this post was submitted on 14 Aug 2023
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Today, you can buy microcontrollers with this much RAM + Flash-ROM for like $5 USD. No joke.
https://www.digikey.com/en/products/detail/renesas-electronics-america-inc/R7FA4E10D2CNE-AA0/15203348
https://www.digikey.com/en/products/detail/microchip-technology/ATSAM4N8BA-MU/4162590
These modern $5 microchips probably have more features people care about too. Also they go like 100MHz on 3V and like 50mA (or less) of current. Or ~150mW of power or so and are therefore suitable to be run off of AA batteries.