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Notify me when its in stockArduino UNO R4 Minima
The Arduino UNO R4 Minima is the latest and most powerful member of Arduino’s classic UNO series. Equipped with the Renesas RA4M1 32-bit microcontroller, this board offers increased processing power, expanded memory, and additional peripherals compared to its predecessors. It retains the classic UNO form factor, ensuring full compatibility with existing shields and accessories. With a 5V operating voltage, it is an ideal choice for both beginners and experienced electronics enthusiasts. Whether you’re designing a simple LED circuit or developing complex automation projects, the UNO R4 Minima delivers reliable performance.
This board, with its 48 MHz clock speed and expanded memory capacity, can easily handle complex calculations and support large projects. It is equipped with features such as a 12-bit DAC, CAN Bus, OP AMP, and Real-Time Clock (RTC). The extended input voltage tolerance up to 24V allows easy integration with motors, LED strips, and other actuators. The USB-C port enhances compatibility with modern devices, while the SWD connector simplifies debugging operations. With HID (Human Interface Device) support, it can act as a mouse or keyboard when connected to a computer, providing a significant advantage for interactive projects.
The Arduino UNO R4 Minima is optimized for prototyping and educational projects. Its compact design and powerful hardware offer a wide range of applications, from STEM education to professional projects. Supported by Arduino’s extensive ecosystem, this board seamlessly integrates with existing libraries and community projects. It is a versatile solution for needs ranging from beginner to advanced projects.
Key Innovations (Compared to Arduino UNO R3):
32-bit Microcontroller: Compared to the UNO R3’s 8-bit ATmega328P microcontroller, the UNO R4 Minima offers higher processing power and a 48 MHz clock speed with its 32-bit Renesas RA4M1 (Arm® Cortex®-M4) microcontroller.
Expanded Memory: Compared to the UNO R3’s 32 kB Flash, 2 kB SRAM, and 1 kB EEPROM, the UNO R4 Minima provides 256 kB Flash, 32 kB SRAM, and 8 kB EEPROM, making it ideal for larger and more complex programs.
USB-C Connectivity: Unlike the UNO R3’s USB-B port, the UNO R4 Minima uses a modern and durable USB-C port.
Additional Peripherals: Features like 12-bit DAC, CAN Bus, OP AMP, and Real-Time Clock (RTC) provide advanced capabilities not available in the UNO R3.
Extended Input Voltage: Compared to the UNO R3’s 7-12V input voltage range, the UNO R4 Minima offers greater flexibility with a 6-24V input voltage.
HID Support: The UNO R4 Minima offers built-in HID support for mouse and keyboard emulation, a feature not available in the UNO R3.
Arduino UNO R4 Minima Technical Specifications:
Board Name: Arduino® UNO R4 Minima
SKU: ABX00080
Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4)
USB: USB-C® Programming Port
Digital I/O Pins: 14
Analog Input Pins: 6
DAC: 1 (12-bit)
PWM Pins: 6
UART: 1x
I2C: 1x
SPI: 1x
CAN: 1x CAN Bus (external transceiver required)
Circuit Operating Voltage: 5V
Input Voltage (VIN): 6-24V
DC Current per I/O Pin: 8 mA
Clock Speed: Main core 48 MHz
Memory: 256 kB Flash, 32 kB RAM
Dimensions: 68.85 mm (Width) x 53.34 mm (Length)
Additional Features: Real-Time Clock (RTC), 14-bit ADC resolution, HID support, SWD connector, OP AMP
Certifications: UKCA, FCC, REACH, CE, RoHS, RCM, ISED/IC
Power:
Operating Voltage: 5V
Input Voltage (VIN): 6-24V
Power Sources: USB-C (5V), Barrel Jack, VIN pin
Protection: Overvoltage and reverse polarity protection with Schottky diodes
Current per I/O Pin: 8 mA
Memory:
Flash Memory: 256 kB
SRAM: 32 kB
EEPROM: 8 kB
Input/Output:
Digital I/O Pins: 14 (D0-D13, 6 with PWM support)
Analog Input Pins: 6 (A0-A5, 14-bit ADC resolution)
DAC: 1 (12-bit, on A0 pin)
Communication:
UART: 1x (D0, D1 pins)
I2C: 1x (A4, A5 pins, SDA and SCL)
SPI: 1x (D10-D13 pins and ICSP header)
CAN Bus: 1x (D4, D5 pins, external transceiver required)
Programming:
Programming Environment: Arduino IDE, Arduino Cloud Editor
Debugging: External debugger support via SWD connector
HID Support: Mouse and keyboard emulation
USB Overcurrent Protection:
Protection: Schottky diodes protecting the USB port from short circuits and overcurrent
Power Selection: Power OR circuit for automatic power selection between USB and VIN
Frequently Asked Questions:
Can hardware compatible with the Arduino UNO R3 be used with the Arduino UNO R4 Minima? Yes, the Arduino UNO R4 Minima is designed to maintain the same mechanical and electrical compatibility as the UNO R3. Existing shields and hardware can be used seamlessly, so you don’t need to make significant changes to upgrade your projects.
Can sketches developed for the UNO R3 be used on the UNO R4 Minima? Yes, sketches developed using the Arduino API are generally compatible. However, sketches containing instructions specific to the AVR architecture may require some modifications for compatibility.
Are all UNO R3 libraries compatible with the UNO R4 Minima? No, some UNO R3 libraries contain instructions specific to the AVR architecture and may not be compatible with the UNO R4 Minima’s Arm architecture. However, Arduino API-based libraries and those ported as part of the early adopters program can be used.
Useful Links / Documentation:
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