D10A airspeed switch?

[Feetwet]

I have 2 D10A's, one with an attitude presentation, and the other with an HSI presentation. Both work fine, and one of them feeds serial altitude to my Trig TT31. I am considering an airspeed switch that closes to ground at 40mph for my adsb-out air-ground determination because the FAA algorithm that is supposed to do it using gps info and the serial altitude (@29.92) is highly suspect. It seems like the D10As already determine airspeed similar to an airspeed switch, with my 5.4 software I do not get airspeed indication until ~40mph. Is there any pin out from the D10As that could be used for this air ground switching purpose, ie that closes to ground as the airspeed hits about 40mph? Maybe a long shot, but one can only hope!
Thanks

 

[Dynon]

There isn't any pin-out that does what you're looking for, unfortunately. There's IAS in the serial stream that the D10A outputs, though, if you wanted to utilize that. Incidentally, you should see your IAS come alive earlier than 40mph. If memory serves, it should come alive at 20knots (~22mph).

 

[Feetwet]

Thanks for the help, I know it was a long shot. I think before I try an airspeed switch, I will try a finger switch, ie turn the TT31 to GND at startup, ALT on runway before takeoff, and back to GND on runway landing roll out. The trig install manual implies that is all an airspeed or squat switch is doing.