I am currently working on a project where I need to be able to generate and phase shift 64, 40kHz square waves individually. It would also be nice to be able to adjust the amplitude of the signal, but not a must.
I have heard a rumor of a controller shield for Arduino Mega that allows for this with a single Arduino, but I have searched far and wide and cannot find any such thing. Also, because I need the phase differences of the signals to be fairly accurate, I think it would be easier to do this with a single Arduino (so I don't have to try to sync clocks between multiple Arduinos).
So I was just wondering if anyone here has heard of such a controller shield or could maybe suggest a different setup that would help accomplish this?
I know that this isn't a super specific question but I'm desperate for help.