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 ...

Learn about symbols for electrical components and how to draw circuit diagrams. Bitesize Scotland Science article for learners at Second Level Curriculum for Excellence.ls explained for curriculum ...

Some 1.5 v LED flasher circuits are available on the internet and we like to present you four of them. The flasher circuits below operate on a single 1.5 volt battery. LED flasher circuit diagrams The ...