“A USB drill is a very useful and must have tool for every hobbyists. In this Intructable, i decided to make a DIY mini USB drill that can be easily made at home by anyone just with very few components. This Mini USB drill is useful for drilling PCB boards, bakelite, cardboards and wood. The USB drill can be powered by any USB mobile charger or a mobile powerbank. Note: It is recommended to not use this drill with the USB port of your PC or laptop to prevent any damage to the USB port of the system.”
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