Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin	-
Microcontroller	ATmega328P
Operating Voltage	5V
Digital I/O Pins	14 (6 PWM outputs)
Analog Input Pins	6
DC Current per Pin	20 mA
Flash Memory	32 KB (0.5 KB used by bootloader)
SRAM	2 KB
EEPROM	1 KB
Clock Speed	16 MHz
USB Interface	USB Type-B

6 reviews

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for beginners and pros alike

This is the gold standard for microcontroller boards. The build quality is excellent, and it works flawlessly with the Arduino IDE. I used it to build a home automation sensor node, and the stability has been impressive.

Anonymous

Mar 10, 2026

Rating: 4/5

Reliable workhorse

We have dozens of these in our makerspace. They take a beating from students and keep working. Only giving 4 stars because the included USB cable was a bit short, but the board itself is perfect.

Anonymous

Mar 08, 2026

Rating: 4/5

Great board, minor packaging issue

The board functions perfectly and uploads code without errors. The anti-static bag was slightly torn upon arrival, but the board was unaffected. Performance is exactly what I expected from an original Arduino.

Anonymous

Mar 08, 2026

Rating: 5/5

Standard for a reason

You can't go wrong with an Uno R3. It's compatible with almost every shield out there. I use it for rapid prototyping before moving to custom PCBs. The voltage regulation is stable.

Anonymous

Mar 06, 2026

Rating: 5/5

Genuine product, fast shipping

I was worried about getting a clone, but this is definitely the original. The chip markings are correct, and the USB connection is solid. Great for teaching my students the basics of C programming.

Anonymous

Mar 05, 2026

Rating: 5/5

Easy to get started

As someone new to electronics, this kit made learning very approachable. The community support is huge, so finding code examples for any project is easy. Highly recommended for learning.

5 FAQ

Q: Is this suitable for controlling high-voltage appliances?

A: No, the board operates at low voltage (5V). To control high-voltage appliances, you must use intermediate components like relays or optocouplers to ensure safety and prevent damage to the microcontroller.

Q: Can I power this board with a 9V battery?

A: Absolutely. You can connect a 9V battery to the barrel jack or the Vin and GND pins. The onboard regulator will step it down to the required 5V.

Q: What is the maximum current I can draw from the 5V pin?

A: When powered via USB, the total current available is limited by the USB port (typically 500mA). When using the external power jack, you can draw more, but ensure you do not exceed the regulator's limits, generally around 800mA total for the board and peripherals.

Q: Does this come with a USB cable?

A: Yes, the kit includes a standard USB Type-A to Type-B cable for programming and powering the board via your computer.

Q: Is this board compatible with the Arduino IDE?

A: Yes, this original Arduino UNO R3 is fully compatible with the latest version of the Arduino IDE on Windows, Mac, and Linux.

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