A timer-controlled doorbell device has been developed using two 555 timer ICs in monostable mode, combined with a relay ...

In DC voltage applications, the RC snubber network is typically wired across the relay contacts, whereas in standard AC ...

I tested it myself. Here’s my honest experience with this off-grid water solution that pulls clean water from thin air.

DIG Sukkur Region Captain Retired Faisal Abdullah Chachar, Deputy Commissioner Khairpur Fayyaz Hussain Rahujo and SSP Khairpur on Thursday visited the Safe City CCTV Control Room set up at the Deputy ...

China’s surveillance system isn’t just about facial recognition or data tracking—it’s the result of a deliberate political ...

Traditional verification involves a high degree of manual intervention, especially if the design is constantly evolving. This ...

At CNET, we've been installing security cams for years. I've rounded up the best places we've learned to put them.

Security cameras are safer than ever but if you're worried about unauthorized access, here are some steps you can follow for an added layer of security.

The Aqara Camera Hub G5 Pro is the most well-connected security camera we've tested, with support for all major smart home automation and voice control ecosystems, earning our top recommendation.

A doorbell camera shows what's happening outside your home and lets you speak with whoever is out there. Smarten up your home security with the best video doorbells we've tested.

In this paper, a variable inertance and variable damping (VIVD) vibration control system with an electric circuit is proposed and analysed. By connecting a VD device and an inerter in series, a VI ...

Traditional data sharing systems are facing new challenges when implementing access control with more and more complex data sharing requirements. Flexibility of user revocation in completely ...