QElectroTech is an open source tool for drawing these types of diagrams. It consists of two tools: an element editor for creating schematic symbols and a diagram editor for creating your drawings.

It describes the concept of electric circuits, including closed and open circuits, and the role of switches in controlling the flow of current. The video demonstrates experiments using dry cells ...

When drawing circuit diagrams, rather than drawing detailed components, we use simple symbols to represent the different components.

But scientists are now putting circuit design in the hands of the public with pens that can draw with conductive ink. This new ink can be loaded into a regular ballpoint pen and lets users sketch ...

Drawing diagrams with nodes and arrows ... Figure 1: A pathway in different graphical notations. Circuit schematic diagrams used in electronics are ideal examples of a graphical diagram.