NodePilot – CM108-Based AllStarLink Radio Interface

NodePilot is a compact, reliable, and isolated AllStarLink radio interface based on the CM108 audio USB chipset by S21TIP.

This project was designed for both personal use and small-scale production, with a focus on audio quality, RF robustness, and hardware protection.

Channel Driver to used with ASL3: Simpleusb

The complete KiCad schematic, PCB, and design files are publicly available under the CC-BY-SA-4.0 license.

Notes: If you are using buck converters to power Raspberry Pi boards, make sure the switching frequency is greater than 1 MHz for clean audio interfacing. Low-cost converters are often a significant source of RFI, although this circuit can eliminate most of it.

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🔧 Features

✔️ CM108 Frontend Protection
✔️ Full Audio Isolation
✔️ Compact & Modular
✔️ Open Hardware

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𖤓 Schematic

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📐 PCB

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📜 License

This project is released under the Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0) license.
You are free to remix, adapt, and build upon the design, even commercially, as long as you credit the author and share derivative works under the same license.

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📡 Author

Tushar Roy – S21TIP

If you improve the design or build your own version, feel free to open an Issue or Pull Request!

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🌐 Links

🔗 QRZ Page

https://www.qrz.com/db/S21TIP

🔗 Radiosanda FB Page

https://www.facebook.com/share/1FPaPZSuz1/