2 layers112.4 × 74.2 mm
2 layers109.3 × 59.7 mm
Radiolarian
webmariner/Radiolarian3A flexible digital radio Hexpansion for the Tildagon
- Size
- 109.3 × 59.7 mm
- Copper layers
- 2
- Thickness
- 1.09 mm
- Parts
- 10
- Nets
- 36
- Pads
- 95
- Tracks, vias
- 245, 21
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Mar 2026
- Updated
- 28 Mar 2026
Overview
Radiolarian is an open-source printed circuit board by webmariner, from the webmariner/Radiolarian repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 109.3 × 59.7 mm with 10 parts on 36 nets, routed with 245 tracks and 21 vias.
It is built around the DMG2305UX-7 and M24128-UFMN6TP. Its parts include 2 capacitors, 2 resistors, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
2README
README.mdRadiolarian
A flexible open-source hardware expansion board for the EMF Tildagon badge supporting digital radio applications.
Design
The hexpansion is based on the Semtech SX1278 radio module, controlled via SPI by a Raspberry Pi Pico, which in turn can get commands from or send data to the badge via the I2C and other I/O lines on the edge connector. There's also an EEPROM on board sharing the I2C bus, so the badge can check the hexpansion identifier and (if desired) boot your custom software.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10nF | Capacitor_THT:C_Disc_D7.0mm_W2.5mm_P5.00mm | C1, C2 |
| 2 | 1k8 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 1 | Ai-Thinker-Ra-02 | components:ALR00002A | U1 |
| 1 | DMG2305UX-7 | Radiolarian:DMG2305UX-7-SOT-23_DIO | P-MOSFET1 |
| 1 | Hexpansion-Connector | Radiolarian:hexpansion-edge-connector | J1 |
| 1 | LOGO | components:echq | G*** |
| 1 | M24128-UFMN6TP | Radiolarian:M24128-UFMN6TP-SO-8_STM | EEPROM1 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_THT | A1 |
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Questions
How big is the Radiolarian PCB?
It measures 109.3 × 59.7 mm and has 2 copper layers, 1.09 mm thick.
What parts does the Radiolarian use?
10 parts, built around the DMG2305UX-7 and M24128-UFMN6TP. 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 Radiolarian KiCad files?
From the webmariner/Radiolarian repository on GitHub, at the commit this page was made from: the board is Radiolarian.kicad_pcb and its schematic Radiolarian.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Radiolarian design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).