The 30-pin SIMM shown above is capable of storing up to (hold on to your chairs…) 16MB but due to limited amount of available IOs on the Atmega328p only 256KB can be used.

The Arduino Uno-compatible board has an MCS-51 (often called 8051 instead) instead of the usual ATmega328P/ATmega168. Specifically, [ElectroBoy] uses the AT89S52 .

Binary watch features ATmega328P and Arduino 10:45 am February 8, 2023 By Julian Horsey If you would like to build your very own binary watch you might be interested in a new project published to ...

The Arduino Uno R4 is to have a Renesas RA4M1 32-bit Arm Cortex-M4 microcontroller, ... according to Arduino, which estimates that R4 will deliver a 3x performance boost over the 8bit ATmega328P ...