOT-353-40℃~+125℃ 1 1 1.32V~4.4V 1.65V~5.5V 32mA 32mA 330mV~1.1V 4ns@5V,50pF 4uA 74LVC SOT-353 Inverters ROHSNexperiaInverters
SMTSO2515CTJ
-M2.5X1.5 Tin plated - Patch round nut ROHSSinhooSMD Round Nut
BLM21PG600SN1
08051 20mΩ 3.5A 60Ω@100MHz ±25% 0805 Ferrite Beads ROHSMurataFerrite Beads
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
ESD5451N
DFN1006-2(0402)-55℃~+125℃ 1 13V 5.5A 5V 8.4V 80nA 90W Bidirectional ESD IEC 61000-4-2 DFN1006-2(0402) ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
SK6805SIDE-G-003
SMD,1.6x3.5mm-40℃~+85℃ 0.25mA 1.25mm 1.55mm 100ns 120° 2000V 200ns 280ns 3.5mm 3.7V~5.5V 4kHz 520nm~530nm 800Kbit/s Built-in power-on reset circuit、Built-in one-way transmission function Translucent Frosted Lens SMD,1.6x3.5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching Diodes
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
BAT54C,215-CN
SOT-231 Pair Common Cathode 1V@100mA 200mA 2uA@25V 30V 600mA SOT-23 Schottky Diodes ROHSChipNoboSchottky DiodesCMH201209B4R7MT
0805300mΩ 4.7uH 750mA ±20% 0805 Power Inductors ROHSGuangdong Fenghua Advanced Tech (FH)Power Inductors
README
README.mdHALPI2 Hardware
Raspberry Pi Compute Module 5 carrier board designed for marine and industrial embedded applications.
| Top | Bottom |
|---|---|
 |  |
Features
- Power management — Supercapacitor-backed power supply with graceful shutdown on power loss
- RP2040 control MCU — Manages power sequencing, watchdog, and system monitoring
- CAN bus — Isolated NMEA 2000 / CAN 2.0B interface
- RS-485 — Isolated serial interface
- USB — USB 2.0 and USB 3.0 with onboard hub
- Ethernet — Gigabit Ethernet
- HDMI — Full-size HDMI output via FPC connection
- PCIe / NVMe — M.2 slot for NVMe storage
- DSI display — MIPI DSI connector for touchscreen displays
- Analog monitoring — Input voltage, supercap voltage, and input current sensing
- RTC — Coin cell backed real-time clock
Design Details
- EDA: KiCad 9.0
- Board revision: v0.7.0
- Module support: Raspberry Pi CM5
- License: CERN-OHL-S v2
Related Repositories
| Repository | Description |
|---|---|
| HALPI2-firmware | RP2040 embedded firmware (Rust/Embassy) |
| HALPI2-rust-daemon | Linux power management daemon |
| halpi2 | User documentation (mdBook) |
| HALPI2-HDMI-FPC | Impedance-controlled HDMI flexible PCB |
Links
License
This hardware design is licensed under the CERN Open Hardware Licence Version 2 — Strongly Reciprocal (CERN-OHL-S v2).
Parts
739| Qty | Value | Footprint | References |
|---|---|---|---|
| 62 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP2, TP3, TP11, TP14, TP17, TP22, TP23, TP24, TP25, TP26, TP27, TP28, TP29, TP30, TP31, TP32 +46 |
| 53 | 1uF | Capacitor_SMD:C_0402_1005Metric | C101, C113, C114, C115, C116, C117, C118, C119, C120, C133, C134, C135, C139, C143, C145, C149 +37 |
| 27 | 100nF | Capacitor_SMD:C_0201_0603Metric | C100, C102, C103, C104, C105, C106, C107, C108, C109, C110, C112, C123, C124, C127, C128, C131 +11 |
| 25 | 10k | Resistor_SMD:R_0402_1005Metric | R35, R36, R47, R64, R65, R68, R69, R70, R71, R72, R73, R105, R113, R152, R153, R154 +9 |
| 25 | RCLAMP0524P | Package_DFN_QFN:Diodes_UDFN-10_1.0x2.5mm_P0.5mm | U11, U12, U13, U14, U15, U16, U17, U18, U20, U21, U22, U24, U25, U26, U27, U28 +9 |
