After reading the new sensor wiki, I'm reminded of a robot I've been planning, that relies on temperture measurments. Basically I want the robot to act like a photovore, only looking for heat instead of light. Is there a way to sense heat at a distance (6-10 feet)?
you get what is called Black body radiation, whereby all things that radiate heat also radiate Infra-red waves. Its the principle of how IR imaging works. Hook an IR photodiode up to an ADC and calibrate it and you’ll have a somewhat cheaper sensor than the one linked above!