Here’s what we know about the MAX30105 air particle sensor. There are three LEDs inside this chip (red, IR, and green), and an optical sensor underneath a piece of glass.

I recently had a project where I needed such a sensor, and I picked up a TF-MiniS, which is a popular IR distance sensor. They aren’t very expensive, and they work serial or I2C. So how did it do?

So how do those cameras work? By definition, a thermal camera is a non-contact device that detects infrared energy (heat in this case) and converts it into a visual image.

Researchers have finally figured out how mosquitoes see humans in the dark: They detect infrared light the body generates via heat.