| 18 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP63, TP68, TP71, TP72, TP73, TP74, TP75, TP76, TP77, TP78, TP79, TP80, TP81, TP82, TP83 +2 |
| 16 | 10uF | Capacitor_SMD:C_0805_2012Metric | C27, C35, C65, C67, C68, C70, C80, C86, C111, C121, C125, C129, C136, C137, C138, C140 |
| 13 | 1k | Resistor_SMD:R_0402_1005Metric | R27, R38, R39, R40, R41, R44, R45, R46, R48, R49, R50, R95, R122 |
| 13 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C84, C90, C91, C144, C146, C148, C150, C154, C155, C158, C160, C175, C186 |
| 12 | 51k | Resistor_SMD:R_0402_1005Metric | R7, R8, R10, R12, R13, R15, R17, R18, R20, R22, R23, R25 |
| 9 | SMTSO2515CTJ | Hatlabs:SMTSO2515CTJ | H3, H4, H5, H6, H17, H18, H19, H20, H21 |
| 8 | 100k | Resistor_SMD:R_0402_1005Metric | R26, R66, R89, R91, R93, R112, R131, R151 |
| 8 | 1uF/50V | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C6, C8, C53, C173, C174 |
| 8 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP9, TP10, TP12, TP13, TP15, TP16, TP18, TP19 |
| 7 | 10uF/50V | Capacitor_SMD:C_1206_3216Metric | C7, C9, C10, C11, C12, C13, C172 |
| 6 | 100pF | Capacitor_SMD:C_0603_1608Metric | C152, C153, C162, C163, C164, C165 |
| 6 | 10uF | Capacitor_SMD:C_0603_1608Metric | C46, C47, C52, C55, C63, C64 |
| 6 | BLM21PG600SN1 | Inductor_SMD:L_0805_2012Metric | FB3, FB4, FB5, FB6, FB7, FB8 |
| 6 | GREEN LED | LED_SMD:LED_0603_1608Metric | D20, D28, D30, D35, D36, D40 |
| 6 | MountingHole | MountingHole:MountingHole_4.3x6.2mm_M4_Pad_Via | H7, H8, H9, H10, H11, H12 |
| 5 | 100nF | Capacitor_SMD:C_0402_1005Metric | C71, C72, C73, C74, C177 |
| 5 | 1N5819WS | Diode_SMD:D_SOD-323 | D12, D14, D15, D44, D45 |
| 5 | 3.3k | Resistor_SMD:R_0402_1005Metric | R100, R101, R104, R110, R111 |
| 5 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J9, J30, J31, J33, J34 |
| 5 | ESD5451N | Diode_SMD:D_0402_1005Metric | D9, D10, D11, D18, D19 |
| 5 | SK6805SIDE-G-003 | HL_LED:LED-SMD_4P-L3.5-W1.55_SK6805SIDE-G | LED1, LED2, LED3, LED4, LED5 |
| 4 | 10R | Resistor_SMD:R_0402_1005Metric | R106, R107, R108, R109 |
| 4 | 12pF | Capacitor_SMD:C_0402_1005Metric | C87, C88, C141, C142 |
| 4 | 1N4148WT | Diode_SMD:D_SOD-523 | D13, D16, D23, D38 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C2, C14, C54, C182 |
| 4 | 2.7k | Resistor_SMD:R_0603_1608Metric | R59, R97, R132, R134 |
| 4 | 20R | Resistor_SMD:R_1210_3225Metric | R145, R146, R147, R148 |
| 4 | 220uF | Capacitor_SMD:CP_Elec_6.3x7.7 | C81, C122, C126, C130 |
| 4 | 22nF/100V | Capacitor_SMD:C_0603_1608Metric | C75, C76, C78, C79 |
| 4 | 27k | Resistor_SMD:R_0402_1005Metric | R67, R90, R92, R94 |
| 4 | 33k | Resistor_SMD:R_0603_1608Metric | R6, R11, R16, R21 |
| 4 | 49.9R | Resistor_SMD:R_0402_1005Metric | R60, R61, R62, R63 |
| 4 | 49.9k | Resistor_SMD:R_0402_1005Metric | R9, R14, R19, R24 |
| 4 | 560R | Resistor_SMD:R_0603_1608Metric | R141, R142, R143, R144 |
| 4 | AP22652W6-7 | Package_TO_SOT_SMD:SOT-23-6 | U29, U33, U36, U39 |
| 4 | B5819W | Diode_SMD:D_SOD-123 | D5, D6, D7, D8 |
| 4 | BAT54C,215 | Package_TO_SOT_SMD:SOT-23 | D22, D24, D25, D26 |
| 4 | CMH201209B4R7MT | Inductor_SMD:L_0805_2012Metric | L6, L7, L8, L9 |
| 4 | FB3 | TestPoint:TestPoint_Pad_D1.0mm | TP20, TP21, TP65, TP93 |
