Well here is one: Use a selenium-coated laser printer drum pretty much as intended. Impart a charge on it's surface, fire laser to erase charge for a
0 or leave it for a 1, then use some kind of electrometer to read the bit later. Recycle this back to the laser for recirculating memory.I'm wondering if there is any way to make a large scale CCD shift-register memory which can be made at home. I'm imagining tin-foil electrodes glued to some kind of reasonably high-mobility but fully-depleted material.. but is there such a material besides a single-crystal semiconductor?
Hmm, which reminds me: does anyone have a good description of how bucket-brigade devices really work? The equivalent schematic the datasheets always show can not possibly work (the mosfet switches will cause charge to be shared between the two capacitors they connect, and not moved in one direction: you would need buffers between stages for the discrete device version of this to work).