Automatic Pencil Sharpener
This is my vision of the pencil sharpener. I think these days this device should be convenient in daily use. What do we have on hand every day? That's right, our smartphone! So I came up with the idea of using a smartphone as a power source for this pencil sharpener. But don’t worry that this device can be used only with the iPhone. In my imagination, there is room for versions with micro USB and USB Type-C, as well as I think about the version of this pencil sharpener with replaceable connectors.
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