Quote:
Originally Posted by Sadashi
I haven't tried to trick the pcb and not keep the motor because I believe the motor got a sensor on the inside that communicates with the pcb and if it detects that the motor does less than 450 rpm it will shut down the unit .
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If you investigate the motor a bit more you'll probably find one of the wires is providing a square wave pulse output that varies depending on the speed of the motor.
It should be fairly simple to build a circuit (i.e. 555 timer) to simulate this output and allowing you to dispense with your 'motor in a box'.