Using 2.4 GHz to determine distance and direction to your lost item
Of the numerous technologies currently available to help you locate a lost item, most have the same limitations: they are only useful if the items are within Bluetooth’s 30- to 100-foot (10 - 30 m) distance limit, or they require you to purchase a cellular modem and pay a monthly service fee so that you can send GPS data across the cellular network. This article will show you how to locate items that are up to miles away (without a cell phone, cellular network or GPS receiver) — not only showing you the distance, but also the direction to that item!
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