A network of 74 sensors — 57 of which were ultrasonic sensors developed by the University of Augsburg (shown at top and as light blue dots in upper and low mold halves) — were used in the T-RTM ...

Sometimes, it’s time to shut down the oscilloscope, and break out the cardboard and paints. If you’re wondering what for, well, here’s a reminder of an Instructable from [CrazyScience], that brings us ...