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.

Step 1: Watch the Video

A video is a great tool that provides deep insight into the procedure and makes the tutorial interesting as well as easy to understand. However, you can also visit next steps for additional details and pictures.

Step 2: Order Parts

Ebay.com

DC motor high RPM - https://rover.ebay.com/rover/1/711-53200-19255-0/1...
Mini Drill Chuck - https://rover.ebay.com/rover/1/711-53200-19255-0/...
Mini Drill Bits - https://rover.ebay.com/rover/1/711-53200-19255-0/1...
Toggle Switch - https://rover.ebay.com/rover/1/711-53200-19255-0/1...
IN4007 Diode - https://rover.ebay.com/rover/1/711-53200-19255-0/1...
Hot Glue Gun - https://rover.ebay.com/rover/1/711-53200-19255-0/...
Soldering Iron - https://rover.ebay.com/rover/1/711-53200-19255-0/1...

Amazon.com

DC motor high RPM - http://amzn.to/2wnIVEH
Mini Drill Chuck - http://amzn.to/2vkuhRH
Mini Drill Bits - http://amzn.to/2vkEGgw
Toggle Switch - http://amzn.to/2v1GNmD
IN4007 Diode - http://amzn.to/2fO86x7
Hot Glue Gun - https://amzn.to/2Sf7oad
Soldering Iron - http://amzn.to/2r3IX6g

Amazon.in

DC motor high RPM - http://amzn.to/2wdEyQS
Mini Drill Chuck - http://amzn.to/2w58HRI
Mini Drill Bits - http://amzn.to/2wdFuom
Toggle Switch - http://amzn.to/2wdSyd1
IN4007 Diode - http://amzn.to/2vHlHvX
Hot Glue Gun - http://amzn.to/2rjNE9r
Soldering Iron - http://amzn.to/2qC47qG

From Home and Local Store: Cardboard, connecting wires and an old USB cable.

Step 3: Prepare the Motor

Cut a piece of thin Cardboard of about 1.5cm x 1.5cm.
Using Hot Glue, Paste the cardboard piece on the DC motor.
Paste a toggle switch at the centre of the cardboard as can be seen in the attached images.
Cut a USB cable from the end opposite to the USB plug.
Identify the power wires out of 4 wires in the USB cable (generally of black and red colour) and also, identify the data wires.
Cut both the data wires as we will only be using the power wires in the USB cable.

Note: You can also identify the wires using a multimeter (in conductance mode) as the PIN 1 and PIN 4 are the power pins on a USB port.

Step 4: Make Connections

Connect a wire from the USB cable to the toggle switch.
Connect another wire from USB cable to a motor terminal.
Connect a IN4007 rectifier diode in forward bias between the remaining motor terminal and the toggle switch.
Attach the Mini Drill chuck on the motor shaft and tight all the screws using the provided Allen Key.

Note: In order to protect the USB port from the back EMF (Electromotive Force) of motor, it is important to connect a rectifier diode to the motor terminal.

Step 5: Test Mini USB Drill

Insert the drill bit of required size in the mini drill chuck.
Connect a mobile powerbank (or a mobile charger) as a power source.
Our mini USB drill is ready to use.

So friends, this here concludes the instructable, make this wonderful DIY mini USB drill at home and don't forget to share your experiences in the comments section below. Stay tuned and Follow me on instructables to receive regular updates. In case you might have missed, watch the video and see how i made this Mini USB Drill at home.

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I have also made a new multipurpose tool that can be used as a mini drill as well as electric cutter. Have a look at the instructable here or watch the video below.