4 layers92.7 × 83.8 mm
2 layers41 × 41.1 mm
Sensor logger
hsl25/Sensor-Logger-PCB1PCB design project - the sensor logger board features an IMU, temperature and humidity sensor, LCD screen and micro-SD card data storage.
- Size
- 41 × 41.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 60
- Nets
- 60
- Pads
- 217
- Tracks, vias
- 454, 89
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Aug 2026
- Updated
- 18 Sep 2026
Overview
Sensor logger is an open-source printed circuit board by hsl25, from the hsl25/Sensor-Logger-PCB repository on GitHub. It is a 2-layer board of 41 × 41.1 mm with 60 parts on 60 nets, routed with 454 tracks and 89 vias.
It is built around the STM32F411CEU6, SHT21 and LTST-C190KGKT, with the ASPI-4030S-120M-T, LTST-C191KRKT and MF-LSMF050X-2 among its other parts. Its parts include 22 capacitors, 16 resistors, 4 connectors, 3 ICs and 1 diode. It belongs with the sensors and measurement and lEDs and displays boards and the STM32 boards of this library.
Main components
10
STM32F411CEU6
UFQFPN-48(7x7)-40℃~+85℃ 1.7V~3.6V 100MHz 128KB 12bit 32 Bit 36 512KB ARM Cortex-M4 Built-in FLASH UFQFPN-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
SHT21
6-DFN (3x3)Humidity 0 - 100% RH and Temperature -40°C to +125°C Sensor (Digital output, I²C Interface)SensirionUncategorised
LTST-C190KGKT
0603-30℃~+85℃ 130° 20mA 2V 35mcd 567.5nm~576.5nm 574nm 75mW Discrete Diode Water Clear Yellow Green 0603 LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
ASPI-4030S-120M-T
SMD,4x4mm1.3A 1.7A 12uH 135mΩ ±20% SMD,4x4mm Power Inductors ROHSAbraconPower InductorsLTST-C191KRKT
0603-55℃~+85℃ 130° 20mA 2V 54mcd 631nm 639nm 75mW Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
MF-LSMF050X-2
29201.25mm 1.5W 1A 40A 4s 5.44mm 500mA 60V 7.98mm 2920 Resettable Fuses ROHSBournsResettable FusesMMZ1608B121CTAH0
0603-55℃~+125℃ 1 120Ω@100MHz 150mΩ 600mA ±25% 0603 Ferrite Beads ROHSTDKFerrite Beads
PESD5V0U1UA,115
SOD-323-55℃~+150℃@(Ta) 1 1.3A@8/20us 100nA 11V 2pF 5V 8.8V ESD IEC 61000-4-2 Unidirectional SOD-323 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)ST-LINK/V2
-- Programmers, Emulators, and Debuggers ROHSSTMicroelectronicsProgrammers, Emulators, And Debuggers
USB4125-GF-A-0190
SMD-30℃~+85℃ 1 20 thousand cycles 3A 48V 6P Black Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
README
README.mdSensor Logger PCB design project
The sensor logger board features an IMU, temperature and humidity sensor, LCD screen and micro-SD card data storage. It is a 2-layer board with the following layer stackup:
- Layer 1: Signal layer with majority of components. Includes +3V3 copper zones.
- Layer 2: Remainder of components and large unbroken GND copper zone.
The board is currently being manufactured and components have been ordered. Updates about soldering and firmware testing will follow. Please see the image below for a screenshot of the 3D view of the PCB.
Parts
60| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100n | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C6, C8, C15, C17, C18, C19, C22, C23 |
| 4 | 4.7k | Resistor_SMD:R_0805_2012Metric | R8, R9, R11, R12 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2, R10 |
| 3 | 330 | Resistor_SMD:R_0805_2012Metric | R13, R15, R16 |
| 3 | LTST-C190KGKT | sensor_lggr:LEDC1608X80N | FWST, LED3V3, LED5V |
| 2 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C13, C14 |
| 2 | 10u | Capacitor_SMD:C_1206_3216Metric | C16, C21 |
| 2 | 1u | Capacitor_SMD:C_0805_2012Metric | C9, C10 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 2.2u | Capacitor_SMD:C_0805_2012Metric | C12 |
| 1 | 22.1k | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 22u | Capacitor_SMD:C_1206_3216Metric | C11 |
| 1 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 51k | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric | R14 |
| 1 | ASM330LHHTR | sensor_lggr:IMU_LSM6DS3USTR | IC2 |
| 1 | ASPI-4030S-120M-T | sensor_lggr:ASPI-4030S | L1 |
| 1 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J2 |
| 1 | LOGO | sensor_lggr:logo | G*** |
| 1 | LOGO | sensor_lggr:rb1 | G*** |
| 1 | LTST-C191KRKT | sensor_lggr:LEDC1608X55N | ERROR |
| 1 | MF-LSMF050X-2 | sensor_lggr:MFLSMF050X2 | F1 |
| 1 | MMZ1608B121CTAH0 | sensor_lggr:BEADC1608X75N | FB1 |
| 1 | PESD5V0U1UA,115 | sensor_lggr:SOD2512X110N | D1 |
| 1 | SHT21 | sensor_lggr:SON100P300X300X110-7N-D | HM2 |
| 1 | ST-Link/V2 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J4 |
| 1 | STM32F411CEU6 | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | TPS560430X3FDBVR | sensor_lggr:SOT95P280X145-6N | IC1 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | USB4125-GF-A-0190 | sensor_lggr:USB4125GFA0190 | J1 |
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Questions
How big is the Sensor logger PCB?
It measures 41 × 41.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sensor logger use?
60 parts, built around the STM32F411CEU6, SHT21, LTST-C190KGKT and ASPI-4030S-120M-T. 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 Sensor logger KiCad files?
From the hsl25/Sensor-Logger-PCB repository on GitHub, at the commit this page was made from: the board is sensor_logger.kicad_pcb and its schematic data_storage.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor logger design in my own project?
Its repository states no licence, so its author keeps all rights: ask hsl25 before reusing the design.