Curated OER
Class A: BJT Amplifiers
Within this electrical circuit instructional activity, students draw a schematic design and build a transmitter to grasp the understanding of bipolar junction amplifiers before answering a series of 62 open-ended questions in which...
Curated OER
Design Project: Audio Power Amplifier
In this audio power amplifier worksheet, learners answer five questions about class A amplifiers, sound pressure, crossover distortion, and amplifier design.
Curated OER
Loudspeaker
Students study the different types of loudspeakers and how they work. In this sound lesson students create their own loudspeakers.
Curated OER
Y8 Energy Transfers and Magnetism (H)
For this science word search worksheet, students identify and locate words as they relate to energy transfer and magnetism. There are 17 words to locate in the puzzle and spell correctly.
PBS
People and Discoveries: Lee De Forest
A biography on audion inventor, Lee de Forest, from childhood on. Hyperlinks to additional information about the radio and broadcasting.
Massachusetts Institute of Technology
Mit: Invention of the Week: Lee De Forest
This website provides information on the life and inventions of Lee DeForest, the man who invented the audion tube, which made commercial radio broadcasting practical.
Other
Npn Transistor Common Emitter Amplifier
An interactive example of an NPN transistor CE amplifier circuit, a relatively simple amplifier (as far as amplifiers go), which allows the viewer to change input parameters and see how it affects the circuit output. The site also...
Smithsonian Institution
Lemelson Center: Invention of the Electric Guitar: The Guitars
In this online exhibition, learn about the evolution of the electric guitar by browsing dozens of influential guitar models. Through diagrams and audio samples, discover how different types of electric guitars work and sound.