If you're a casual user, you probably think of a USB flash drive as simply a place to store files or photos. Here are five ...

If you rely solely on a PIN or password, your system is more vulnerable ... However, have you considered turning that old USB drive in your drawer into a secure unlock key instead?

connect the positive battery terminal to the 7805 input pin, the positive usb pin to the 7805 output pin, and connect the negative battery terminal and the usb ground pin to the 7805 ground pin.