View Full Version : IR Detector/Emitter

09-01-2006, 11:23 PM
I'm working on a project similar to the one described here:


If you don't feel like reading, it basically involves controlling a solenoid valve with a BS2 in a paintball gun.

My question involves "eyes".· These "eyes" will consist of an IR Detector and an IR Emitter.··They would be of a·break beam type, meaning that when a paintball is in the breech, it will·block the IR detector's view of the IR emitter. The entire goal of these "eyes" is to keep the gun from "chopping" paintballs at high rates of fire. In any event, I'm trying to size the emitter and detector and having some trouble. I want each unit packaged in either a 3mm or 5mm (T1 or T1 3/4, I believe) LED package.·Also, the detector and emitter need to be able to work together properly at a distance of ~.75" apart. Outside light is not a factor. I don't know what other parameters I need to size them. As such, any help would be GREATLY appreciated.· Thanks in advance.

Ben http://forums.parallax.com/images/smilies/roll.gif

09-05-2006, 09:33 PM
Here's a link to what I'm looking to make:


I figured I could make a set or 2 for around or less than $5/set, thus saving me $15/set.·It would also add to the amount of this project that was built "from scratch".