re long distance ir detection sburton dres dnd ca stan burton writes i would like to be able to detect the angular position low accuracy of an ir emitting source at a distance of about meters more is better in daylight the ir source could be emitting a signature i m leaning toward khz square wave with duty cycle i designed and built hardware in that would output a logic level from a tone detector upon detecting a microwatt led feet away used a motorola mrd biased linearly in a dc feedback loop to servo out variations in sunlight and hz from lights used no lenses allen sullivan
