Daily Archive: July 4, 2018

How your phone is used to track you as you move through a store

Ultrasound “beacons” are set up in various locations such as within stores. Apps that run on smart phones are constantly listening for ultrasound beacons (which are emitted above the audible range so we cannot hear them). Each beacon can encode a unique ID to be used to determine proximity to a specific location. In some cases, ultrasound or other types of audible signals can be embedded in television or audio programming and apps can detect...

Many #quadcopter #FPV television video transmitters are not legal #drones

Anyone who has looked anywhere online – Youtube videos or just perusing online stores for model aircraft parts – has seen devices for sending video signals from a model aircraft. Most of the ones I see are not legal and do not comply with FCC rules in the U.S. Many, if not most, of the devices that advertise “500mw” or “800mw” or “1200mw” and so on, are not legal devices, as used by most FPV...

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