I'm using my tsunami as a motor controller. It works great...
Now, I need to use it when not connected to the USB. Is there anything I need to do other than provide +5 volts to it?

How much power is required, approximately?

Thanks,
Randall

Using a standard 'usb charger' is probably the best and easiest way to power it. It uses about 50mA plus whatever load you place on it.