Re: Question on Power Supply - stepper trick

> If you want to try something kinda neat...
>
> Grab a stepper motor (any kind will do, not connected to anything -
> just bare wires and nothing connected to the shafts) and turn the
> shaft with your hand. Then, short out any two wires and try to spin
> the shaft again.
>
> If you feel resistance, then you've shorted two wires from the same
> coil inside the motor. (This is a simple way to find out the wiring
> scheme when no diagram is available).
>
> The 'resistance' you feel is the BEMF that would be sent from the
> stepper motor to the power supply. If the power supply is regulated,
> it'll try to fight this as well (so to speak).
>