Here's a video of Don at I at 3am, when a lot of progress on the "Dribble", a Riffle for a depth sensor.
This is the Riffle [arduino + microSD + battery + storage battery] + 555 + capacitance wire inside of a stand pipe.
By stand pipe I mean a 3' length of 3" ABS chopped with a chop saw and drilled out, 8 intake holes in the bottom, 8 air outflow holes up top.
30 second start for instant presentation.
Questions and next steps
This is an update from when Don visited last time, when Lauren Sullivan made many videos on the Riffle.
[CODE TO BE SHARED SOON]