Selected articles from this issue.
DC voltage is one of the most common measurements we make. But just what is a volt and how is it maintained?
In the US, the DC volt is legally defined by the Josephson array — a super conducting quantum device with a highly repeatable output voltage. So how is the AC volt defined?
Explore the concept of Turing Machines and experiment with a simple Turing Machine simulator.
Much as we learn about ourselves from our mistakes, we can learn a great deal about transformers from their imperfections.
Locate and diagnose mechanical problems with this electronic stethoscope.
