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Dr. Masahiko Inami, a professor at the University of Tokyo’s Research Center for Advanced Science and Technology, recently tweeted a picture of an incredibly small, homebrewed 3D-tracked sensor module ...

Recently, I exhausted my stock of common passive infrared (PIR) motion sensor modules and was looking for a new one to play with. I searched the web for a small type with self-contained electronics.

Nowadays, numerous electronic sensor modules are available on the market that can be combined with inexpensive microcontroller boards to measure environmental parameters of importance. The project ...