ELEGOO UNO R3 Board with USB Cable

DIY Projects

	UNO R3 Board	MEGA 2560 R3 Board	Nano V3 Boards	3PCS ESP32 Boards	UNO R3 Super Starter Kit	ESP-32 Super Starter Kit	UNO R4 WiFi Starter Kit
Customer Reviews	5,053	3,327	284	555	16,627	216	57
Price	$16.99	$22.99	$15.99	$19.99	$42.99	$36.99	$52.69
Compatible with Arduino	✔	✔	✔	✔	✔	✔	✔
Connection	USB	USB	USB	WiFi; Bluetooth; USB	USB	WiFi; Bluetooth; USB	WiFi; Bluetooth; USB
Digital I/O Pins	14	54	14	25 (4 input-only)	14	25 (4 input-only)	14
Target	Programming/Robotics Starter	Programming/Robotics Starter	Programming/Robotics Starter	Programming/Robotics Starter	Programming/Robotics Starter	Programming/Robotics Starter	Programming/Robotics Starter
Feature	Best for General Projects	Ideal for Complex Projects	Small Size for Portable Use	Built-in Wi-Fi & Bluetooth IoT	Best for General Projects	Built-in Wi-Fi & Bluetooth IoT	Upgraded CPU, More Memory

The computer cannot recognise the UNO R3 board?

Please check if your computer makes a new device recognition sound when the board is plugged in. If not, use another USB cable to connect to another USB port. Please connect the UNO board to another computer to make sure it is not a computer problem.
The UNO board heats up when it is powered on?

Please disconnect all connections to the control board and try to use another USB cable to check the problem. If there is still a problem, please send us a picture of the heating area for troubleshooting.
Unable to upload code to UNO board?

(1) Please make sure you have selected the correct board type and port #COM.

(2) When you press the reset button, does the LED flash two or three times? If not, it may be that the bootloader is broken.

Or just reach out to us.
Do I need extra parts to start?

No. The board and USB cable are included. You can start programming right away.
Is this suitable for 12+ students?

Yes. Recommended for learners under 12 with adult guidance as needed.

START CODING WITH THE ELEGOO UNO R3: Connect the included USB cable, upload your first sketch, and build sensor, motor, display, and automation projects, making it a practical controller for maker desks, classrooms, coding clubs, and robotics labs
ATMEGA328P CORE FOR EVERYDAY PROJECTS: A 16 MHz clock, 32 KB flash, 14 digital I/O pins with 6 PWM outputs and 6 analog inputs provide a versatile foundation for LEDs, buttons, relays, servos, displays and sensors
RELIABLE USB PROGRAMMING AND CLEAR WIRING: The ATmega16U2 USB interface supports sketch uploads and serial communication, while clearly labeled headers help simplify connections to jumper wires, shields and modules
POWER AND EXPAND YOUR WAY: Run the board from USB or a recommended 7-12 V external supply, then add compatible shields and modules for data logging, automation, robotics, test fixtures and custom electronics projects
BOARD AND USB CABLE INCLUDED: Comes with 1 ELEGOO UNO R3 development board and 1 USB-A to USB-B data cable; breadboard, sensors, shields and power adapter are not included, and younger learners should work with an experienced adult