A LED flashing briefly once every 5 seconds to imitate the indicator of a real alarm is the function of this dummy alarm project with the use of a 7555 timer IC. To prolong battery life, the circuit ...

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The unit features two separate protection arrangements. The entry/exit is protected using standard normally-open and/or normally-closed sensors such as magnetic switches and pressure mats. This alarm ...

The QRing 3 Pro brings several new additions, including LED notifications that allow users to receive alerts without constantly checking their smartphones. A newly integrated touch control system ...