For the musicians out there, here’s a device that shows you what notes are in a scale, given a root note and a diatonic mode. It has seven settings for all of the modes from ionian (major) to locrian.
It’s like a circle of fifths, but more convoluted because it has moving parts 
You turn the outer ring to choose the mode; when the “1” (1st scale note) is visible through the window, the mode next to that window is selected. E.g. if you can see a “1” through the window labeled “vi”, mode vi (aeolian/minor) is selected. You then turn the inner ring to line up a note with the “1”, and the notes in the scale will line up with numbers 2-7 in other windows.
I also made a linear version that slides instead of rotating, which I find a little easier to read.
ScaleCalculators.zip (38.4 KB)
edit: added dotted lines to show where pieces line up
