user15350: I've an Arduino Nano to which a Micro Servo 9g is connected. The Arduino board and consequently the servo are powered by a USB powerbank connected to the board with a USB mini cable.
My question is: Is there a way to insert a power switch so I can turn on/off the board without plug/unplug the USB (that now is the way I use) ?
I was thinking to cut the USB cable and work with the positive of it but if someone has an alternative or any tips I'd really appreciate it. Thanks!
EDIT: If is needed I could make a wiring diagram.

user2881: Cutting a usb wire would be the easiest. Otherwise you'd have to cut traces in the pcb and attach wires. Not recommend for beginners. You can actually buy usb cable with a switch.
Another alternative would be to put the microcontroler in sleep mode and have it use very little power. 

15350: <p>I've an Arduino Nano to which a <a href="http://www.robotelettronica.altervista.org/immagini/tower-pro-sg90.jpg" rel="nofollow">Micro Servo 9g</a> is connected. The Arduino board and consequently the servo are powered by a USB powerbank connected to the board with a USB mini cable.</p>

<p>My question is: Is there a way to insert a power switch so I can turn on/off the board without plug/unplug the USB (that now is the way I use) ?
I was thinking to cut the USB cable and work with the positive of it but if someone has an alternative or any tips I'd really appreciate it. Thanks!</p>

<p>EDIT: If is needed I could make a wiring diagram.</p>
 2881: <p>Cutting a usb wire would be the easiest. Otherwise you'd have to cut traces in the pcb and attach wires. Not recommend for beginners. You can actually buy usb cable with a switch.</p>

<p>Another alternative would be to put the microcontroler in sleep mode and have it use very little power. </p>
