Luckily there was a 5v microcontroller in the parts bin for easier interfacing with this Soviet NMOS SRAM chip.

This NMOS SRAM chip seems impervious to light. I’ve had it exposed for several minutes with zero bit flips.

@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.

@th every transistor is a phototransistor at the right wavelength and intensity

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