I'll try to post some pictures. I have one of about six turkeys, at least four are toms, that I took last December over a food plot. At the end of deer season I set up two blinds to hunt turkey over that food plot this spring. I went back last weekend and the food plot was gone, as in the plants had disappeared. So of course the turkeys were no longer coming around.
I don't use a refresh pulse. My understanding is the refresh keeps the flash fully charged and keeps the camera from going to sleep. The Discovery 90's don't go to sleep when left on and I've never felt a great need to top off the flash charge.
If I understand your page correctly, I could use a two wire system on the Discovery 90. The way I'm thinking I could jumper between the purple and white wires (conection 1 and 2 on your page) and run one wire from either of those two and one from the common connection. When the two wires are shorted together the camera should fire. Tell me if I'm completely off track on this. I definately appreciate your leg work on this cam.
You are correct. The white and purple can be connected internally and only two wires brought out. I'm working from memory, but as I recall the camera will still work as a conventional camera with a two wire connection.