Tech note: making your own V-I plots at home

Michał Zalewski on the lcamtuf’s thing blog says when working on the book, The Secret Life of Circuits, he wanted to keep the artwork real.

My beef with the diagrams in popular electronics textbooks and online tutorials is that most of them are fake. At best, they’re retraced from ancient texts; at worst, they’re sketched from memory and can be charitably described as “inspired by true events”.

The Secret Life of Circuits contains about 290 original illustrations and does its best to avoid such shenanigans. I painstakingly gathered real data for everything from quartz crystal frequency response, to battery discharge curves, to signal reflections in a 100 ft run of coax cable strewn around the workshop, to the behavior of vacuum tubes.

See how real-world measurements differed from the pretty textbook diagrams in the post here.

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