Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Microcontroller	Renesas RA4M1 (ARM Cortex-M4)
Operating Voltage	5V
Digital I/O Pins	14
PWM Pins	6
Analog Input Pins	6
Flash Memory	256 KB
SRAM	32 KB
Clock Speed	48 MHz
Connectivity	USB-C & ESP32-S3 (WiFi Edition)
Dimensions	68.58 x 53.34 mm

5 reviews

Anonymous

Mar 10, 2026

Rating: 4/5

Great Board, Learning Curve

Hardware is solid. Took me a bit to adjust to the new IDE support compared to the old AVR boards, but worth it.

Anonymous

Mar 01, 2026

Rating: 5/5

Excellent Upgrade

The R4 Minima is a fantastic upgrade from the classic Uno. The increased memory and speed make handling complex sketches much smoother.

Anonymous

Feb 26, 2026

Rating: 5/5

Perfect for Education

Using these for my robotics class. The USB-C port is much more durable for student use than the old Type-B.

Anonymous

Feb 19, 2026

Rating: 5/5

Genuine Arduino Quality

Received the original board as described. Pinout compatibility with existing shields saved me a lot of time.

Anonymous

Jan 26, 2026

Rating: 5/5

WiFi Connectivity is Stable

I bought the WiFi edition for an IoT project. Connecting to my home network was straightforward using the Arduino IoT Cloud.

5 FAQ

Q: Is a USB cable included in the kit?

A: Yes, the kit includes a USB-C to USB-A cable for programming and power supply.

Q: What version of Arduino IDE is required?

A: We recommend using Arduino IDE 2.0 or later to ensure full support for the RA4M1 microcontroller architecture.

Q: Is this board compatible with existing Uno shields?

A: Yes, the UNO R4 maintains the same form factor and pinout as previous Uno boards, ensuring shield compatibility.

Q: Does the Minima version include WiFi capabilities?

A: No, only the WiFi Edition includes the ESP32-S3 module for wireless connectivity. The Minima is USB only.

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

A: Yes, you can power the board via the VIN pin or barrel jack with a voltage between 6V and 24V.

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