[pighixxx]’s diagrams are simple, easy to understand, easy to use, and pretty to boot. There is a planned online counterpart to the book, with further elaborations of all of the circuit setups.

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

Students learn to define and give symbols and units for current and resistance and to draw a simple circuit diagram, using convention current for the direction of the flow of electricity.