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The Birth of the Integrated Circuit
The creation of the integrated circuit (IC) stands as one of the most important inventions of mankind.
The Story of the Transistor
A journey through the history that led to the most important invention of the 20th century.
Dark Energy and the Expanding Universe
Explore concepts such as energy density and negative pressure as it relates to our universe.
The Discovery of Radio Waves
Take a look back at how the serious study of radio waves was launched.
Receiving Data with Web Based Shortwave Radios
Discover the secrets to utilizing free Web based shortwave radio receivers.
An Ultra Modern Shortwave Radio
A simple circuit, a USB TV tuner, your computer, and some powerful (free!) software combine to make an amazing software defined communications receiver for around $25.
Receiving Data with a Low Cost Shortwave Radio
A computer, some powerful software, and a shortwave receiver combine to make decoding many types of radio transmissions possible.
The Radio Whisperer
The simplicity of the WSPR receiver described here makes it attractive as a low cost radio propagation tool.
A Low Cost RF Impedance Analyzer
A voltmeter, signal generator, and a few parts combine to make a powerful impedance measuring tool.
Wirespondence, Serial Bluetooth with a Micro, Analog Front End, AM/FM Receiver Restoration
Analog Waves from Digital Signals, DIY Electric Scooter, The Solar Alternative, Driving LEDs with a Microcontroller
Selected questions from past Q&A columns.
Need to brush up on your electronics principles? These multi-part series may be just what you need!