Why aren't you phototransisting?
@bikerglen I was hoping for visible, like the Cyclops camera. maybe it does require DRAM and the SRAM isn't sensitive enough.
@th I haven't had a device physics class in ages but maybe try an IR flashlight or IR remote control? DRAM you're trying to change the charge on a capacitor. SRAM you're trying to change the charge running between two back-to-back inverters. That sounds significantly more challenging. Might have to change charge in a pattern to get all four transistors to flip to the correct state. Don't really know. Just throwing out some possibilities.
@th Btw, thanks for the link to the article on the Cyclops camera a few weeks ago. I read it. Unfortunately my scope only has a blanking input in X-Y versus a true intensity control so I'd have to settle for a green/white vs green-scale image.