The International Cessna 170 Association

I have no affiliation with this company but saw this on another forum and it looks like an alternative to other ADS-B receiver units that sell for about 4 times as much. Some people have been building their own ADS-B receivers this is a kit you can buy.

https://www.openflightsolutions.com/

It's a project built on top of the OpenSource Stratux project which is completely free.
http://stratux.me/

You can buy all the parts on Amazon and they even give you the shopping list It's very easy to build. No soldering and there are places online that will 3D print you a case if you dont' have access to a 3D printer. Some libraries have 3D printers so you could also download the drawing files and print one yourself.

I've been playing with a free toy EFIS that would use Stratux data and sit on top with a 4" screen.
It's about the size of the Dynon D2. Since the project uses the RaspberryPi board, I coined it the Pi2D2
https://github.com/Bagarre/Pi2D2
https://raw.githubusercontent.com/Bagar ... 2Shot2.png

My stuff is more toy but the Stratux has strong support and they are very actively working on it.

I've just completed flight test of the basic stratux box all parts ordered from Amazon, total cost 109 bucks. It's working well I'm getting traffic and weather on the iPad. Over all I'm very satisfied, I will be upgrading it in the near future (fancy case, gps,and duel band)