College students have returned in droves to dorms and apartments at campuses everywhere. So this is the time of year we usually start seeing some coded entry hacks. [Charmonkey] recently took on the ...

[Jeremy Blum] wrote in to share his LibeTech QR Code Door Lock project. He developed it during his Senior year at Cornell University along with three of his classmates. It seeks to move away from ...

Amazing Door Lock! diy Making Secret Door Lock with Nut Bolt I Coded Door Lock Man arrested after spraying Ilhan Omar with substance at Minneapolis town hall Enormous freshwater reservoir discovered ...

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 ...