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GMU:Bioelectronics, aesthetics and other interesting things/Crystal radio: Difference between revisions
GMU:Bioelectronics, aesthetics and other interesting things/Crystal radio (view source)
Revision as of 22:46, 25 April 2016
, 25 April 2016→Minerals, crystals, carbon, Biogenic silica
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Image: https://www.researchgate.net/figure/257542392_fig3_Fig-7-Joe-Davis-Bacterial-Radio-11-Joe-Davis-reverses-the-main-goal-of-synthetic | Image: https://www.researchgate.net/figure/257542392_fig3_Fig-7-Joe-Davis-Bacterial-Radio-11-Joe-Davis-reverses-the-main-goal-of-synthetic | ||
==Minerals, crystals, carbon, Biogenic silica== | ==Minerals, crystals, carbon, Biogenic silica, semiconductors== | ||
* A mineral is a naturally occurring substance, representable by a chemical formula, usually solid and inorganic, carries a crystal structure. The silicate minerals compose over 90% of the Earth's crust. | * A mineral is a naturally occurring substance, representable by a chemical formula, usually solid and inorganic, carries a crystal structure. The silicate minerals compose over 90% of the Earth's crust. | ||
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* Biogenic silica (bSi) forms one of the most widespread biogenic minerals. For example, microscopic particles of silica can be found in bacteria, animals and plants. In order to conduct voltage for his bacterial radio Joe Davis used orange marine puffball sponges (Tethya aurantia). Silica is an amorphous metal oxide formed by complex inorganic polymerization processes. | * Biogenic silica (bSi) forms one of the most widespread biogenic minerals. For example, microscopic particles of silica can be found in bacteria, animals and plants. In order to conduct voltage for his bacterial radio Joe Davis used orange marine puffball sponges (Tethya aurantia). Silica is an amorphous metal oxide formed by complex inorganic polymerization processes. | ||
* A semiconductor is a material with electrical conductivity due to electron flow (as opposed to ionic conductivity) intermediate in magnitude between that of a conductor and an insulator. | |||
==Crystal radio== | ==Crystal radio== | ||
“A crystal radio is a basic resonant circuit requiring only induction, capacitance and a radio “crystal,” a mineral semiconductor used to convert received radio signals into DC electrical signals that can be resolved with headphones as sound. These simple circuits require no batteries, tubes or transistors and operate with only the difference in voltage between the antenna and the ground.” (bacterial radio, http://prix2012.aec.at/prixwinner/7023/) | “A crystal radio is a basic resonant circuit requiring only induction, capacitance and a radio “crystal,” a mineral semiconductor used to convert received radio signals into DC electrical signals that can be resolved with headphones as sound. These simple circuits require no batteries, tubes or transistors and operate with only the difference in voltage between the antenna and the ground.” (bacterial radio, http://prix2012.aec.at/prixwinner/7023/) | ||