One of the most affordable, approachable bolt-action pens on the market, Nitecore’s NTP31 Bolt-Action Pen is both an old ...

This video demonstrates each step needed to create a unique and functional pen with a manual transmission mechanism. Learn how simple materials and creativity can bring this innovative idea to life.

This paper feed mechanism serves as the Y axis, and the X axis rides above the paper on precision rods. The pen holder is supported by a tiny solenoid. Things start getting crazy at the software ...