Camden Door Controls has announced the launch of two new battery-powered door alarm systems designed for mechanically secured doors. The new CX-DA800 Series Exit Alarms and CX-DA810 Series Door Prop ...
Now you can build your own simple door alarm security system using a tiny microcontroller chip PIC12F635! The circuit is nothing but an aural alert unit, which raises ...
Door sensors detect door position (i.e., open or closed) based on the precise gap between the magnet and the reed switch.
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