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Lee de Forest

cinematography
You Ain’t Heard Nothin’ Yet – The Movies started Talking

You Ain’t Heard Nothin’ Yet – The Movies started Talking

Harald Sack
On October 6, 1927, the first feature-length motion picture with synchronized dialogue sequences, The Jazz Singer premiered. With its Vitaphone sound-on-disc system it heralded the commercial ascendance of the “talkies” and the decline of the silent film era. The Advent of the Talkies We all know that it started with the silent films already at the end of the 19th century as a simple and innocent fairground attraction. In silent films for entertainment…
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engineering
Enabling Radio Broadcast of Sound – Lee De Forest and the Audion

Enabling Radio Broadcast of Sound – Lee De Forest and the Audion

Tabea Tietz
On August 26, 1873, American inventor Lee de Forest was born. He is credited more than 180 patents. In 1906, de Forest invented the Audion, the first triode vacuum tube and the first electrical device which could amplify a weak electrical signal and make it stronger, making radio broadcasting, television, and long-distance telephone service possible, among many other applications. Lee De Forest – A Young Inventor Lee De Forest was born in Iowa to…
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physics
The Birth of the Transistor, Key Component of Modern Electronics

The Birth of the Transistor, Key Component of Modern Electronics

Harald Sack
On December 22, 1947, John Bardeen, Walter Brattain and William Shockley at ATT‘s Bell Labs developed the first transistor, the key active component in practically all modern electronics. Vacuum Tubes as Predecessor of Transistors The transistor is a three terminal, solid state electronic device. In a three terminal device one can control electric current or voltage between two of the terminals by applying an electric current or voltage to the third terminal.…
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