This Pen Can Draw Electrical Circuits A silver salt based ink lets users draw any circuit they can dream Maris Fessenden - Former correspondent December 24, 2015 ...

Forget printing circuits: how about drawing ’em instead? At least, that’s what you can do with this rollerball, which spews out conductive silver ink to let you doodle circuits all day long.

Want to string together some holiday lights? Or test an idea for a circuit? A new elastic silver ink could let users jot down electrical circuits and wiring on walls and paper with a regular ...