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SensBoard
Hazel-H-Chen/PocketSens1Microcontroller based sensor suite for portable environmental measurements.
- Size
- 50 × 80 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 57
- Pads
- 234
- Tracks, vias
- 464, 40
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Mar 2026
- Updated
- 18 Mar 2026
Overview
SensBoard is an open-source printed circuit board by Hazel-H-Chen, from the Hazel-H-Chen/PocketSens repository on GitHub, published under the MIT licence. It is a 4-layer board of 50 × 80 mm with 62 parts on 57 nets, routed with 464 tracks and 40 vias.
It is built around the ATSAMD21E18A-MF, AS3935-BQFT and BME680, with the BMP390, MLX90614ESF-BAA-000-TU and AP2112K-3.3 among its other parts. Its parts include 17 capacitors, 16 resistors, 11 ICs, 5 diodes and 5 connectors. It belongs with the sensors and measurement boards and the SAM D and SAM boards of this library.
Main components
11
ATSAMD21E18A-MF
VFQFN-32-EP(5x5)-40℃~+125℃ 1.62V~3.6V 256KB 26 32 Bit 32KB 48MHz ARM Cortex-M0+ Built-in FLASH VFQFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
AS3935-BQFT
MLPQ-16(4x4)Lightning Sensor Low-power mode、Interrupt output、Auto calibration、Threshold detection/alarm function MLPQ-16(4x4) Specialized Sensors ROHSSciosenseSpecialized Sensors
BME680
LGA-8-40℃~+85℃ 0.12hpa 0.6hpa 1.3pa/K 1.71V~3.6V 150nA 30Kpa~1.1bar I2C、SPI Temperature Sensor LGA-8 Pressure Sensors ROHSBosch SensortecPressure Sensors
BMP390
LGA-10(2x2)-40℃~+85℃ 0.6pa/K 1.5uA 1.65V~3.6V 30Kpa~1.25bar 3pa 50pa I2C、SPI Integrated ADC and digital interface、Standby mode、On-chip temperature output Yes LGA-10(2x2) Pressure Sensors ROHSBosch SensortecPressure Sensors
MLX90614ESF-BAA-000-TU
TO-39-4-40℃~+85℃ 10bit 2.6V~3.6V 6uA SMBus ±0.5℃ TO-39-4 Temperature Sensors ROHSMelexisTemperature Sensors
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
TSOP6238TT
SMD-4P,7.5x5.3mm-25℃~+85℃ 10mW 18m 2.5V~5.5V 38kHz 700uA ±50° SMD-4P,7.5x5.3mm Infrared Remote Receiver (IRM) ROHSVishay IntertechnologyInfrared Remote Receiver (IRM)
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs12402012E212A
SMD1 5A Female Type-C USB 2.0 SMD USB Connectors ROHSAmphenolUSB Connectors
JS202011JAQN
SMD-40℃~+85℃ 300mA 5,000 cycles 6V DPDT J-Lead Rectangular Columnar Surface Mount, Right Angle SMD Slide Switches ROHSC&KSlide Switches
MA5532-AEB
SMD,11.7X3.5mmSMD,11.7x3.5mm New Arrivals ROHSCoilcraftUncategorised
README
README.mdPocketSens Portable Sensor Suite
PocketSens is a portable environmental sensor platform designed to measure environmental and physical data beyond the capabilities of a typical smartphone. The system integrates multiple sensors on a custom four layer PCB and provides real time measurements through a small OLED display and rotary encoder interface.
Overview
PocketSens is built around an ARM Cortex M0+ SAMD21 microcontroller and communicates with several sensors over an I²C bus. The device collects environmental measurements and displays them directly on the device, allowing users to monitor conditions in real time.
The system is designed as a compact handheld tool capable of measuring atmospheric and environmental parameters in a single portable device.
Sensors
The device integrates several sensors including:
- BME680 environmental sensor gas, humidity, pressure, temperature
- BMP390 barometric pressure sensor
- MLX90614 infrared temperature sensor
- AS3935 lightning detection sensor
Together these sensors allow the device to measure a wide range of environmental conditions in real time.
Hardware
- Custom four layer PCB designed in KiCad
- ARM Cortex M0+ SAMD21 microcontroller
- OLED display for live data output
- Rotary encoder for user interface
- I²C sensor bus architecture
Features
- Multi sensor environmental monitoring
- Real time data display on OLED screen
- Lightning detection capability
- Infrared temperature sensing
- Compact portable design
Repository Contents
pcb/ KiCad schematic and PCB layout files
images/ Board photos and layout screenshots
docs/ Additional design notes and documentation
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7, C13, C14, C15, C16 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C8, C12, C17 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C9, C11 |
| 4 | LED | LED_SMD:LED_PLCC_2835 | D1, D2, D3, D5 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R13, R17, R19 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R14, R18 |
| 2 | 20 | Resistor_SMD:R_0603_1608Metric | R20, R21 |
| 2 | 30 | Resistor_SMD:R_2512_6332Metric | R15, R16 |
| 2 | 4.7K | Resistor_SMD:R_0603_1608Metric | R1, R3 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R2, R11 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | Mounting Hole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | J2, J3 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R12 |
| 1 | 12402012E212A | Snapeda:AMPHENOL_12402012E212A | J1 |
| 1 | 1nF | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | AS3935-BQFT | My Footprint Library:QFN65P400X400X80-17N | U6 |
| 1 | ATSAMD21E18A-M | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm | U4 |
| 1 | BME680 | My Footprint Library:PSON80P300X300X100-8N | U9 |
| 1 | BMP390 | My Footprint Library:10LGA_2X2X0p75_BOS | U1 |
| 1 | JS202011JAQN | My Footprint Library:JS202011JAQN_CNK | SW1 |
| 1 | Left Button | My Footprint Library:SW2_KSS341GLFS_CNK | SW4 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MLX90614ESF-BAA-000-TU | My Footprint Library:TO254P942H425-4 | U5 |
| 1 | Right Button | My Footprint Library:SW2_KSS341GLFS_CNK | SW3 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW2 |
| 1 | SWC | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J7 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J6 |
| 1 | SW_SPST | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | Reset1 |
| 1 | Status | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | TSOP6238TT | My Footprint Library:SOJ_6238TT_VIS-M | U10 |
| 1 | ma5532 | My Footprint Library:MA5532-AE | L1 |
| 1 | ~ | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | U7 |
| 1 | ~ | My Footprint Library:128x64OLED | U8 |
| 1 | ~ | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | U11 |
Questions
How big is the SensBoard PCB?
It measures 50 × 80 mm and has 4 copper layers, 1.6 mm thick.
What parts does the SensBoard use?
62 parts, built around the ATSAMD21E18A-MF, AS3935-BQFT, BME680 and BMP390. 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 SensBoard KiCad files?
From the Hazel-H-Chen/PocketSens repository on GitHub, at the commit this page was made from: the board is pcb/SensBoard.kicad_pcb and its schematic pcb/SensBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SensBoard design in my own project?
Its repository publishes it under the MIT 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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