+12 and USB at same time?

I am working on a project that requires 12 volts to work. I'm getting it off the sensor shield, which gets it from the arduino input. I've been unplugging the 12V and plugging in USB to download sketch to arduino, then unplugging USB and plugging in the 12v to test. It's a hassle! Can I leave the USB plugged in while 12v is energized?

Jim

alfiesty: Can I leave the USB plugged in while 12v is energized?

Yes.

Thanks

Jim