Using an Oscilloscope to Select a Transistor for a PWM Project

Recently saw some discussion online (I think hackaday.com) regarding the merits of an oscilloscope in the modern hacker’s lab.
As I was working on an DC motor control driver using Pulse Width Modulation (PWM), I was getting odd behavior from the circuit when approaching full power output. In the attached video, I discuss the role an oscilloscope played in helping select an appropriate transistor for the PWM circuit. Specifically, I show how two different transistors behave in the same circuit.

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