Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | Renesas RA4M1 (ARM Cortex-M4) |
| Operating Voltage | 5V |
| Digital I/O Pins | 14 (6 PWM outputs) |
| Analog Input Pins | 6 |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Clock Speed | 48 MHz |
| Connectivity | USB-C, WiFi (WiFi version only) |
| Power Supply | 7-15V via VIN or 5V via USB |
| Dimensions | 68.58 x 53.34 mm |
Anonymous
Mar 25, 2026
Rating: 4/5
Great board, but pinout learning curve
Love the speed and the USB-C port. However, if you are used to the old AVR architecture, some peripheral libraries behave slightly differently. Once you get past that, it's fantastic.
Anonymous
Mar 25, 2026
Rating: 5/5
Huge upgrade from the classic Uno
The switch to the ARM Cortex-M4 processor makes a noticeable difference in performance. The extra memory allows for much more complex sketches without running out of space. Highly recommended for intermediate users.
Anonymous
Mar 17, 2026
Rating: 5/5
Best value for learning embedded systems
As a student, this board offers incredible value. The 32-bit architecture gives me room to grow before I need to jump to ESP32 or STM32 custom boards. Documentation is solid.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for IoT projects with WiFi
I bought the WiFi version specifically for a home automation sensor node. Setting up the WiFi connection was straightforward using the new Arduino WiFi library. Stable and reliable.
Anonymous
Mar 03, 2026
Rating: 5/5
USB-C is a game changer
Finally, an Arduino Uno that uses USB-C! No more digging for mini-USB cables. The board feels sturdy, and the LED matrix feature on the R4 is a nice bonus for debugging.
Anonymous
Mar 01, 2026
Rating: 4/5
Solid hardware, missing some legacy compatibility
The hardware is top-notch and very fast. Just be aware that some very old libraries written specifically for ATmega328P might need minor tweaks to compile correctly on the RA4M1.
Q: How much current can the 5V pin output?
A: The 5V pin can supply current derived from the USB source or the VIN regulator. When powered via USB, it is limited by the USB port (typically 500mA). When powered via VIN, the onboard regulator limits the total board consumption, so careful calculation is needed for high-draw peripherals.
Q: Does the IDE need to be updated to use the R4 boards?
A: Yes, you need Arduino IDE version 2.0 or later, and you must install the 'Arduino Renesas Boards' package via the Boards Manager to compile and upload code to the R4 series.
Q: Is this board compatible with existing Arduino Uno shields?
A: Yes, the Arduino UNO R4 Minima/WiFi maintains the standard Uno form factor and pinout, making it compatible with most existing shields designed for the Uno.
Q: What is the main difference between the Minima and the WiFi version?
A: The primary difference is that the WiFi version includes an integrated ESP32-S3 module for wireless connectivity, while the Minima version does not have built-in WiFi or Bluetooth.
Q: Can I power this board with a 9V battery?
A: Yes, you can power the board via the VIN pin or the barrel jack connector (if using a shield adapter) with a voltage range of 7V to 15V, so a standard 9V battery works perfectly.
