The Arduino UNO R4 Minima is a next-generation development board designed for makers, students, and professionals seeking more power and flexibility in their projects. Featuring the Renesas RA4M1 microprocessor, it delivers enhanced processing speed, increased memory, and additional onboard peripherals while keeping full compatibility with the classic UNO R3 form factor. Its 5V operating voltage ensures easy integration with countless existing shields and sensors, while inbuilt HID support allows it to act as a keyboard or mouse natively. Whether you are upgrading from the UNO R3 or starting a new project, the UNO R4 Minima provides the performance and reliability needed for advanced electronics, robotics, and embedded system applications. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
High-performance RA4M1 MCU – Delivers faster execution speed and improved efficiency.
Expanded memory – Run more complex programs without memory limitations.
Classic UNO form factor – 100% compatible with existing Arduino shields and accessories.
Inbuilt HID support – Easily emulate USB keyboards and mice without extra components.
Extra onboard peripherals – Enables wider project applications and flexibility.
5V operating voltage – Ensures seamless integration with sensors, modules, and external circuits.
Durable build quality – High-quality edition manufactured in China for consistent performance.
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Applications:
DIY Electronics Projects – From LED control to motor drivers, perfect for hobbyists.
Robotics & Automation – Enhanced processing for real-time robotic control.
IoT Development – Ideal for creating connected smart devices with HID integration.
STEM Education – Great for students learning coding, hardware interfacing, and embedded systems.
Prototyping & Product Development – Faster development cycles with higher memory and speed.
Human Interface Devices – Easily build custom keyboards, controllers, or automation panels.
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| General Specifications |
| Microcontroller | Renesas RA4M1 |
| Clock Speed | Faster than UNO R3 (48 MHz) |
| Operating Voltage | 5V |
| Compatibility | Arduino UNO R3 shields & modules |
| USB HID Support | Yes (Keyboard/Mouse Emulation) |
| Form Factor | UNO R3 standard |
| Onboard Peripherals | Expanded vs UNO R3 |
| Origin | Made in China |
| Shipment Weight | 0.0202 kg |
| Shipment Dimensions | 9 × 10 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
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
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FAQs
Can I use hardware compatible with the Arduino UNO R3 with the Arduino UNO R4 WiFi?
Yes, the Arduino UNO R4 WiFi was specifically designed to ensure compatibility with previous shields and compatible hardware developed for the Arduino UNO R3. The UNO R4 WiFi 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 WiFi without the need for significant changes or adaptations to your projects.
Can I use hardware compatible with the Arduino UNO WiFi Rev2 with the Arduino UNO R4 WiFi?
Yes, the Arduino UNO R4 WiFi is fully compatible with previous shields and hardware developed for the UNO WiFi Rev2. Both boards share the same UNO form factor and 5 V operating voltage. However, it's important to note that depending on the design, there may be changes in the pinout elements. Please refer to the documentation and pinout diagrams for specific details and compatibility considerations.
Can I use my sketch developed for the UNO R3 in the UNO R4?
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 WiFi?
No, some UNO R3 libraries use instructions of the AVR architecture that are not compatible with the architecture of the UNO R4 WiFi, however there are libraries that have already been ported as part of our early adopters program or are based on the Arduino API.
What is the on-board LED Matrix on the Arduino UNO R4 WiFi and how can I use it?
The on-board LED Matrix is a fully addressable 12x8 (96 points) red matrix that utilizes Charlieplexing to individually control each point. To get started, simply download the “Arduino UNO R4 boards” core. This will grant you access to the user-friendly Arduino_LED_Matrix API, allowing you to program and control the LED Matrix. More information can be found here.
Are there any tools available to assist with creating animations for the LED Matrix?
Absolutely! We have developed a graphic tool specifically designed to help makers create and export their own animations. This way, you can unleash your creativity and make the most of this exciting feature. Find more information on the Arduino Labs website.
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Package Includes:
1 x Arduino UNO R4 Minima
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