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

Arduino Uno Components Required: Arduino Uno (or any compatible board) DHT11 Temperature and Humidity Sensor 16x2 LCD Display 10kΩ Potentiometer (for LCD contrast adjustment) Breadboard and Jumper ...

The Arduino UNO R4 boasts a 3x performance increase over the UNO R3 and , in addition, SRAM has been upgraded from 2kB to 32kB, and flash memory from 32kB to 256kB to support more complex projects.

Arduino has announced the new UNO R4 board family for prototyping and learning. The new models feature a faster microcontroller, a USB-C connector, improved power, Wi-Fi and Bluetooth LE, and more.

This second version – Rev2 – of the Arduino Uno WiFi board is functionally the same as the Arduino Uno Rev3, but also comes with built-in WiFi, enabling easy connection to the Internet, plus the ...

Massimo Banzi, co-founder and chairman of Arduino, announced the UNO R4 during Arduino Day 2023. He believes the UNO R4 is a new chapter in the UNO story and the perfect way to move forward, ...