Perhaps the simplest radio one can build is the crystal radio. Using a diode as a detector, the design generally uses less than 10 components and no battery, getting its power to run from the radio ...

This type of crystal radio design requires unbalanced antenna i.e. grounding must be of high quality (resistance of 10-100ohm) in order for radio to operate. Electronic circuit has been inspired by ...

[George Trimble] likes to build crystal radios. The original crystal radio builders used high impedance headphones. In modern builds, you are as likely to include a powered amplifier to drive a ...

A crystal radio set is almost like magic. Sound appears, seemingly out of nowhere, powered not by cords and batteries, but by the very air around you. “You can’t quite work out how it comes alive,” ...

Many years ago when I was about 10 years old I received the gift of a crystal radio. I think it had about three parts. What was the crystal and how did it work? A crystal radio? Did you hook the ...

The possibility of producing FM crystal radio is shown in this project which can produce a sound with high fidelity that is as good as or better than more expensive AM radios when connected as a ...

One of the challenging aspects of the coronavirus COVID-19 crisis is the time spent at home in quarantine. For those with a Do-It-Yourself (DIY) bend, this might be the perfect time to build a fairly ...

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It is estimated the total spending on Internet of Things (IoT) devices and infrastructure will reach $1.2 trillion by 2022, up from an estimated $151 billion last year. Such rapid growth indicates ...

A crystal radio is the basic form of a radio, which can detect radio signals without a power supply. What is a crystal radio? A crystal radio is the basic form of a radio, which can detect radio ...