DIY mystery box will wow your friends by hinting at what the ionosphere is up to

Shortwave radio enthusiasts are sure to know the problem: You're trying to tune in to your favorite global broadcast only to find that the signal is fuzzy. It might just be the conditions in the ionosphere, which you'd know if you built this DIY device. As detailed in a YouTube video and project writeup on Hackster, North Macedonian maker Mirko Pavleski built himself a wee machine that measures ambient RF energy across the shortwave band, using it as a rough proxy for