Trying to control a 12VDC fan via PWM (via Arduino micro). PWM output to a 1K resistor feeding base of NTE 375 transistor. 12VDC to red fan lead, black fan lead to collector, emitter to ground (diode backwards across fan) .
Fan runs fine at 95 to 100% duty cycle, but anything less and the fan stalls and seems like it wants to start but doesn't (sort of just wobbles but doesn't spin). You can just hear it buzzing. Any ideas?
This is the fan
http://www.newark.com/sunon/kde1204pkvx-ms-af-gn/axial-fan/dp/89K1822
Fan runs fine at 95 to 100% duty cycle, but anything less and the fan stalls and seems like it wants to start but doesn't (sort of just wobbles but doesn't spin). You can just hear it buzzing. Any ideas?
This is the fan
http://www.newark.com/sunon/kde1204pkvx-ms-af-gn/axial-fan/dp/89K1822