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Electric strike / buzzers

electric strikes are security locking devices that are found in places where access control is required. they are also known as door strikes or door releases. they are controlled by low-voltage electrical power sources.
electric strikes come in many varieties. they can be 12 or 24 or even higher voltage and they may take ac or dc current and some even take both. they may be fail safe or fail secure.
a fail safe electric strike needs power to keep it locked. a fail secure electric strike stays locked even without power.
the most common by far is a fail secure. when using a fail secure el...
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