4 layers100 × 75 mm
OpenAirScope
emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
282 parts26MIT
4 layers52.7 × 42.5 mm
OmniProbe
emertcakir/OmniProbe4Open-source SWD, JTAG, UART, SPI, I2C and Logic Analyzer platform powered by RP2040
- Size
- 52.7 × 42.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 125
- Pads
- 363
- Tracks, vias
- 550, 52
- Pours
- 59
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 7 Jun 2026
- Updated
- 28 Jun 2026
Overview
OmniProbe is an open-source printed circuit board by emertcakir, from the emertcakir/OmniProbe repository on GitHub, published under the MIT licence. It is a 4-layer board of 52.7 × 42.5 mm with 77 parts on 125 nets, routed with 550 tracks and 52 vias.
It is built around the RP2040, W25Q128JVPIQ and SN74LVC8T245PW, with the AP2112K-3.3, TPD2E2U06DCK and TXS0108EPW among its other parts. Its parts include 30 capacitors, 27 resistors, 7 ICs, 7 connectors and 3 diodes. It belongs with the interfaces and adapters and sensors and measurement boards and the RP2040 boards of this library.
Main components
9
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVPIQ
WSON-8-EP(5x6)-40℃~+85℃ 100,000 cycles 10uA 120ms@(32KB) 128Mbit 133MHz 2.7V~3.6V 20 Years Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection、Power lock protection SPI WSON-8-EP(5x6) NOR FLASH ROHSWinbond ElecNOR FLASH
SN74LVC8T245PW
TSSOP-24-40℃~+85℃ 1 1.65V~5.5V 1.65V~5.5V 8 Bidirectional CMOS CMOS Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
TPD2E2U06DCK
SC-70-3-40℃~+125℃ 1.5pF 10nA 12.4V 2 5.5A@8/20us 5.5V 6.5V 75W@8/20us Bidirectional IEC 61000-4-2、IEC 61000-4-5 TVS SC-70-3 ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
TXS0108EPW
TSSOP-20-40℃~+85℃ 1 1.4V~3.6V 1.65V~5.5V 60Mbps 8 Automatic direction detection、Output enable high-impedance、Integrated pull-up resistor Bidirectional Level translator Push-Pull、Open-drain TSSOP-20 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
MBR1020VL
SOD-123F-55℃~+125℃ 1 Independent 1A 20V 340mV@1A 45A 600uA@20V SOD-123F Schottky Diodes ROHSonsemiSchottky Diodes
PTVS5V0Z1USKYL
06031.2nF 18V 200W 20A 25nA 5V 6.4V TVS 0603 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
WS2812
SMD5050-4P1.57mm 1000mcd 110mcd 120us 2kHz 3.7V~5.3V 300ns 320mcd 451nm 523nm 5mm 5mm 623nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit Top-mount SMD5050-4P RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.mdOmniProbe
A Universal Open-Source Debugging and Signal Analysis Platform for Embedded Engineers
OmniProbe is an open-source hardware and firmware platform designed to simplify embedded system development, debugging, and protocol analysis.
Built around the RP2040 microcontroller, OmniProbe combines multiple engineering tools into a single compact device, reducing the need for separate adapters, analyzers, and interface boards.
Why OmniProbe?
Embedded developers often rely on multiple tools for debugging and communication:
- SWD Debug Probe
- USB-to-UART Adapter
- Logic Analyzer
- SPI Debug Tool
- I2C Interface
- GPIO Test Board
OmniProbe aims to bring all of these capabilities into a single open-source platform.
Key Features
Debugging Interfaces
- SWD Debugging
- JTAG Support
- CMSIS-DAP Compatible Firmware
Communication Interfaces
- USB to UART Bridge
- SPI Interface
- I2C Interface
- GPIO Access
Logic Analyzer
- Up to 16 Digital Channels
- RP2040 PIO-Based Sampling Engine
- Planned Sigrok / PulseView Integration
Multi-Voltage Operation
- 1.8V Support
- 3.3V Support
- 5V Support
- Bidirectional Level Shifting
Hardware Features
- USB Type-C Connectivity
- ESD Protection
- Polyfuse Protection
- EMI Filtering
- Reverse Polarity Protection
Hardware Architecture
The hardware architecture is divided into several independent modules:
- Power Management
- USB Type-C Interface
- RP2040 Core
- QSPI Flash Memory
- Level Shifting Subsystem
- Debug Interfaces
- Logic Analyzer Engine
- Protection Layer
This modular architecture allows future expansion without redesigning the entire system.
