Or rather, my ability to tell the difference between "11" and "1" seems to be lacking! Helps to search for the right thing!
That's very interesting crutschow, I'm pretty sure it would be adequate. I have a grand total of 3 standard opto's in my junk box, I was going to start experimenting with them. It's so that I can get a positive regulated psu to track an identical psu in a + 0 - configuration. The slave needs to be isolated because it's reference point moves in relation to the master's ground as it's voltage changes. Caused a lot of head scratching because I couldn't figure out why my slave psu had turned into a schmitt trigger! Heigh ho...