3 ms·

Thanks for your response. So, you could use a small IR LED in outdoors in daylight to find objects less than X yards away. I wonder how to calculate X. I sup

Thanks for your response. So, you could use a small IR LED in outdoors in daylight to find objects less than X yards away. I wonder how to calculate X. I suppose you'd need 3 light sensors to determine direction. I wonder how far apart they need to be. The rotating reticle sounds interesting. Wouldn't that prevent false positives from the sun?

nabla9 13y ago
You should use optical filters if possible to filter unwanted wavelengths and receiver should have relatively narrow field of view. The main goal would be to detect difference from the background. Rotating reticle would be really good idea if you can make it work mechanically. You would need only one light sensor to detect direction if you use reticle. See: http://wiki.scramble.nl/index.php/Sidewinder_article#Reticle http://wiki.scramble.nl/index.php/Sidewinder_article#Reticle Simple C type reticle would be enough to separate target from the background and find out the direction of the target.