You can use any sound you want for an iPhone alarm, and here's how to set it up.

In this video, I experiment with creating a window and door alarm using the following materials: a small piece of wood, a ...

There are plenty of radios you can buy that pick up MW and SW bands if that’s what you’re into. Or, you can follow [mircemk]’s example, and whip one up yourself instead. The build employs an ESP32 as ...