Elektrosluch is a device for listening to electromagnetic fields. It works as a translator of oscillations from electromagnetic domain, through electric domain to audible domain. This is a tutorial on making your own basic version.
Software-defined radios (SDR) are gaining in popularity, and it's not hard to see why — using them, your computer can tune into in an enormous range of frequencies, including FM radio, unencrypted police and fire bands, aircraft transpond...
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