Okay. I've been in contact with some folks developing ADS-B In receivers and the associated software. Providing NMEA serial output for ADS-B traffic (specifically PFLAA and GPRMC sentences) is now on the development list for Stratux - which is the open-source software project for ADS-B In. It will allow you to connect your glider flight computer to any of the inexpensive single or dual-band ADS-B receivers based on Raspberry Pi.

I have also take with one of the commercial hardware developers for ADS-B In receivers - FlightBox. They will have a product out this spring for $150-250 for UAT only and UAT/1090ES respectively. You should also be able to pick up TIS-B - either what's intended for other aircraft near you, or tailored for you if you have ADS-B Out. I have not yet figured out exactly how to configure ADS-B Out to get the correct TIS-B traffic - but that should be just setting parameters. Since I don't have a way to do ADS-B Out yet that is a future project.

It requires a little work to add a serial port to the hardware so I'm trying to figure out how to get that done too. If there were enough interest I suspect it could get manufactured professionally rather than being a home electronics project.

If you want to use it standalone it should work as-is, but you could also use it with Flarm or PowerFlarm and use a K6Mux to combine the NMEA traffic streams and connect to a glide computer serial port.

I'd be interested in whether people have an interest in such a device - I suspect Dan does. Any others?

References:

https://www.kickstarter.com/projects...b-receiver-kit

http://stratux.me

http://www.cumulus-soaring.com/k6.htm

9B