Transistors are tiny electronic components that act as switches and amplifiers, and they dwell at the heart of modern technology. In simple terms, a transistor can turn a flow of electricity on or off ...

In this lesson, students build two circuits and explore how transistors function. When Bell Labs introduced the transistor in June of 1948, a spokesman proudly announced "This cylindrical object . . .

Solid-state transistors, in turn, enabled technologies like the transistor radio, which took over a field once dominated by technologies like the cat's-whisker detector. Indeed, by the 1950s, ...