The unit and accompanying application overlays 64 different temperature zones on your camera view in real time. The effect is not only useful — it has a cool 8-bit look too. He created this solution to detect heat escape points in his old house because he couldn’t afford a professional thermal detector camera.
The best part is that he’s making his thermal imager open source. If you want one, it would only cost you $US150 to make it, which is peanuts compared to professional equipment. [Instructables via Rob Hopeless via Engadget via Petapixel]