![]() Who Else Thinks it Would be Handy if a Raspberry Pi Could Use Infrared to See if Someone’s There?īy using a component that’s wonderfully cheap, available, durable, reliable, and economical with power, we can do just that! ![]() Though fire reaches a high enough heat that it will visibly give out light, our bodies don’t, and the light we give out – infrared – can’t be seen by the human eye. While that might sound odd, you’re likely already familiar with something similar: fire, which gets so hot it casts heat and visible light. This interests device builders partly because people, animals, and objects always broadcast infrared light. It’s called “infrared” because it occurs beyond the red edge of the visible light spectrum. Infrared is a kind of light we can’t see without special equipment, but we sometimes feel as heat.
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