Raspberry Pi Hat for SVXLink
This repository contains the code and instructions for a custom interface between radio transceivers and a Raspberry Pi running SVXLink.
The repository contains the following files and directories:
- c14_rpi_svxlink_if.kicad_pcb: the KiCAD project for the custom PCB design.
- LICENSE.md: the license file for the repository (CC-BY-SA).
- README.md: this file.
The interface offers the following features:
- Generic DB9 connector for interfacing to transceiver(s)
- Isolated audio rx/tx and signal paths (PTT, Squelch)
- Audio levels can be set with potis
- Fan control output and tacho input
- Telemetry inputs:
- ADS1115 ADC (i.e. for voltage or RSSI measurement)
- I2C connectors (i.e. for temperature sensors)
We deliberately decided against placing a soundcard IC on the interface. We use an external, generic USB soundcard instead, as these type of soundcards are very easy and cheap to get on various market places.
| Number | Name |
|---|---|
| 1 | SQL_DET- |
| 2 | SQL_DET+ |
| 3 | RSSI |
| 4 | RX_AUDIO- |
| 5 | RX_AUDIO+ |
| 6 | PTT_GND |
| 7 | PTT+ |
| 8 | TX_AUDIO- |
| 9 | TX_AUDIO+ |
| GPIO | Pin | Function |
|---|---|---|
| GPIO17 | 11 | PTT |
| GPIO22 | 15 | SQL Det. |
| GPIO18 | 12 | Fan Ctrl |
| GPIO24 | 18 | Fan Tacho |
| JP | Function |
|---|---|
| JP1 | Bypass PWM (always on) |
| JP2 | Enable clipping diodes |
An example project which uses this board can be found at https://charly14.de/svxlink-installation-und-konfiguration/
This repository is licensed under the CC-BY-SA. See the LICENSE file for details.
Concept ist based on the SVXLink Interface by Aleksander, S65AL