/diy/ - Do It Yourself

>>2764889
Unironically a 6-8 pin microcontroller with built-in EEPROM. Because you can't buy discrete floating gate transistors, flash/eeprom memory cells, or feram memory cells.

Storing a bit with a few microfarads of very low-leakage capacitance across the gate of a mosfet might work fine for months or even years, so long as you're careful to prevent leakage currents in/out of the gate while it isn't powered on, pic related.