another TELEX update
back in LA and able to test the expander with other equipment. feeling very good about status. going to send a 1.1 board to production soon and, after testing, will be ready to start thinking about producing this for folks that are interested.
still need to get the input working with the teletype. i'm going to play around with the "i2c_master_rx" function that @tehn just added, but i'm concerned about latency and may need to wait until more of the enhanced II implementation is in place
latest test videos
tested the voltage outputs running in parallel and scoped them in the o'tool. tolerance is the same between teletype outputs and the expander outputs for the CV outs. (yay!)
here is a short video of them running in parallel; halfway through i switch polarity and run the expander with negative voltages. thanks to great forethought in @tehn's base teletype code, it worked out of the box. (teletype output is on the left, telex on the right)
those tests done, i wanted to finally use the expander to drive another module. here is a dippy little test where the 0-coast is being driven completely by the expander's outputs. the teletype is randomly cycling through a little octatonic two-octave pattern with the param knob adjusting the probability of it advancing a step. various bipolar cv values are coming out of the expander and adjusting the 0-coast's timbre and note duration.