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Motion Detector for USPS
Motion Detector for USPS

This device was designed and mass produced for the United States Postal Office and is part of a vehicle identification and location system.


This circuit contains a highly sensitive motion detector whose output is processed by an 8 pin embedded microcontroller which implements a custom filtering algorithm that reliably declares motion in a variety of deployment situations (parked with engine running versus actual driving). The output is used to enable power to a cellular data link and GPS based vehicle tracking system. The circuitry includes automotive regulators and surge supression devices to ensure reliable operation in an automotive environment.

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