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The 3.5 mm jack footprint from the standard KiCAD library had to be modified. The PCB edge was moved 0.85 mm outward to match the C62 connector and PCB layout. |
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| parts | ||
| photos | ||
| .gitattributes | ||
| .gitignore | ||
| audio.kicad_sch | ||
| connectors.kicad_sch | ||
| display.kicad_sch | ||
| fp-lib-table | ||
| keyboard.kicad_sch | ||
| LICENSE.txt | ||
| linht-hw.kicad_pcb | ||
| linht-hw.kicad_pro | ||
| linht-hw.kicad_sch | ||
| linht-hw.pdf | ||
| mcm-imx93-pinout.md | ||
| mux.kicad_sch | ||
| power.kicad_sch | ||
| README.md | ||
| rf.kicad_sch | ||
| soc.kicad_sch | ||
| sym-lib-table | ||
LinHT-hw
Open-source hardware, Linux-based, SDR handheld transceiver. OpenHT successor with greatly simplified hardware - no FPGAs involved. This project offers a replacement board for the Retevis C62 radio, greatly expanding its capabilities.
Hardware
The device uses an MCM-iMX93 System on Module (SoM) running Linux. The RF front-end is based on the Semtech SX1255. The chip is used as a complete IQ modulator/demodulator, allowing for true all-mode support.
Resources
CPU:
- Dual-core ARM Cortex-A55 @ 1.7GHz
- ARM Cortex-M33 coprocessor @ 250MHz
- Floating Point Unit
- ARM Ethos U-65 microNPU (Neural Processing Unit with Tensor Flow Lite support)
Memory:
- 2GB LPDDR4
- 64GB eMMC
RF:
- 500kHz bandwidth complete IQ transceiver
Software
Developers can use C/C++/Python as well as (or in conjunction with) GNU Radio flowgraphs. Tools such as gcc are built-in. The Linux image will be published later.
Supported modes (so far):
- M17 - transmission and reception,
- TETRA - reception only,
- Demo 64QAM transmission at 2Mbps
Other modes can be added later (analog FM/AM/SSB, FreeDV, APRS, etc.).
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
