Forbes contributors publish independent expert analyses and insights. I am an investigative attorney and physical security specialist. Many buildings, including apartment and condo complexes, are ...

Group entry hacks are a favorite for hacker social groups. Why use old fashioned keys when you can use newfangled electronic keys? If you are looking to build a simple RFID-based security system to ...

Whether to use intercom gadgets while riding a motorbike is a tough decision. While a lot of riders truly enjoy the benefits of being able to talk with their passengers or with other motorists, should ...

The circuit provides a simple illustration of a door phone intercom system having a two-way communication using the features of LM386 amplifier. Intercom – short for intercommunication, is an ...

Even today, analog connections are a very common way of connecting keypanels to matrix intercom systems. Since each keypanel requires a dedicated connector, the size of breakout panels and the number ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. There are three types of communication that can convey complex information: written, visual (i.e.