Aqara’s U400 smart lock boasts hands-free unlocking

The Aqara U400 combines Apple Home Keys with an Ultra-wideband radio to unlock your door as you approach with your smart ...
Hosted on MSN

How To Perform A Kwikset Smart Lock Reset (And Change The 4-Digit Code?)

Smart locks have certainly elevated the way we enter our homes. But while smart locks and other smart home devices can make your home more secure and offer some level of convenience, they're not ...

I tested Apple’s hands-free Home Key — and it’s a big upgrade

The U400 ($269.99) is the first to support Apple’s Home Key’s hands-free unlocking. This uses the U1 ultra-wideband (UWB) ...

CES 2026: Aqara Launches U400 Smart Lock With HomeKit and Hands-Free UWB Unlocking

Smart home company Aqara today debuted its latest smart lock, the U400. The Aqara Smart Lock U400 incorporates ultra wideband (UWB) technology for more precise location-based tracking and automated ...
EDN

Electronic Code Lock using Single Transistor

The main principle of this circuit is that the door lock opens only when the buttons in series are pressed at a time. We can use it to lock the doors and for other security purposes. This article ...