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 ...

Creating illuminated play dough sculptures is easy once you know the basics of circuit building. Master these simple circuits and you'll be ready to create a glowing play dough masterpiece. But ...

In this article I will add some simple Arduino LED projects starting with basic ones like how to turn on an LED, blinking, and more. Every step will have the code, the schematic, photos of the project ...

A calculator powered by solar cells Circuit diagrams A circuit diagram uses circuit symbols to represent each component in the circuit. This picture shows a simple circuit with a cell and a lamp .