Why spend time etching circuit boards and applying solder masks when all you really need is a rollerball pen and some paper ... possibility of putting conductive ink into a standard rollerball ...

Circuit Scribe is a standard-looking pen that writes in conductive magnetic ink. Wherever you can write with a ballpoint Bic, you can now lay out an electronic circuit as easy or complex as you like.

Scientists have now developed special conductive inks that can be printed right onto a person's scalp to measure brain waves, even if they have hair. According to a new paper published in the ...