Project Goals
- Open-Source Hardware
- Open-Source Firmware
- Professional Development Tool
- Affordable Manufacturing Cost
- Maker-Friendly Design
- Educational Value
- Extensible Architecture
Repository Structure
OmniProbe/
├── docs/
├── hardware/
├── firmware/
├── software/
├── tests/
└── assets/Current Status
Project Phase: System Architecture & Hardware Design
OmniProbe is currently in the hardware architecture and schematic design phase. The project is being developed as a fully open-source platform, including hardware design files, documentation, and firmware sources.
The first release focuses on establishing a reliable and extensible foundation for debugging, protocol analysis, and embedded development workflows.
Future updates will expand functionality, improve performance, and introduce additional protocol support while maintaining compatibility with the existing hardware platform.
Open Hardware
All design files, schematics, PCB layouts, BOMs, and firmware sources will be publicly available.
The objective of OmniProbe is not only to provide a useful engineering tool, but also to serve as a learning resource for hardware and embedded system developers.
Contributing
Contributions, design reviews, bug reports, feature requests, and pull requests are welcome.
License
MIT License
Disclaimer
OmniProbe is currently under active development. Hardware and firmware specifications may change before the first stable release.
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 47R | Resistor_SMD:R_0603_1608Metric | R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 |
| 11 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C22, C23, C24, C25, C26, C38, C39, C40, C41 |
| 9 | 100nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C27, C28, C31, C32, C33, C34, C35, C36, C37 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R21, R23, R25, R26 |
| 3 | 0R | Resistor_SMD:R_0603_1608Metric | R22, R24, R27 |
| 3 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C4, C18 |
| 2 | 15pF | Capacitor_SMD:C_0402_1005Metric | C19, C20 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C21 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C29, C30 |
| 2 | 47pF | Capacitor_SMD:C_0603_1608Metric | C5, C6 |
| 2 | Conn_01x04_Socket | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J9, J10 |
| 2 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J2, J5 |
| 2 | SN74LVC8T245 | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U6, U7 |
| 1 | 12MHz | Crystal:Crystal_SMD_Abracon_ABM10-4Pin_2.5x2.0mm | Y1 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 6V/0.5A/1A | PCM_SparkFun-Fuse:0805 | F1 |
| 1 | AP2112K-3.3 | PCM_SparkFun-Semiconductor-Standard:SOT23-5 | U3 |
| 1 | Conn_01x06_Socket | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J4 |
| 1 | Conn_01x20_Socket | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J3 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | MBR1020VL | Diode_SMD:D_SOD-123F | D3 |
| 1 | PTVS5V0Z1USK | Diode_SMD:Nexperia_DSN1608-2_1.6x0.8mm | D2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm_ThermalVias | U1 |
| 1 | TPD2E2U06DCK | Package_TO_SOT_SMD:SOT-323_SC-70 | U5 |
| 1 | TXS0108EPW | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | W25Q128JVP | Package_SON:WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm | U2 |
| 1 | WS2812 | LED_SMD:LED_WS2812_PLCC6_5.0x5.0mm_P1.6mm | D1 |
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Questions
How big is the OmniProbe PCB?
It measures 52.7 × 42.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the OmniProbe use?
77 parts, built around the RP2040, W25Q128JVPIQ, SN74LVC8T245PW and AP2112K-3.3. 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 OmniProbe KiCad files?
From the emertcakir/OmniProbe repository on GitHub, at the commit this page was made from: the board is hardware/OmniProbe/OmniProbe.kicad_pcb and its schematic hardware/OmniProbe/OmniProbe.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OmniProbe 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).