The start of their anecdote. The album's other cards are for you to discover in the game.
Alexanderson alternator
by Ernst Alexanderson
Spin an alternator fast enough and it gives off radio energy: the idea had been around since a lecture by Frederick Trouton in 1891. In 1904 Reginald Fessenden signed with General Electric to get one making 100000 Hz.
Photo: Gunther Tschuch (CC BY 2.5)
Darlington transistor
by Sidney Darlington
Putting two transistors one behind the other gives a component with a much greater current gain: it equals the product of the two gains. An engineer at Bell Laboratories had the idea in 1953.
Photo: Raimond Spekking (CC BY-SA 4.0)
Geissler tube
by Heinrich Geißler
A glassblower in Bonn sealed an electrode at each end of a cylinder partly emptied of air. Under high voltage the gas lit up. It is the ancestor of neon lighting.
Photo: M. Rapine (Public domain)