A door contact switch detects if a door is open. If the door is open, a timer starts for a TBD amount of minutes. If the door is closed once before the TBD amount of minutes is reached, the timer is ...

This simple Door Chime protects the door and gives a loud Alarm tone when there is an attempt of theft. The circuit is too simple and battery operated. A Normally Closed (NC) reed switch and magnet is ...

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The significance of safety in a house cannot be overstated, so how well a door alarm sensor will safeguard your family from harm should be your top priority while shopping for one. These sensors come ...

A door alarm is an essential security feature for your home or office, keeping intruders at bay and improving the overall safety of your property. You don’t need to break the bank for an advanced ...

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 ...

Last month, Ring began taking pre-orders for its Ring Alarm home security system, and today it begins shipping. I've had a chance to spend some time with Ring Alarm, and I've found it's an easy-to-use ...

Going to try something a bit different today, and talk about some retro technology. Here’s a rather simple gadget called a Bloc-Alarm. Intended for the cheapskate who doesn’t want to actually pay for ...

As California highway slides toward sea, the fix will take billions $2K tariff checks would go to ‘working families’: Bessent ...