"You can build circuits straight on to paper, even in a spiral notebook," says Jie Qi, a member of the High-Low Tech Group at the Media Lab. Here she explains how to draw your connections.

Figure 2 This circuit overcomes problems of excessive power consumption, uncertain switching, and LED aging. The circuit’s main components comprise amplitude detector D 1, capacitor C 1, and Schmitt ...

Researchers managed to add LED lights to the hand-drawn circuit Scientists in the US have created a roller ball pen that can be used to draw functioning circuit boards. The research team at the ...