Introducing the Arduino UNO R4 Minima! This board boasts the RA4M1 microprocessor from Renesas, delivering increased processing power, expanded memory, and additional peripherals. And the best part? It stays true to the reliable UNO form factor and operates at a practical 5 V voltage. Brace yourself for an upgrade like no other with the Arduino UNO R4 Minima!  

Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language.  

Arduino Nano 33 IoT with headers

ARDUINO YUN REV 2 ABX00020 ATmega32U4 Development Board