Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | Renesas RA4M1 (ARM Cortex-M4) |
| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7-12V |
| 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) |
| Dimensions | 68.6 x 53.4 mm |
Anonymous
Mar 31, 2026
Rating: 4/5
Great board, WiFi setup takes patience
The Minima version is solid, but I bought the WiFi version expecting instant connectivity. While the hardware is excellent, getting the WiFi libraries configured took some troubleshooting. Once working, it's very stable for IoT projects.
Anonymous
Mar 24, 2026
Rating: 5/5
Smooth transition for legacy code
I was worried my old sketches wouldn't compile, but the Arduino IDE handled the migration seamlessly. The 48MHz clock speed makes real-time data logging much smoother. No lag whatsoever.
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for university labs
We ordered twenty of these for our introductory robotics course. The USB-C port is a welcome change, and the backward compatibility with most shields means we didn't have to replace our existing inventory. Students love the increased processing power.
Anonymous
Mar 16, 2026
Rating: 5/5
Huge upgrade from the classic UNO
The switch to the ARM Cortex-M4 processor makes this board significantly faster than the old ATmega328P models. The extra memory allows for much more complex projects without running out of space. Highly recommended for anyone looking to step up their embedded game.
Anonymous
Mar 10, 2026
Rating: 5/5
Best value for WiFi projects
Compared to buying a separate ESP module and an UNO, this all-in-one solution saves so much breadboard space. The built-in WiFi is robust and the power management seems improved over previous generations.
Anonymous
Mar 03, 2026
Rating: 4/5
Powerful but documentation could be better
This is my first ARM-based Arduino. It's incredibly fast, but some of the advanced peripheral features aren't as well documented as the older boards yet. Still, for standard GPIO and PWM tasks, it works flawlessly.
Q: Does this support 3.3V logic levels?
A: The board operates at 5V logic levels like the classic UNO. While it has a 3.3V output pin for powering sensors, the I/O pins are 5V tolerant but not native 3.3V logic. Use a level shifter for strict 3.3V devices.
Q: Is this board compatible with existing Arduino UNO shields?
A: Yes, the UNO R4 maintains the same form factor and pinout as previous UNO boards, making it compatible with most standard shields. However, always check voltage requirements for specific sensors.
Q: What is the difference between the Minima and WiFi versions?
A: The hardware core is identical. The WiFi version includes an integrated ESP32-S3 module for wireless connectivity, while the Minima version does not have built-in wireless capabilities.
Q: Which IDE version do I need to program the R4?
A: You need Arduino IDE 2.0 or later, or the web editor, with the appropriate 'Arduino Renesas Boards' package installed via the Board Manager.
Q: Can I power this board via the USB-C port?
A: Absolutely. The UNO R4 series uses USB-C for both programming and power supply. It can also be powered via the barrel jack or the VIN pin.
Colored Pencil Set, Basswood Hexagonal Raw Wood Pencils for Painting and Art Coloring
$21.68
Small Ceramic Herb Jar – Imperial Yellow Hexagonal Double-Layer Container for Angong Niuhuang Wan Pills
$8.80
Spanish Brush Master ESCODA PERLA Pearl White Toray Nylon Round Watercolor Brush, Short Handle 1430
$44.20
Qiwei COD Rapid Detector QW-COD-T/B - Chemical Oxygen Demand Tester with Potassium Dichromate Digestion for Wastewater
$3,330.16
Natural Wheat Straw Baby Rattle - Children's Musical Instrument Toy, Maraca, Shaker Bell for Newborns - Orff Music Instrument
$10.80
CANDLE.LAB | 100% Cotton Unwaxed Candle Wick Roll - Thin Stem Chandelier Candle Making Supplies #31
$25.00
Pneumatic Rotary Vibrator - Feiyu GT25 Pneumatic Vibrator - Quality Guaranteed
$997.00
Quick-Frozen Vegetable Deodorizing Sterilization Washer IRW Zhongfang Ready-to-Cook Vegetable Production Washing Line Semi-Finished Vegetable Processing Oxygen Equipment
$27,000.00
KETELES 105R7120 Carbon Fiber Road Bike - Lightweight Racing Bicycle with Gear Shifter
$11,339.00
Natural White Crystal Sugar Cube DIY Crystal Jewelry Accessories Materials Irregular White Crystal Blocks
$2.50
Foldable Silicone Brush Washing Bucket - Portable Water Container for Calligraphy and Painting Students
$8.42
Cute Cartoon Bird Ceramic Brush Washer - Decorative Pen Cleaning Cup and Photo Prop
$12.60
Kitchen Storage Rack with Drainage Tray – Organizer for Dishcloths, Faucets, Sink Areas, and Dishwashing Supplies
$4.15
Sheng Y Graffiti Paint Brush Set, Children's Stationery Kit with Art Watercolor Pens, Factory Direct Gift Supplies
$49.10
Ningbo Manufacturer Display and Storage Rack, Wall-Mounted Tire Storage for Home Garage, Customizable Wall Tire Rack
$237.60
Universal Low-Temperature 3D Printing Pen Filament PCL, Eco-Friendly Material Wire 1.75mm Compatible with Deli Pens, 40 Color Options
$3.80
Automatic Feeder - Stainless Steel Food Machinery Accessory Equipment
$20,150.00
Henkel Loctite Super Glue Series: 401, 406, 460, 480, 495, 4011, 4161, 496, 382, 410
$28.00
Over-Toilet Storage Rack with Tissue Organizer for Bathroom, Vanity, and Shower Gel - Multi-Use Bathroom Shelf
$27.66
15-inch Carbon Fiber FPV Drone Frame - High-Strength Quadcopter Aerial Photography Chassis Direct Sale
$396.44
Petal-Shaped Ceramic Tea Scoop and Holder for Gongfu Tea Ceremony
$97.00
Scented Candle Waxing Cotton Wick with Base Wick Fixer Sticker DIY Materials
$0.35
Stainless Steel Fish Tank Converter - Bucket to Aquarium Adapter with Inverted Stand and Faucet Spout for Mineral Water Jugs
$13.58
Non-woven Cleaning Cloths, Lint-free Wiping Rags, Oil-absorbing Paper, Machine Cleaning Cloth, Dust Removal Cloth for Subway Use (No Washing Required)
$138.00
Large Paint Brush Set - Watercolor Pen Kit for Children's Day Art and Drawing
$31.25
Foldable Car Tire Stone Removal Tool, Explosion-Proof Scraper Hook for Extracting Pebbles from Tires
$19.53
Black Swan Watercolor, Gouache, and Acrylic Paint Brush Set - Professional Art Painting Tools for Numbered Paint-by-Number Kits
$6.80
Jiangchuan 800 Roll-to-Roll Oil-Heated Roller Heat Transfer Machine – Digital Sublimation Printer for Curtain Fabric Rolls
$147,743.75
Traditional Handcrafted Wooden Rattle for Newborns – Safe for Teething, Intangible Cultural Heritage Toy
$10.10
All-Season Quiet and Comfortable Vacuum Tires for Buick Enclave 2013-2014 - Custom Fit, Wear-Resistant
$458.00
![[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)
