Sometimes, a person has a reason to track a target. A popular way to do this these days is with a camera, a computer, and software to analyze the video. But, that lends itself more to automated systems, like sentries. What if you want to be able to target something by “painting” it with a…

via Infrared Targeting On a Small Scale — Hackaday

Source: http://www.leafmakes.com/threeseek/

Source: http://www.leafmakes.com/threeseek/

Source: http://www.leafmakes.com/threeseek/