HDD at 10200 RPM with Quadcopter ESC Laser Tachometer Oscilloscope00:06

HDD at 10200 RPM with Quadcopter ESC (brushless speed controller).
Speed measured with laser and my Rigol DS1054z Oscilloscope.
Pulse generated with the Transistor Tester upgraded with the new new m-firmware by Markus Reschke

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