What is the difference between these two items? I accidentally burned out one of these little units (the kind with the sensor and LED mounted right next to each other inside a small package) and went to digikey to replace it. I ordered a phototransistor from the catalog only to notice later that what I had use previously was *actually* a photointerruptor. (It came out of a CDROM drive head, paired with an optical encoder disc.) I noticed the difference because one package has a beveled corner and the other is totally square.
I suspect that a photointerruptor outputs discrete 0 or 5V logic levels, where as the phototransistor varies continuously. Correct? Please comment