Arduino
Arduino Uno R4 Minima
Best high-performance microcontroller for hobbyists upgrading from classic development boards.
The Arduino UNO R4 Minima is a versatile microcontroller board built on the familiar UNO form factor, operating at a reliable 5V. It boasts expanded memory and a faster 48 MHz clock speed, powered by a Renesas RA4M1 Cortex-M4 processor, making it ideal for more demanding projects. This board offers enhanced connectivity with a USB-C port supporting HID simulation and a DC jack for flexible power input up to 24V. With 14 digital I/O pins, 6 analog inputs, and a 12-bit DAC, it provides ample resources for creative development and seamless integration with existing UNO R3 shields.
$17.95
More Arduino UNO Options
Owner Satisfaction
4.7
/ 5
Category Rank
28
/ 1541
#28 in Development Boards
Price vs Category Average
-80%
Below average
Form Factor
3
/ UNO (Compatible with R shields)
Who it's for
- Developers needing faster processing and more memory for complex code
- Makers reusing existing shields and hardware accessories
- Budget-conscious engineers building standalone, wired hardware projects
Who should skip it
- Users requiring built-in internet or cloud connectivity
- Programmers relying on legacy or niche Arduino libraries
- Audio enthusiasts needing advanced analog signal generation
Performance breakdown
Processing Power
The Cortex-M4 core handles demanding logic far better than classic boards.
Shield Compatibility
Retains the iconic form factor for seamless integration with existing hardware.
Connectivity Versatility
USB-C and HID support make peripheral integration intuitive and modern.
Power Flexibility
Wide voltage input range accommodates diverse power sources with ease.
Debugging Efficiency
Dedicated SWD connector simplifies troubleshooting for more complex project builds.
Analog Precision
The 12-bit DAC provides significantly improved resolution for analog signal output.
Key Specs
Form Factor
UNO (Compatible with R3 shields)
Operating Voltage
5V
Input Voltage
Up to 24V
Microcontroller
Renesas RA4M1 (Cortex-M4)
Clock Speed
48 MHz
Flash Memory
256 KB
SRAM
32 KB
Digital I/O Pins
14
Features
- Classic UNO form factor with upgraded performance
- Expanded memory and faster clock speed
- Supports wide input voltage range up to 24V
- Integrated HID for mouse/keyboard simulation
- On-board 12-bit DAC for analog output
- Streamlined debugging with SWD connector
- Compatible with existing UNO R3 shields
- Flexible power options via USB-C or DC jack
What customers say
Customers overwhelmingly praise the Arduino Uno R4 Minima for its significant performance upgrade. The new 32-bit microcontroller delivers substantial increases in speed, RAM, and flash memory, enabling more complex projects. A key benefit is the retention of the classic Uno form factor and 5V operation, ensuring excellent compatibility with existing shields and accessories. This balance of future proofing and accessibility is highly valued. Many users consider the Minima exceptional value, offering robust processing power at an accessible price point. It is seen as a reliable and essential upgrade that maintains the Uno's status as a standard development platform.
Know before you buy
Yes, the R4 Minima maintains the classic UNO form factor and pinout, ensuring it is compatible with most existing R3 shields. However, please note that the R4 operates at 5V, so ensure your specific shields are designed for this voltage level.
The R4 Minima features a significantly more powerful Renesas RA4M1 Cortex-M4 processor running at 48 MHz, compared to the 16 MHz AVR processor in the R3. It also provides a substantial upgrade in memory with 256 KB of flash and 32 KB of SRAM, allowing you to run more complex code and larger projects.
Yes, the R4 Minima supports HID (Human Interface Device) simulation. This allows the board to be recognized by your computer as a keyboard or mouse, which is perfect for automation tasks or custom input devices.
The board supports a wide input voltage range through the DC jack, accepting up to 24V. This flexibility makes it easier to power your projects using various external power supplies without needing additional voltage regulation.
Yes, it features a 12-bit Digital-to-Analog Converter (DAC). This allows you to generate true analog signals, which is a significant improvement over the PWM-based analog output found on previous UNO models.
Yes, the R4 Minima includes a dedicated CAN bus interface. This makes it a great choice for automotive projects or industrial communication tasks that require robust, reliable data transmission.
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