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| When did supercapacitors start being used in consumer products? |
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| Shonky:
--- Quote from: Siwastaja on January 08, 2024, 01:59:26 pm --- --- Quote from: Shonky on January 05, 2024, 03:37:33 am ---Flash or EEPROM can easily --- End quote --- In 1980's, you didn't have those - so battery-backed SRAM was the usual way. They managed to build low-power SRAM so even small batteries lasted for years. Supercapacitors this early was news to me, too. BTW, battery-backed SRAM is still a thing, for example most STM32 MCUs have this feature. It's quite useful for some stuff, without having to think about erase/write times or endurance. --- End quote --- As per the original post that people don't seem to have read (or my reply): --- Quote ---(If so... why can't 21st century stoves, microwaves, and fridges, etc recall their dumb settings when a single cycle of AC goes missing? --- End quote --- |
| Siwastaja:
--- Quote from: Shonky on January 09, 2024, 01:44:24 am ---As per the original post that people don't seem to have read (or my reply): --- Quote ---(If so... why can't 21st century stoves, microwaves, and fridges, etc recall their dumb settings when a single cycle of AC goes missing? --- End quote --- --- End quote --- We were so amazed at the 1980's tech we missed the question. The answer is: they can, but the products are penny-pinched to the last drop, because the design teams are led by sadists who want to offer poor user experience. The cost of using a microcontroller with built-in EEPROM plus NRE cost to program it would be a few cents per microwave oven, but that leaves the clock reset problem. Adding a 32768Hz crystal + a supercap so that clock keeps the time during short outages would cost more, but still far below $1 (you would not need EEPROM, then, settings would be stored in battery-backed SRAM). Someone decided these few dozen cents are not worth spending. |
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