Simple circuit design to turn off an external USB drive when the system using it is turned off.
http://dangerousprototypes.com/2013/03/21/auto-poweroff-for-an-external-usb-hard-drive/
Simple circuit design to turn off an external USB drive when the system using it is turned off.
http://dangerousprototypes.com/2013/03/21/auto-poweroff-for-an-external-usb-hard-drive/