I’m an electrical engineer by training (but now I run a software company), but I don’t build much in the way of electronics these days. BUT… I have a friend (software engineer) who does build some stuff.
I’d be willing to spend 10 or 20 minutes looking at it. He might also be willing to do the same.
I highly recommend that you do some sort of screen share like Teamviewer (I could also just record my screen, BUT you might want to ask me questions WHILE I’m looking at it).
Let me know if you’re interested in me or my friend (Jim). I’d do it for a free license and he probably would to.
Also, I highly recommend reading Don’t Make Me Think by Steve Krug (and/or watch his talks on Youtube), especially “how to do a quick usability study”.
I’ve done lots of them and it helps to have a script and a scenario for the user.
BTW, have you considered selling (perhaps just as an affiliate) electronics kits?
Or Blogging about easy & fun to build stuff?
Seems like a nice compliment to your software.
There is certainly a resurgence in hobbyist electronics with Arduino and such (that’s what Jim works with).