Arduino® UNO R4 Minima
Introducing the Arduino UNO R4 Minima! This board boasts the RA4M1 microprocessor from Renesas, delivering increased processing power, expanded memory, and additional peripherals. And the best part? It stays true to the reliable UNO form factor and operates at a practical 5 V voltage. Brace yourself for an upgrade like no other with the Arduino UNO R4 Minima!
Overview
Enhanced and improved, the Arduino UNO R4 Minima is armed with a powerful 32-bit microcontroller courtesy of Renesas. Brace yourself for increased processing power, expanded memory, and a whole new level of on-board peripherals. The best part? Compatibility with existing shields and accessories remains intact, and there's no need to make any changes to the standard form factor or 5 V operating voltage.
Joining the Arduino ecosystem, the UNO R4 is a trusty addition suitable for both beginners and seasoned electronics enthusiasts. Whether you're just starting out or looking to push the boundaries of your projects, this robust board delivers reliable performance every time.
Here's what the UNO R4 Minima brings to the table:
- Hardware compatibility with UNO form factor: The UNO R4 Minima maintains the same form factor, pinout, and 5 V operating voltage as its predecessor, the UNO R3. This ensures a seamless transition for existing shields and projects, leveraging the extensive and unique ecosystem already established for the Arduino UNO.
- Expanded memory and faster clock: Prepare for more precise calculations and the ability to handle complex projects with ease. The UNO R4 Minima boasts increased memory and a faster clock speed, empowering you to tackle demanding tasks effortlessly.
- Extra on-board peripherals: The UNO R4 Minima introduces a range of on-board peripherals, including a 12-bit DAC, CAN BUS, and OP AMP. These additional components provide you with expanded capabilities and flexibility in your designs.
- Extended 24 V tolerance: The UNO R4 Minima now supports a wider input voltage range, allowing power supplies up to 24 V. This enables seamless integration with motors, LED strips, and other actuators, simplifying your projects by utilizing a single power source.
- SWD connector: Debugging is a critical aspect of any project. Simply connect an external debugger to the UNO R4 Minima and effortlessly monitor the inner workings of your system. Stay in control and gain valuable insights.
- HID support: The UNO R4 Minima comes with built-in HID (Human Interface Device) support, enabling it to simulate a mouse or keyboard when connected to a computer via a USB cable. This convenient feature makes it a breeze to send keystrokes and mouse movements to a computer, enhancing usability and functionality.
Get ready to unlock a world of possibilities with the Arduino UNO R4 Minima. Its exceptional features and enhanced capabilities make it the perfect companion for your innovative ventures.
If you are looking to upgrade your project with wireless connectivity or want to start exploring the world of IoT, you can check the Arduino UNO R4 WiFi.
Tech specs
| Board | Name | Arduino® UNO R4 Minima |
| SKU | ABX00080 | |
| Microcontroller | Renesas RA4M1 (Arm® Cortex®-M4) | |
| USB | USB-C® | Programming Port |
| Pins | Digital I/O Pins | 14 |
| Pins | Analog input pins | 6 |
| DAC | 1 | |
| PWM pins | 6 | |
| Communication | UART | Yes, 1x |
| I2C | Yes, 1x | |
| SPI | Yes, 1x | |
| CAN | Yes 1 CAN Bus | |
| Power | Circuit operating voltage | 5 V |
| Input voltage (VIN) | 6-24 V | |
| DC Current per I/O Pin | 8 mA | |
| Clock speed | Main core | 48 MHz |
| Memory | RA4M1 | 256 kB Flash, 32 kB RAM |
| Dimensions | Width | 68.85 mm |
| Length | 53.34 mm | |
Conformities
Resources for Safety and Products
Manufacturer Information
The production information includes the address and related details of the product manufacturer.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
https://www.arduino.cc/
Responsible Person in the EU
An EU-based economic operator who ensures the product's compliance with the required regulations.
Arduino S.r.l.
Via Andrea Appiani, 25
Monza, MB, IT, 20900
Phone: +39 0113157477
Email: support@arduino.cc
Documentation
Learn more
Get Inspired
With just a few days to go, Arduino Days 2025 promises to be one of the biggest and most exciting events in our 20-year history! Join us for two days of live-streamed content on March 21st-22nd, featuring inspiring talks, major product announcements, and community showcases from makers, educators, and industry leaders worldwide. Big announcements and exclusive discounts We’ll be diving into some of our most exciting recent launches, including the Portenta Proto Kit ME, the E/E Starter Kit developed with Bosch, and Arduino UNO Ek R4 – made in India and available exclusively in the country. But that’s just the beginning: tune in to be the first to hear about brand-new announcements, including exciting developments around Arduino Cloud! And because we’re celebrating 20 years of Arduino, we’ve got something special for you: exclusive discounts on the Arduino Store throughout the event. A packed lineup of speakers and topics This year’s live-streamed event brings together an incredible mix of voices, from Arduino users presenting their ideas to startups and multinational partners sharing their success stories. Expect sessions covering robotics, generative AI, building automation, and K-12 education, with insights from some of the most influential figures in open-source hardware, IoT, and embedded technology. Eben Upton (Raspberry Pi), Limor Fried (Adafruit), and Zach Shelby (Edge Impulse) will discuss the future of connected devices and how open-source platforms continue to shape innovation. For those interested in IoT and connectivity, we’ll have key insights from Swee Ann Teo (Espressif Systems), Matt Johnson (Silicon Labs), and Jonhatan Beri (Golioth), covering how hardware, cloud, and AI are coming together to power the next generation of smart devices. You’ll find plenty of inspiration for your projects thanks to guests that run the gamut from custom electric cars (Charly Bosch) to interactive art (Mónica
FAQs
Can I use hardware compatible with the Arduino UNO R3 with the Arduino UNO R4 Minima?
Yes, the Arduino UNO R4 Minima was specifically designed to ensure compatibility with previous shields and compatible hardware developed for the Arduino UNO R3. The UNO R4 Minima maintains the same mechanical and electrical compatibility, allowing you to seamlessly use your existing shields and hardware with the new board. This makes it easy to upgrade to the UNO R4 Minima without the need for significant changes or adaptations to your projects.
Can I use my sketch developed for the UNO R3 in the UNO R4 Minima?
Yes, if your sketch was developed using the Arduino API. In case you are using instructions only available for the AVR architecture, some changes need to be made to ensure compatibility.
Are all libraries compatible with the UNO R3 also compatible with the UNO R4 Minima?
No, some UNO R3 libraries use instructions of the AVR architecture that are not compatible with the architecture of the UNO R4 Minima, however there are libraries that have already been ported as part of our early adopters program or are based on the Arduino API.
