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!

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

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." From the May 2021 issue of Car and Driver [Ed. note—This story was updated in October 2023.] "Do you know ...