Capstone Project Proposal

For my capstone project, I want to build a digital multimode amateur radio repeater.

Amateur Radio is a two way radio service which in the United States is licensed by the Federal Communications Commission (FCC). It allows amateur radio operators the ability to talk to one another around the world using radio and to experiment with/design radio(s) and radio antennas. Amateur radio is often called “ham” radio. Ham radio is also used during natural disasters/emergencies to communicate when all other means of communication have failed.

I earned my Extra Class license about nine years ago. The Extra Class license is the highest license class that one can earn. While I’m not very active on the air talking to people, I enjoy the electronics and technology side of ham radio. More recently I have been working with digital repeaters, mainly Digital Smart Technology Amateur Radio (DSTAR) repeaters and occasionally Digital Mobile Radio (DMR) repeaters.

For my capstone I want to setup a multimode digital repeater that will switch between DSTAR and DMR depending on the signal it receives. This will be accomplished through the use of readily available software running on a Raspberry Pi that will be interfaced with a radio operating in the 70cm band.

The project will include a Nextion display to display information about the repeater and who is currently talking & allow one to control the repeater via touchscreen. I will design a screen layout for the Nextion display using Nextion Editor.

I will also add or enable a few extra features such as remote control through the ircDDBRemote app for DSTAR, remote SSH access, automatic linking based on a schedule, and possibly a few more as time permits.

I would like to learn how to design or modify and print a 3D printed case for my project too. 3D printing is something I have very limited experience with and would like to learn more about.

Hello World

Here I will be posting information about my capstone project related to amateur or ham radio. I’ll be putting together a multi-mode digital repeater supporting DSTAR and DMR.

I will be posting weekly status updates on the project as well as documentation on how I’ve set this up.

Tyler N3TDM