4 layers90.8 × 58.8 mm
HALSER
hatlabs/HALSER-hardware
Hat Labs Serial Interface Device hardware design files
199 partsCC-BY-4.0
4 layers89 × 58 mm
HALMET
hatlabs/HALMET-hardware8Hat Labs Marine Engine & Tank interface hardware design files
- Size
- 89 × 58 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 227
- Nets
- 142
- Pads
- 627
- Tracks, vias
- 1,395, 333
- Pours
- 1,136
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Nov 2023
- Updated
- 28 Oct 2026
Overview
HALMET is an open-source printed circuit board by hatlabs, from the hatlabs/HALMET-hardware repository on GitHub, published under the CC-BY-4.0 licence. It is a 4-layer board of 89 × 58 mm with 227 parts on 142 nets, routed with 1,395 tracks and 333 vias.
It is built around the 74LVC1G17Z, CH340C and ESP32-WROOM-32E-N16, with the SN65HVD230DR, B0305S-1WR3 and ADS1115IDGS among its other parts. Its parts include 71 capacitors, 46 resistors, 27 diodes, 17 connectors and 12 ICs. It belongs with the interfaces and adapters boards and the ESP32 boards of this library.
Main components
12
74LVC1G17Z
SOT-553-40℃~+125℃ 1 1 1.65V~5.5V 10uA 32mA 32mA 4.4ns@5V,15pF 74LVC Push-pull Schmitt trigger Unidirectional SOT-553 Buffers, Drivers, Receivers, Transceivers ROHSDiodes IncorporatedBuffers, Drivers, Receivers, Transceivers
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32E-N16
WIFI-SMD-40℃~+85℃ -98dBm 112mA 2.4GHz 20dBm 239mA 3V~3.6V Bluetooth4.2 ESP32-DOWD-V3 On-board PCB Antenna UART、SDIO、SPI、I2C、GPIO、ADC、DAC、Ethernet、TWAI SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SN65HVD230DR
SOP-8CAN TransceiversTokmas
B0305S-1WR3
SIP,11.7x6mm-40℃~+105℃ 1 1.5kV 10.2mm 11.68mm 1W 2.97V~3.63V 200kHz~340kHz 200mA 2400uF 30mVp-p 5V 6mA 6mm 78% Short Circuit Protection 塑封型 非稳压型 SIP,11.7x6mm Isolated Power Modules ROHSEVISUNIsolated Power Modules
ADS1115IDGS
MSOP10Ultra-Small, Low-Power, 4 Channels 16-Bit Analog-to-Digital Converter with Internal ReferenceTexas InstrumentsUncategorised
LMV324
SOP-14-40℃~+85℃ 1MHz 2.8dB 250nA 3V~5.5V 4 400V/ms 40mA 40uV/√Hz@1kHz 430uA 5nA 7mV Built-in compensation、ESD protection SOP-14 Operational Amplifier ROHSIDCHIPOperational AmplifierXL1509-3.3
SOP-8-40℃~+125℃@(TJ) 1 150kHz 2A 2mA 3.3V 4.5V~40V Buck Buck Built-in Fixed No SOP-8 DC-DC Converters ROHSUMWDC-DC ConvertersISO1540D
SOIC-8-40℃~+125℃ 2500 50kV/us Bidirectional Bidirectional automatic direction、Open-drain buffer output SOIC-8 I2C Isolators ROHSTexas InstrumentsI2C Isolators
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsBAT54S
SOT-231 Pair Series Connection 1V@100mA 200mA 2uA@25V 30V 600mA SOT-23 Schottky Diodes ROHSMDDSchottky 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)
README
README.mdHat Labs Marine Engine/Tank Interface
This repository contains the Hat Labs Marine Engine/Tank Interface (HALMET) hardware design. HALMET is a powerful microcontroller development board designed for marine environments with a focus on engine and tank monitoring.
HALMET can be used to easily create different types of sensors and control devices for boats. Use scenarios include:
- RPM sensors
- tank level sensors
- bilge sensors
- Engine alarm sensors
- Engine temperature sensors
Since the board has native WiFi and NMEA 2000 compatible CAN bus connectivity, it can be used to create boards with either Signal K or native NMEA 2000 connectivity (or both!).
