Radar was invented in the late 1800s by Heinrich Hertz, a German physicist, after whom the kilohertz was named.

Features like voice alerts, false-alert filtering, and four-directional detection can all help you avoid a dreaded speeding ...

The new Controlled Reception Pattern Antenna (CRPA) is part of the Digital GPS Anti-jam Receiver (DIGAR) system installed in ...

It is an old trope in submarine movies. A sonar operator strains to hear things in the ocean but dares not “ping” for fear of ...

When I wrote about a DIY ESP32-S3 internet radio last week, "raspbeguy" commented he'd rather choose an ESP32-based DIY DAB+ ...

Flash Bee is an easy-to-make DIY handheld lightning detector based on an ESP32-C3 board, a round display, and AMS AS3935 ...