My submission to the Tiny Tapeout 07 VLSI chip fabrication project. I created a double balanced mixer.
- This page contains some details on the math.
The MicroLink Project is a from-scratch implementation of an EchoLink station on a $6 microcontroller.
A fixed-point C implementation of the GSM-0610 Full Rate audio CODEC. This is the original CODEC used in the 2G mobile telephone network in Europe. It is also used by EchoLink.
The LoRA Birdhouse Mesh Network Project is a low-power mesh network that runs on LoRA radios.
- Covered by the Blind Hams PodCast Episode
A hardware/software interface to the ODB2 vehicle diagnostic connector on your car.
- More detail on the hardware
The NanoVNA Controller Project is an HTML interface for the NanoVNA vector network analyzer.
- This was covered by the Blind Hams PodCast Episode given the accessibility aspects of this project.
I wrote a study guide for the FCC Ship Radar Endorsement Exam
- See also, some possible Errata on the FCC Exam

My Research Notes

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