Sometimes you need to know which wire/node is positive polarity and which wire/node is negative polarity.The LED as a polarity indicator circuit is show in above diagram. In the diagram as you can see ...

Discover the step-by-step process of creating a powerful music reactive LED strip circuit in this comprehensive tutorial.

This circuit is not complex, but it saved the day in an application involving visual inspection of the spray pattern of fuel injectors for quality and consistency. In this application, xenon strobe ...

Created by Jennifer Lewis and Brett Walker, Circuit Scribe is a rollerball pen that can draw functioning circuits with silver ink. The research started at the University of Illinois and now the ...

"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.

Many equipment manufacturers prefer protection circuits combining resettable overcurrent protection devices with upstream fail-safe protection. In this example, R1 represents a ballast resistor used ...