Features
The main design features include:
- Built around ESP32, a powerful 32-bit microcontroller with 4 MB of flash
- Wide-range 6-32 V power input with surge protection
- NMEA 2000 compatible CAN interface (4-pin pluggable terminal block screw connector)
- 4 analog inputs with 0-32V input range and 16-bit resolution (2-pin pluggable terminal block screw connectors)
- 4 digital inputs with -32-32V input range, Schmitt triggered logic level threshold at 1.5V (2-pin pluggable terminal block screw connectors)
- 1-Wire interface (3-pin 2.54 mm header)
- I2C interface with both a SparkFun Qwiic connector and a 4-pin 2.54 mm header
- USB interface for programming and serial communication (USB Micro B)
- All above interfaces with proper electromagnetic compatibilty (EMC) design -- the device won't interfere with navigational devices or radio equipment
- All available general-purpose input/output (GPIO) pins broken out to a separate header
- Board designed to fit low-cost waterproof 100x68x50 mm enclosures
Rendering of a version 1.0.0 board:
Getting HALMET
HALMET will be available for purchase at the Hat Labs web store.
Documentation
HALMET documentation will be available at the project GitHub Pages.
Parts
227| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 100nF | Capacitor_SMD:C_0402_1005Metric | C602, C606, C607, C608, C609, C610, C624, C901, C1113, C1114, C1115, C1116, C1204, C1205, C1206, C1207 |
| 13 | SolderJumper_2_Open | HALMET:SolderJumper-2_P1.3mm_Open_TrianglePad_Narrow | JP601, JP1101, JP1102, JP1103, JP1104, JP1105, JP1106, JP1107, JP1108, JP1109, JP1110, JP1111, JP1112 |
| 9 | 10uF/50V | Capacitor_SMD:C_1206_3216Metric | C704, C707, C708, C709, C710, C711, C712, C714, C803 |
| 8 | 20k | Resistor_SMD:R_0603_1608Metric | R613, R614, R616, R618, R1101, R1102, R1104, R1105 |
| 8 | BAT54S | Package_TO_SOT_SMD:SOT-323_SC-70 | D603, D604, D605, D611, D1103, D1104, D1105, D1113 |
| 8 | Conn_01x02 | Connector_Phoenix_MC:PhoenixContact_MCV_1,5_2-G-3.81_1x02_P3.81mm_Vertical | J604, J605, J606, J607, J1103, J1104, J1105, J1106 |
| 8 | ESD5451N | Diode_SMD:D_0402_1005Metric | D401, D402, D403, D503, D504, D903, D904, D905 |
| 7 | 10k | Resistor_SMD:R_0402_1005Metric | R201, R213, R401, R402, R503, R612, R1103 |
| 6 | 2k | Resistor_SMD:R_0402_1005Metric | R501, R502, R701, R702, R1202, R1203 |
| 6 | 33pF | Capacitor_SMD:C_0402_1005Metric | C603, C605, C613, C615, C702, C703 |
| 6 | 33pF/50V | Capacitor_SMD:C_0603_1608Metric | C601, C604, C612, C614, C705, C706 |
| 6 | GZ2012D101TF | Inductor_SMD:L_0805_2012Metric | FB601, FB602, FB603, FB604, FB702, FB703 |
| 5 | 1k | Resistor_SMD:R_0402_1005Metric | R603, R604, R605, R606, R611 |
| 5 | 2.2k | Resistor_SMD:R_0402_1005Metric | R615, R617, R619, R621, R801 |
| 4 | 100k | Resistor_SMD:R_0402_1005Metric | R1106, R1107, R1108, R1109 |
| 4 | 10nF | Capacitor_SMD:C_0402_1005Metric | C620, C621, C622, C623 |
| 4 | 220pF | Resistor_SMD:R_0402_1005Metric | C1104, C1105, C1106, C1107 |
| 4 | 3.3nF | Capacitor_SMD:C_0402_1005Metric | C1101, C1102, C1103, C1112 |
| 4 | 30 | Resistor_SMD:R_0603_1608Metric | R607, R608, R609, R610 |
| 4 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C1201, C1202, C1208, C1210 |
| 4 | 74LVC1G17 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U1101, U1102, U1103, U1104 |
| 4 | BC856BW,115 | Package_TO_SOT_SMD:SOT-323_SC-70 | Q601, Q602, Q603, Q604 |
| 4 | GZ2012D601TF | Inductor_SMD:L_0805_2012Metric | FB401, FB701, FB704, FB801 |
| 3 | B5819W | Diode_SMD:D_SOD-123 | D201, D303, D701 |
| 3 | Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP602, JP604, JP605 |
| 2 | 1.5k | Resistor_SMD:R_0402_1005Metric | R1001, R1002 |
| 2 | 100nF/50V | Capacitor_SMD:C_0603_1608Metric | C501, C502 |
| 2 | 10pF/50V | Capacitor_SMD:C_0402_1005Metric | C403, C404 |
| 2 | 10uF | Capacitor_SMD:C_0402_1005Metric | C701, C801 |
| 2 | 1uF/50V | Capacitor_SMD:C_0805_2012Metric | C503, C715 |
