Last week, I went on an adventure through the electromagnetic spectrum! It’s like an invisible world that always surrounds us, and allows us to do many amazing things: It’s how radio and TV are transmitted, it’s how we communicate using Wi-Fi or our phones. And there are many more things to discover there, from all over the world. In this post, I’ll show you fifty things you can find there – all you need is this simple USB dongle and an antenna kit! The “Make 50 of Something” technique A couple ...