Speedy rechargers are helping in the search for truth — honest. Lafayette Instrument Co. has developed the first portable lie detector, employing Bluetooth modules so there's far less bulk to carry. Wireless data acquisition modules make testing less conspicuous to subjects and keep the weight of five modules under a pound. Those modules can be quickly recharged in case examiners want to test many people. The battery-charging system recharges up to eight Lithium-Ion batteries in just two hours. Microchip's MCP73863 manages the charging system.
With erupting concern over police brutality, law enforcement agencies are turning to body-worn cameras to collect evidence and protect police and suspects. But how do they work? And are they even really effective?
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