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The ELEGOO UNO R3 puts SDA and SCL pins beside the AREF. Besides, there are two new pins placed near the RESET pin. The ELEGOO UNO R3 board can be powered via the USB connection. ELEGOO UNO R3 Project Super Starter Kit with Tutorial.
Treedix ATmega328P CH340 Development Board Compatible with Arduino UNO R3 Board Kit for Starter with Cable : Electronics
ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino Review
MMOBIEL ATmega328P New Version UNO R3 Board with A16U2 Compatible with Arduino IDE Projects RoHS Compliant - Includes USB Cable : Electronics
Trouble reading Serial signal - Interfacing w/ Software on the Computer - Arduino Forum
Arduino UNO R4 Minima [ABX00080] - Renesas RA4M1 - USB-C, CAN, DAC (12 bit), OP AMP, SWD Connector : Electronics
100% compatible with the Arduino IDE. The ELEGOO UNO R3 controller board now uses a CH340C chip and SMD ATmega328p chip (same as Arduino UNO R3), with
ELEGOO UNO R3 Controller Board ATmega328P with USB Cable, Compatible with Arduino IDE
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The board is a microcontroller board based on the CH340. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 inputs, a 16
ATmega328P CH340 Development Board Compatible with Arduino UNO R3 Board Kit for Starter with Cable
UNO R3 Original Box ImProved Version Development Board Compatible With Arduino ATMega328P MCU Module USB Interface
ATmega328P chip MCU module Development board For Arduino RFID Starter Kit mega328 USB control board - AliExpress
Keyestudio UNO R3 Development Board Compatible With Arduino Uno R3 +USB Cable