Just wanted to drop a note and let all those interested that I'm still plodding along with this - but as I've stated previously, I have a lot of competing priorities (work, travel, etc.) and an insufficient parts inventory (which creates some longer-than-desired shipping delays). That said, I've had some progress and feel that sharing status here is overdue.
Prototyped the faceplates for the I and the O. The O is fully wired up to headers and ready for testing. I've also done the basics getting a pair of Teensy processors chatting and sharing data (both via transmit and polling).
Here are a couple of shots of my progress from my Instagram acct:
I'm pretty clear on what I'm doing for the circuits for the triggers and the CV IO; and, yes, I've thrown away the idea of trying to filter up the PWM outputs - even with all of the Teensy's extended capabilities all we get out is a noisy twelve-bit signal with, as @gloom_and_glare put it, lots of needless circuitry. The DACs have arrived and are next in the queue.
Right now, I'm trying to get the Teensy responding to some White Whale i2c commands. It's early days and just hooking it up, setting the right addresses and crossing my fingers didn't produce any tangible results. Need to dig a little deeper...
All in all, having a good time with this. But, trust me, this is going to take quite a while given all of the work and travel that I have ahead of me - not counting all of the learning and re-learning on the job that I'm doing. Additionally, the tight footprint makes developing and designing all the more challenging. Apologies if anyone's hopes were up that this will be a near-term reality.
Note: thx to @c1t1zen for the awesome Proto Vero boards; they make hacking Eurorack oh so much more fun!!