Building GA Transponder like KT-76C

[split moat]

Hello everyone

I have an ongoing project with an Kt-76C like Tarnsponder
It is built in buttons instead of encoders and the build is strightforward with one exception.

I want to see what i have "entered so far", pretty much like @quasi wyvern have done in the video https://www.youtube.com/watch?v=-2wvzZ1n_w0 (18:45 in)

I understand that Sebastian in "kind" of are describing it in the video https://www.youtube.com/watch?v=DZuVu4qU9Uc but i am not able to connect the dots so to say to adopt it for not using Encoders in an efficieant way

So please hit me up with some tips on how to get it done

[true shell]

Read this
https://github.com/MobiFlight/MobiFlight-Connector/wiki/MSFS2020-Transponder-Keypad-and-Display-on-7-Segment-Module

Different approach using RPN though

[latent kelp]

Question - will the buttons be backlit during night flight?

[split moat]

Have considered that but not came that far in the process

[latent kelp]

I'm working on a PCB for the KT76C from @bronze apex and I changed the buttons to these. The x and z values ​​have been increased from the original design. https://www.aliexpress.com/item/32947920178.html?spm=a2g0o.order_list.order_list_main.10.1b111802EeXuOn

[split moat]

That one was really intresting....

[latent kelp]

PCB hint

button illumination on KAP140 , author of SW for OLED - KAP140 @bronze apex

[bronze apex]

Nice!

[flint flax]

for my kap140 I just use the common illuminated tactile switches, and 3d printed caps in white PLA. These light really nicely and they're cheap!

#1167954039187714048 message

#1167954039187714048 message

[latent kelp]

please give me a link for illuminated tactile switches thank you

[true shell]

#1240422680453320844 message

[flint flax]

These are specifically the ones I use (then my button cap connections are compatible). https://www.te.com/en/plp/alcoswitch-fsmij/X28am.html

[oblique trail]

Hi! Can you please share your 3d printed caps?