uncleflo
Registered since September 28th, 2017
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Tag selected: EMF.
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Tutorial on back EMF suppresion: its causes and its cures.
Saved by uncleflo on July 17th, 2014.
Physical electronic access control, almost always, involves driving an electromagnetic locking device of some kind. It might be a powerful magnet or a smaller solenoid within a strike. All these devices are subject to the same basic laws of physics. The electromagnet will store energy when powered and will generate a “back EMF”, or counter EMF (CEMF), when the supply is switched off.
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WHO | Electromagnetic fields
Saved by uncleflo on October 30th, 2011.
Electromagnetic fields of all frequencies represent one of the most common and fastest growing environmental influences, about which anxiety and speculation are spreading. All populations are now exposed to varying degrees of EMF, and the levels will continue to increase as technology advances. As part of its Charter to protect public health and in response to public concern, the World Health Organization (WHO) established the International EMF Project in 1996 to assess the scientific evidence of possible health effects of EMF in the frequency range from 0 to 300 GHz.
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