Junyi Zhao in the McKelvey School of Engineering demonstrates using a simple ballpoint pen to write custom LEDs on paper (left). The same pens can be used to draw multicolored designs on aluminum ...

This Common Ballpoint Pen Can Draw, Write Custom LEDs — How? This simple ballpoint pen allows users to write custom LEDs. By Jace Dela Cruz Aug 11 2023, 07:04 AM EDT .

We loved the easy flow of these pens – a range of bright colours for those who really like to express themselves – not least because they made a satisfying squeaky sound as we wrote. £9 from ...

Junyi Zhao demonstrates using a simple ballpoint pen to write custom LEDs on paper (left). The same pens can be used to draw multicolored designs on aluminum foil (top right) and to create light up ...

The invention of the printing press revolutionized duplication of the written word, giving the hands of tired scribes a break and making written material more accessible. A similar breakthrough has ...