I worked on a BLDC-powered high-end blender prototype for a company that wanted to get into that market, and when we wanted to measure the speed of the motor, we connected to the controller's serial console. :)
On a related note, blender sound testing is an awful, awful task. You blend a half-pitcher or so of what are basically airsoft pellets, and it is damn loud. I forget the numbers, but I wore two kinds of hearing protection at once and still found it fatiguing.
On a related note, blender sound testing is an awful, awful task. You blend a half-pitcher or so of what are basically airsoft pellets, and it is damn loud. I forget the numbers, but I wore two kinds of hearing protection at once and still found it fatiguing.