Commercial Roast Duck Warmer Display Cabinet, Countertop Heating Unit for Crispy Pork Belly, Roast Meat, and Goose
$444.50
Variable Frequency Drive 7.5KW Brand New Original
$2,312.00
Inverted Water Dispenser Stand for Pure Water, Office Drinking Water Rack, Convenience Store and Supermarket Shelf
$116.79
RSL Electric Guitar Series by Rockschool - ABRSM Edition 2018 Update, Grades 0-8 Complete 9-Volume Set
$30.00
Handmade Soap and Baking Cake Silicone Mold - Round 6-Cavity
$16.50
Meile Childhood Sponge Stamp Set - Kids' Paint Printing Tools with Sponge Brushes for Kindergarten Art
$14.30
2019 Jiangxi Isuzu Ruimai Lingtuo DMAX - Brand New Original Thickened Wear-Resistant Tires
$302.80
Pirelli P7 Run-Flat Tires 225 245 255 275 35 40 45 50 R17 18 19 20 21
$340.00
Lint-Free Industrial Wiping Cloth - Oil-Removing Absorbent Paper for Car Paint Wax and Grease Removal
$123.00
Henkel Loctite 495 Adhesive Genuine 401 406 416 460 496 Instant Glue Strong Industrial Adhesive for Metal and Plastic
$6.00
Industrial Ultrasonic Emulsification and Dispersion System - Anti-Foam Vibration for Pipeline Inner Wall Cleaning
$31,250.00
Commercial Small Electric Food Warmer Display Case for Fried Chicken, Burgers, Pies, Egg Tarts, and Youtiao - Constant Temperature Heating Cabinet for Breakfast
$623.00
Universal Triangular Stand for Mineral Water Bottles – Inverted Dispenser Rack for Water Coolers and Bottled Water Extraction
$5.10
Manufacturer Supply By-Product Cleaning Equipment, Fully Automatic Cylindrical Pig Tripe Degreaser and Cleaner for Cattle and Sheep Stomachs
$1,600.00
CANDLE.LAB | DIY Aromatherapy Candle Supplies, Natural Refined White Beeswax Pellets, Handmade Soap Materials #27
$9.00
![No-Shave Hair Transplant by Yongxiang Dean Team [Premium Customization], Unlimited Graft Count, Pain Management for Transplant Area](https://www.gosteppe.com/cache/small/product/269234/legacy-main-b28b879c33f1fe08b5eba226.webp)
No-Shave Hair Transplant by Yongxiang Dean Team [Premium Customization], Unlimited Graft Count, Pain Management for Transplant Area
$200,000.00
Kitchen Sink Drainage Mat - Sloped Countertop Drying Pad with Foldable Narrow Edges, Faucet Splash Guard, Storage Mat
$3.57
UE5 Unreal Engine 5.2-5.7 Physical Assembly System Physics Plugin
$0.50
![[Damai Holds Micro-Needle Hair Transplant Patent] Female Hairline | Non-Shaven Transplant 1000 Units | Forehead](https://www.gosteppe.com/cache/small/product/269231/legacy-main-b004541637d9aaa9d8c19288.webp)
[Damai Holds Micro-Needle Hair Transplant Patent] Female Hairline | Non-Shaven Transplant 1000 Units | Forehead
$17,000.00
Air Baffle for ABB ACS550-X2 R8 IP21 VFD
$3,450.00
Outdoor Waterproof Shockproof EDC Storage Box, Sealed Gear Case for Small Items
$5.10
Zhizhi Lin Zexu Small Regular Script Diamond Character Card Kaishu Copybook Porcelain Blue Gold Characters Brush Calligraphy Practice Folding Card
$68.00
Maotaizi Dual-Tip Dual-Color Glitter Markers for Kids - Non-Toxic Soft Tip Colored Pens for Elementary Art
$16.90
Tire Removal Socket Wrench and Spare Tire Tool Kit for Zhengzhou Nissan Paladin, Aoting, and Dongfeng Ruiqi Pickup Trucks
$16.90
Zhimo Ke Xingkai Technique Calligraphy Copybook - Upgraded Edition with Text, Images, and Video Tutorials for Beginners
$30.60
Small-Scale Yogurt Processing Production Line, Blended Yogurt Fermentation Equipment, Organic Milk Filling Machine
$115,920.00
Compact Manual Hot Stamping Machine for Logos, Business Cards, Leather Wallets, Plastic, and Wood - Heat Embossing and Branding Tool
$500.76
DIY Handmade Soap Mold – Single Square Silicone Mold for Homemade Soap
$1.96
Wall-Mounted Facial Towel Dispenser Transparent Upside-Down Design
$4.50
Colorful Ground Thread Inserts 16ER/IR1.0/2.0/3.0/3.5 ISO AG55/60 for High-Hardness Quenched Steel
$19.80
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
