Electronics Engineering · CHAPTER 01
Introduction to Electronics
From conductors and closed circuits to vacuum tubes, image transmission and the first electronic television systems.
CHAPTER CONTENT
Choose a subchapter.
Conductors & Insulators
Why some materials carry charge easily while others protect us from it.
The Complete Circuit
Source, conductive path and load: the three ingredients of a working loop.
The Electron & Edison Effect
How electron discovery and a bluish lamp glow opened the door to electronics.
Fleming’s Vacuum Diode
A heated cathode, a positive anode and one-way electron flow for radio detection.
De Forest’s Triode
A control grid turns a small voltage variation into control of a much larger current.
The Television Revolution
Why television emerged from many connected discoveries rather than one inventor.
Joseph Henry
Insulated coils, powerful electromagnets, early motors and transformer action.
Caselli’s Pantelegraph
The first practical machine to transmit handwriting and drawings over wires.
Willoughby Smith
Selenium photoconductivity reveals how light can become an electrical signal.
Carey’s Selenium Camera
An early proposal to turn a complete image into many electrical samples.
Edison’s Phonograph
Turning sound vibrations into a physical groove—and back into sound.
Nipkow’s Scanning Disk
Dividing an image into lines for electromechanical transmission.
Cathode-Ray Television
Rosing and Campbell-Swinton move television toward electronic display.
Farnsworth’s Image Dissector
Photoemission and scanning transform a focused optical image into a signal.