Automatic power control module for battery powered devices
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United States of America Patent
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Aug 11, 2009
Grant Date -
Apr 28, 2005
app pub date -
Jan 22, 2004
filing date -
Jan 22, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A power control module which can be used to automatically open a power circuit for electrically operated devices, particularly battery operated devices, during predetermined periods of non-use. A timer is reset by a motion detector indicating continuing use. The timer controls a transistor switch which closes and opens the power circuit as required. The timing interval can be user-selected e.g., by programming a microprocessor controller. The transition time between conductive and non-conductive states of the transistor can also be controlled to prolong the life of incandescent bulbs or other sensitive load devices.
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