This article explains an upgraded smart solid-state AC switch system that uses microwave Doppler radar instead of traditional PIR sensors.

I recently picked up a couple of microwave motion sensor radar modules. You have seen (and perhaps tried) it before. This post is about the HFS-DC06 (DC5V/5.8GHz) Microwave Radar Sensor Switch Module!

When you can package a radar system in a 10- × 10-mm chip, you end up with a new type of sensor that was unimagined a few years ago. Today, it’s becoming common practice to use a radar chip for some ...