Beyond the power variant, it sometimes seems as though we rarely encounter a discrete transistor these days, such has been the advance of integrated electronics. But they have a rich history, going ...

A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

Collaborators on a European project to develop a handheld photoacoustic (PA) imaging probe for early diagnosis of diseases including skin cancer and rheumatoid arthritis are gearing up for clinical ...