The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply. The circuit employs the functions of reed switches to produce a gate alarm ...

We are in a digital era! Now we can add some intelligence to our doors and gates without too much investments. Just assemble this little door timer circuit built around a few cheap and simple ...

With a visually appealing and functional design, SDC door prop alarms are compatible with all access control systems but can also function as a stand-alone solution. Now you can condition access ...

Obnoxiously loud subway-gate alarms are returning to some stations as part of a pilot program to stop farebeaters, according to transit officials. The ear-splitting emergency-exit sirens — which irked ...

PENSACOLA, Fla . -- Police say the pool where the two children were found is up to code and met florida's safety ...

Improve security with a cost-effective door prop alarm. All SDC door prop alarms feature audible sirens with adjustable timer settings, two outputs, bypass status indicator light, and vandal-resistant ...