Vern: have you considered this form factor for the arduino based power control module?
https://www.ardu-ecu.com/arduecu-mk1u
I building an RV-12iS as an EAB and was considering using this for stuff like flaps, fuel flow etc.
Digging thru your code is going to make this process so much easier, and for that I am very appreciative.
Sorry if I didn't properly response to this suggestion previously. If you go all the way back in this thread, you will see the original Arduino (ATMega or Teensy) design that I have release as open source. It was tuned for aircraft applications and I fly behind one programmed as an auto-trim and flaps controller. It fits into a standard off-the-shelf Hammond case. It uses all through-hole devices so it can easily be built or modified.
Then I developed a surface mount version and switched to the awesome ESP-32 controller. Again it fits into a standard Hammond case.
Finally, I used the off-the-shelf M5Stack display module, which contains the ESP-32, common interfaces, an optional IMU and a bright 320x240 TFT Color display in a compact package.... with a retail price less than my cost to build my other boards. My focus now is to develop custom 'shields' (such as the power/data board).
For those monitoring this thread, the next shield will be for 24 volt applications. Design is done, waiting to gauge demand.
We've finalized the M5Stack panel mounts, and in my next aircraft I will be mounting six or eight of them on the panel as programmable instruments and copilot displays running my graphical widgets library.
In the meantime, I will be installing my OnSpeed brain box in my Harmon Rocket and tweaking my back-seat EFIS display, building my RV-15 clone, and getting ready to move to my new hangar at
www.blueheronaeropark.com.
I'm always looking for new applications to code or for hardware development, so I welcome suggestions. I am doing this entirely for non-commercial (translation: I do whatever I want, whenever I have time) purposes to further the advancement of our industry. Everything will be released as open source, and posted at
www.huvver.tech, but only after complete flight testing.
Finally, I want to give a shout-out to Rob Prior for the 3d printed parts and has contributed his time and expenses to this project. As we electrical folks say, “the electrical design is easy, it's the mechanical stuff that's hard’”. Funny, though I've never heard the opposite said by an ME (mechanical engineer).
Cheers