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Controlling power to motor driver

Hi all,

I have a question about using the Rover 5 motor driver board. I understand that the VCC power supply must be connected before connecting the Vbat line to avoid burning out components. I'd like to have only a single power switch; I'd like to have the microcontroller first supply VCC with power and then supply Vbat with power. How could I do this? Which components could I use that would use the least power while the device is running?