Combining signals for display and action

tldavis11

New Member
Joined
Dec 4, 2024
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2
I’m surprised to see that I can’t seem to do anything to combine signals or do any math with them before displaying on the screen or to trigger an alert. There are a few things I would do immediately if I could:

1) I have fuel sensors both at the inboard and at the outboard edge of my long tanks on a dihedral. I’d like to calibrate them separately (there’s a little overlap in levels) and then do some math to produce fuel level, or alert if the 2 are nonsensical (the outboard one could get stuck up for example). As is I’d have to combine those signals before plugging them in.

2) Stall warning AoA can be made dependent on flap position throughout the flap range. Whether that’s wise is a question perhaps, but I would think about it.

3) many things could be done with oxygen system sensing, blood O2 monitor, pressure altitude, cabin temperature, heat, lights, etc. that might be experimental but might also prove useful, especially for smart alerts.

Am I correct in asserting that the Skyview doesn’t do any kind of math on inputs other than scaling? Why can’t I combine my 2 fuel gauges from 1 tank?

This seems like a functionality no-brainer to me. I would have thought I’d have access to a Python interpreter and all the input pins, and also be able to assert warnings based on a value derived from inputs. I do this at home.

Without it I may have to build my own hardware interface, and it would not likely have the same robustness of hardware design. A non-hardened rpi for instance may fall apart in turbulence.

What say Dynon? Math or no math?
 

Rhino

Well-Known Member
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Jul 20, 2009
Messages
1,559
If you really want to ask Dynon a question, this isn't a good place to do it. This is a user forum, that they only occasionally check. Best to contact them if you have a specific question for them.
 

Marc_J._Zeitlin

Active Member
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Sep 24, 2007
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325
Location
Tehachapi, CA 93561
What say Dynon? Math or no math?
All of your suggestions are good ones, but no can do. I've had to do simple contact level combining (AND/OR gates) prior to the input line to the EMS.

There also aren't NEAR enough inputs for modern aircraft - I've long since run out, but I'm too cheap to buy a 2nd EMS just for the inputs, since I only have one engine.
 

tldavis11

New Member
Joined
Dec 4, 2024
Messages
2
Thanks. I was afraid I was right. Maybe there’s a way to design a diy input management system (for non-critical items) that can talk on the bus and provide processed inputs for display, and can receive responses from the screen interface. I haven’t read the docs enough to know if something like that can be made to work in reasonable time by a capable hobbyist. Has anyone done that?
 
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