| 4 | FMMT617 | Package_TO_SOT_SMD:SOT-23 | Q13, Q14, Q15, Q16 |
| 4 | HT-2R7-J256VYJ21 | Hatlabs:CP_Radial_D16.0mm_P7.50mm | C15, C17, C19, C21 |
| 4 | MountingHole | HL_MountingHole:MountingHole_4.3mm_M4_Outline | H13, H14, H15, H16 |
| 4 | SMTSO2530CTJ | Hatlabs:SMTSO2515CTJ | H22, H23, H24, H25 |
| 4 | USB3_A | HL_Connector_USB:USB3.0-A-SMD_916-862A205EY10200 | J21, J22, J23, J24 |
| 4 | nSMD005/60V | Fuse:Fuse_1206_3216Metric | F2, F3, F4, F5 |
| 3 | 0R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R51, R135, R136 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C25, C33, C168 |
| 3 | 2.2k | Resistor_SMD:R_0402_1005Metric | R53, R54, R55 |
| 3 | 220uF/16V | Capacitor_SMD:CP_Elec_6.3x7.7 | C28, C36, C183 |
| 3 | 2k | Resistor_SMD:R_0402_1005Metric | R52, R123, R133 |
| 3 | 49.9k | Resistor_SMD:R_0603_1608Metric | R56, R57, R96 |
| 3 | AP2553W6-7 | Package_TO_SOT_SMD:SOT-23-6 | U19, U23, U42 |
| 3 | MMBT5551 | Package_TO_SOT_SMD:SOT-23 | Q7, Q10, Q11 |
| 3 | PCAQ2012B-201T030 | Hatlabs:L_CommonModeChoke_PCAQ2012B | FL1, FL2, FL3 |
| 3 | RED LED | LED_SMD:LED_0603_1608Metric | D39, D41, D43 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R2, R30 |
| 2 | 10uF | Capacitor_SMD:C_1206_3216Metric | C22, C30 |
| 2 | 130k | Resistor_SMD:R_0603_1608Metric | R120, R137 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C39, C40 |
| 2 | 1nF | Capacitor_SMD:C_0402_1005Metric | C38, C188 |
| 2 | 1nF | Capacitor_SMD:C_0603_1608Metric | C180, C189 |
| 2 | 1nF/X1,Y2 | Hatlabs:C_1808_4520Metric | C147, C157 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R42, R43 |
| 2 | 3.3k | Resistor_SMD:R_0603_1608Metric | R3, R130 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C29, C37 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R98, R99 |
| 2 | 68k | Resistor_SMD:R_0603_1608Metric | R124, R126 |
| 2 | 74LVC1GU04 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U3, U4 |
| 2 | APH0630T2R2M | Inductor_SMD:L_Chilisin_BMRx00060630 | L3, L4 |
| 2 | B0505S-1WR3 | Hatlabs:SIP-4_L11.7-W6.0-P2.54_B0305S-1WR3 | PS1, PS2 |
| 2 | FFC-22p-P0.5mm | HL_Connector:FPC-SMD_22P-P0.50_XUNPU_FPC-05F-22PH20_REV_Horizontal | J15, J16 |
| 2 | FPC0.5-SMT-20P | HL_Connector:FPC-SMD_20P-P0.50_XUNPU_FPC-05F-20PH20_Horizontal | J17, J18 |
| 2 | HC-1.0-4PLT | Hatlabs:JST_SH_HCTL_HC-1.0-4PLT_1x04-1MP_P1.00mm_Vertical | J12, J13 |
| 2 | HCB3216KF-121T60 | Resistor_SMD:R_1206_3216Metric | FB1, FB2 |
| 2 | Jumper_2_Open | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP4 |
The 530 most common of 739 parts.
Questions
How big is the HALPI2 PCB?
It measures 187 × 109 mm and has 6 copper layers, 1.56 mm thick.
What parts does the HALPI2 use?
739 parts, built around the B0505S-1WR3, RCLAMP0524P, 74LVC1GU04GW and SMTSO2515CTJ. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the HALPI2 KiCad files?
From the hatlabs/HALPI2-hardware repository on GitHub, at the commit this page was made from: the board is HALPI2.kicad_pcb and its schematic CM4.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HALPI2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask hatlabs before reusing the design.
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