This is a rerun of video #135 from December 2016. During my summer break, I show some (hopefully) wellaged videos of my channel.
The invention of radar influenced the way World War two went because it was possible to detect planes of the enemy and shoot them down. And since then, this technology made civil aviation as we know it possible because it can detect the movement of metallic surfaces over distance. Of course, technology can also be used against us, for example, if we are trapped while speeding…

Links:
HWMS03: https://s.click.aliexpress.com/e/_DkU...
RCWL0516 (Works also with 3.3 volts): https://s.click.aliexpress.com/e/_DkU...
XYCWBD1: https://s.click.aliexpress.com/e/_DDb...
HFSDC06:https://s.click.aliexpress.com/e/_DEA...
220V Switch (SK600): https://s.click.aliexpress.com/e/_DF7...

http://www.rogerclark.net/investigati...
https://github.com/jdesbonnet/RCWL0516/
Big Clive:    • How microwave body detectors work.  W...