| 2 | 240R | Resistor_SMD:R_0805_2012Metric | R601, R602 |
| 2 | BAT54A | Package_TO_SOT_SMD:SOT-323_SC-70 | D1101, D1102 |
| 2 | CMH201209B4R7MT | Inductor_SMD:L_0805_2012Metric | L1201, L1202 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J302, J1201 |
| 2 | GREEN LED | LED_SMD:LED_0603_1608Metric | D1001, D1002 |
| 2 | MountingHole | HALMET:MountingSlot_3.2mm_M3_Unplated | H1001, H1002 |
| 2 | S8050 | Package_TO_SOT_SMD:SOT-23 | Q401, Q402 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_TL3342 | SW501, SW502 |
| 1 | 100R | Resistor_SMD:R_0805_2012Metric | R802 |
| 1 | 10uF/10V | Capacitor_SMD:C_0603_1608Metric | C1203 |
| 1 | 1nF/50V | Capacitor_SMD:C_0603_1608Metric | C802 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C203 |
| 1 | 220pF/2kV | HALMET:C_1808_4520Metric | C1209 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C202 |
| 1 | 330R | Resistor_SMD:R_0402_1005Metric | R1201 |
| 1 | 4.7R | Resistor_SMD:R_0603_1608Metric | R703 |
| 1 | 4.7nF/50V | Capacitor_SMD:C_0402_1005Metric | C713 |
| 1 | 4.7uF/16V | Capacitor_SMD:C_0603_1608Metric | C402 |
| 1 | 4.7uF/50V | Capacitor_SMD:C_1206_3216Metric | C716 |
| 1 | 47uF/6.3V | Capacitor_SMD:C_1206_3216Metric | C304 |
| 1 | 68nF | Capacitor_SMD:C_0603_1608Metric | C611 |
| 1 | ADS1115IDGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U602 |
| 1 | B0305S-1WR3 | Converter_DCDC:Converter_DCDC_Murata_MEE1SxxxxSC_THT | PS1201 |
| 1 | BLUE LED | LED_SMD:LED_0603_1608Metric | D501 |
| 1 | BSMD1206-100-6V | Fuse:Fuse_1206_3216Metric | F401 |
| 1 | Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm | JP603 |
| 1 | CC-BY | HALMET:cc-by_5mm | G601 |
| 1 | CE-logo | Symbol:CE-Logo_11.2x8mm_SilkScreen | G602 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U401 |
| 1 | Conn_01x01 | TestPoint:TestPoint_Pad_D2.0mm | J203 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J801 |
| 1 | Conn_01x04 | Connector_Phoenix_MC:PhoenixContact_MCV_1,5_4-G-3.81_1x04_P3.81mm_Vertical | J802 |
| 1 | Conn_01x04 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J702 |
| 1 | Conn_02x04_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J602 |
| 1 | ESP32-WROOM-32E-N16 | RF_Module:ESP32-WROOM-32 | U201 |
| 1 | GPIO | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Vertical | J201 |
| 1 | HL-Logo | HALMET:Hat_Labs_25.4mm | G605 |
| 1 | HL-Pictogram | HALMET:HaL_picto_8mm | G701 |
| 1 | ISO1540 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1202 |
| 1 | LMV324 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U601 |
| 1 | NLCV32T-100K-EFR | Inductor_SMD:L_1210_3225Metric | L701 |
| 1 | RED LED | LED_SMD:LED_0603_1608Metric | D502 |
| 1 | SM24CANB | Package_TO_SOT_SMD:SOT-23 | D801 |
| 1 | SMBJ33CA | Diode_SMD:D_SMB | D301 |
| 1 | SMMS0650-470M | HALMET:SMMS0650-1R0M | L301 |
| 1 | SN65HVD230DR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U501 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Wuerth_614105150721_Vertical | J401 |
| 1 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23-3 | U1203 |
| 1 | XL1509-3.3 | Package_SO:SOP-8_3.9x4.9mm_P1.27mm | U202 |
| 1 | mSMD050-60V | Fuse:Fuse_1812_4532Metric | F301 |
The 221 most common of 227 parts.
Questions
How big is the HALMET PCB?
It measures 89 × 58 mm and has 4 copper layers, 1.6 mm thick.
What parts does the HALMET use?
227 parts, built around the 74LVC1G17Z, CH340C, ESP32-WROOM-32E-N16 and SN65HVD230DR. 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 HALMET KiCad files?
From the hatlabs/HALMET-hardware repository on GitHub, at the commit this page was made from: the board is HALMET.kicad_pcb and its schematic ESP32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HALMET design in my own project?
Its repository publishes it under the CC-BY-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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