Published 27 Oct 2026

Uno R3 (clone)

\\ {{ electronic:boards:arduino:pa274406a.jpg?200|Uno R3 (clone) overview}} ^ Module Description || ^Model|**Uno R3**| ^Manufacturer|made in China| ^Brand|-| ^Clone of|Arduino Uno R3| ^Description|Standard Uno| ^USB-to-serial chip|Atmel Mega16U2| ^Voltage|5V| ===== Overview ===== This is a no-name Arduino Uno R3 clone with the ATmega16U2 used as USB-to-serial interface as in the genuine Uno, rather than the cheaper alternatives used in lots of clones. So perhaps a slightly better build quality than the average clone. ===== Features ===== * Microcontroller: Socketed (for easy replacement) ATmega328P * Clock Speed: 16 MHz ceramic resonator * 14 digital input/output pins (6 can be PWM outputs) * 6 analog inputs * Operating Voltage: 5V * Input Voltage: 7-12V * 3.3V Power Out: up to 50 mA * I/O Pin Out: up to 20 mA * Digital I/O Pins: 14 (6 support PWM output) * Analog Input Pins: 6 (with 10-bit resolution) * Flash Memory: 32 kB (2kB used by bootloader) * SRAM: 2 kB * EEPROM: 1 KB * Serial I/O: 4 UARTs, one SPI and one I2C interface \\ ---- ===== Schematics ===== {{electronic:boards:arduino:uno_pighixxx.png?800|Arduino Uno R3 pinout}} ((from https://web.archive.org/web/20171110175921if_/http://www.pighixxx.com/test/wp-content/uploads/2014/11/uno.png CCBYSA Alberto Piganti)) {{electronic:boards:arduino:a000066-schematics.png?800|Arduino Uno R3 schematic}} ((from https://docs.arduino.cc/resources/schematics/A000066-schematics.pdf CCBYSA Arduino.cc)) \\ ---- ===== Examples ===== {{electronic:boards:arduino:pa274406a.jpg?800|Uno R3 (clone) overview}} {{electronic:boards:arduino:pa274407a.jpg?800|Uno R3 (clone) overview rear}} {{electronic:boards:arduino:pa274403a.jpg?800|Uno R3 (clone) top view}} {{electronic:boards:arduino:pa274405a.jpg?800|Uno R3 (clone) bottom view}} \\ ---- ^Genuine Arduino Uno R3 :^ {{electronic:boards:arduino:arduinouno_r3_front.jpg?800|Genuine Arduino Uno R3 top view}} ((from https://www.arduino.cc/en/uploads/Main/ArduinoUno_R3_Front.jpg CCBYSA Arduino.cc)) ====== References and Additional Resources ====== * [[https://docs.arduino.cc/hardware/uno-rev3/|Arduino Uno R3 official page]] * {{https://docs.arduino.cc/resources/schematics/A000066-schematics.pdf|Arduino Uno R3 schematic}}

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