A while back, one of my devices failed the electromagnetic disturbances test. More specifically, there were problems with the conducted emissions on wired network ports in the frequency range from 150 kHz to 30 MHz. The device only passed for…
Welcome back to the second part of this series on building a DIY alarm system circuit. In the previous article, I explored the various components that make up this robust security solution, including the LTE module, USB-C charging circuit, SIM…
Do you hate it when someone steals from you? Personally, I find it rather irritating. However, there have been instances of thieves visiting our apartment building’s underground garage. And thieves do what they do, so things go missing from storage…