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Received mine today. First thing I did is to take it apart, of course :) It's a little easier to take apart than the previous incarnation. I'm not sure what's the name of the tool I used, but it's that blue plastic thing. It has a small angled "lip" at the end, and it was fairly easy working it in the gap and prying it slightly till the tabs popped. (Edit: iFixit's store called their version "prying tool").
The switches are easily removed from the plate without opening it up if you just want to pop in different switches in there.
There's less space in the casing compared to the earlier incarnation. I couldn't get a Pro Micro to sit flush in there. I might either trim off part of the Pro Micro to make it a bit thinner, or find another microcontroller board to use.
Do you think a Teensy 2.0 would fit? Really interested in what controller you end up going with, because I plan to do the same :)
I have a Teensy 2.0 around somewhere, I'll check tonight, but I'm fairly sure it wouldn't. PCJR's site shows the Teensy 2.0 to be 17.8mm wide, and I think the Pro Micro is 18mm wide.
I also placed an order for a Pololu A-star, which claims to be 0.6" wide. If the measurements are accurate that should be slightly over 15mm, hopefully narrow enough.
OK, I'm wrong. The difference in dimensions is small, but my Teensy 2.0 fit perfectly. There's a small lump of plastic inside the cover, so the Teensy can only fit on the upper right corner when you look at it from underneath. Assembled and used as a keypad, the USB port will be on the upper left corner
Measuring with my calipers, the Teensy is 17.72mm and my Pro Micro is 17.99mm.
Man, you are go-doer. This is great! Thanks for the help!!
You're welcome. Good luck with your project!
@baechooboi I'd love to see the finished product. I was interested in trying something similar with mine, but didn't spend too much time or effort trying to get it apart.
Yes, I will keep this forum posted.