#2432: Callinkcard

Carrying a pen about with you is now perceived as almost as nerdy as wearing a wristwatch or taping the bridge of your spectacles.

Today’s invention is a phone case which allows people to make a brief printed note using only their cellphone.


The phone in its case is placed on a piece of paper.

One of four hemispherical ‘feet’ in the case is equipped with a graphite coating.

A program on the phone drives the onboard eccentric flywheel vibration so that the drawing foot is driven across the paper, creating marks as it goes.

Since writing paper has a pretty consistent coefficient of friction, simple, continuous-line versions of on-screen text or symbols can thus be reproduced.

One Comment:

  1. Might need a couple of motors

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