moduel detector

[kosacid]

this is just for a bit of fun but i wonder if wee can design a detector just of parts from say banggood or other sites, and no cheating lol, also good for people who soldering skills aren't so good
here is a example
https://www.banggood.com/NE5532-OP-A...l?rmmds=search

https://www.banggood.com/DC-1-Channel-1-Route-IRF540-MOSFET-Switch-Module-For-Arduino-p-1178796.html?rmmds=search

https://www.banggood.com/5pcs-RCWL-0516-4-28V-3mA-Microwave-Radar-Sensor-Human-Body-Induction-Switch-Module-Detector-p-1193425.html?rmmds=search

https://www.banggood.com/DC-5-12V-Adjustable-Delay-Timer-Switch-NE555-Relay-Shield-Module-p-1079519.html?rmmds=search