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.
Candy Naoko Gujima Mr. Saxophone City Pop Sheet Music with Accompaniment Demo
$37.00
Multi-Color Detachable Water Bucket Stand - Office Purified Water Dispenser Holder (Inverted)
$60.95
Oil-Based Original Strong Fast-Drying Adhesive for Metal, Plastic, Rubber, Ceramics, and Wood, Multi-Purpose Transparent Glue (Not 502)
$21.60
Jay Chou - Feng BROTHER_CHAO Piano Accompaniment Sheet Music
$50.00
Toplip Automatic Retractable Air Hose Reel, Water Drum, High-Pressure Foam Drum for Pneumatic Tools and Auto Repair
$118.00
500L Yogurt Production Line - Stand-Up Pouch Filling Machine with Complete Dairy Processing Equipment and Fermentation Tank
$13,720.00
5A Grade Uruguay Natural Deep Purple Amethyst Loose Beads DIY Crystal Accessories Amethyst Loose Round Beads Semi-Finished
$1.20
Car Vacuum Cleaner - High Suction, Compact, Silent, and High-Power
$68.89
Fifty Seven-Character Quatrains in Wang Xizhi's Running Script Calligraphy
$67.00
Food-Grade Square Retainer Storage Case for Orthodontic Aligners and Dentures
$6.72
365-Day Electric Guitarist Training Plan by Toshiro Miyako – Rock Electric Guitar Chinese Tutorial
$53.00
Portable Invisible Aligner Case - Compact Breathable Box for Orthodontic Retainers, Dentures, and Cleaning Storage
$18.80
Makeup Room Shelf Triangle Bathroom Corner Storage Rack No-Drill Wall-Mounted Vanity Organizer
$23.82
Stainless Steel Sink Organizer for Sponges and Steel Wool - Drill-Free Dishwashing Pad Rack with Drainage
$9.50
Monet Detail Watercolor Brush Set - Goat Hair Liner, Round Wolf Hair, Flat Oil Painting and Gouache Brushes
$76.00
365-Day Electric Guitarist Development Plan Beginner Introductory Electric Guitar Textbook Self-Study Tutorial Basic Skills Practice
$28.90
Over-Toilet Storage Rack for Bathroom - Multi-Functional No-Drill Organizer
$14.70
Wuxi 3D Five-Axis CNC High-Pressure Waterjet Cutting Machine for Metal, Glass, and Stone Inlay Patterns
$431,980.00
Zodiac Dragon & Snake Rattle Toy for Babies, Sheepskin Drum Head, Solid Wood, Non-Toxic, Chewable, Sensory Grasping Toy for 6+ Months
$14.80
Menghu Custom Plush Squeaky Keychain with Custom Voice - DIY Anime Comic Fabric Mini Pillow Charm
$12.80
Hell Jazz Drumming: Ultimate Drum Skill Training Institute - Complete Rock Drum Kit Manual and Tutorial for Drummers
$58.00
Custom Calligraphy Felt Mat for Chinese Painting and Brush Writing – Wool Felt Desk Pad or Wall Mat for Four Treasures of the Study
$9,022.00
Mini Watercolor Paint Notebook – Compact, Portable, Thickened Sketchbook for Markers, Ideal for Students and Casual Drawing
$7.58
Manufacturer Sales 35-Piece Automotive Repair Tool Set, 1/2" Pneumatic Socket Set, Extended Impact Sockets
$165.00
Portable Invisible Aligner Case for Invisalign and Children's Orthodontic Retainers
$12.50
Paper Blending Stumps Set for Art Highlighting and Sketching, Professional Smudging Tools for Fine Arts Students
$2.65
Sketch Blending Stump and Knife Set - Art Supplies Including Paper Stumps, Makeup Sponges, Highlight Detail Tools, Charcoal Wipers, and Scraper Kit
$4.08
New Children's Potty Training Seat for Boys and Girls
$28.00
FRP Spray Purification Tower for Thermal Power Plant Exhaust Gas Treatment - Desulfurization, Denitrification, Acid Mist Scrubber, FRP Chimney
$680.00
Handmade Natural Gourd Cute Smiley Face Rattle Baby Soothing Toy Safe for Chewing No Paint
$32.30
![[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)
