Arduino UNO EK (एक) R4 Minima – Made in India

The Arduino UNO EK (एक) R4 Minima is an official Arduino development board based on the Renesas RA4M1 32-bit Arm Cortex-M4 microcontroller. It retains the familiar UNO form factor and 5V operating voltage while introducing a newer microcontroller architecture, increased memory, USB-C connectivity, and additional built-in peripherals.

The RA4M1 operates at 48 MHz and provides 256 KB Flash memory, 32 KB SRAM, and 8 KB data memory. The board provides 14 digital I/O pins, including 6 PWM-capable pins, and 6 analog inputs with analog resolution of up to 14 bits.

The UNO R4 Minima also adds peripherals that expand the types of projects that can be developed with the UNO platform. These include a 12-bit digital-to-analog converter (DAC), real-time clock (RTC), CAN bus support, operational amplifier, floating-point unit (FPU), and HID functionality for applications such as keyboard and mouse emulation.

For connectivity and programming, the board uses a USB-C connector. It can also be powered through the VIN input or DC barrel jack within the specified input range of 6–24V.

The UNO R4 Minima maintains the UNO form factor, pinout, and 5V operating voltage, making it designed for compatibility with existing UNO R3 shields and hardware. However, software compatibility is not universal: sketches and libraries that depend directly on the older AVR architecture may require modification for the UNO R4 platform.

The UNO EK R4 Minima is presented by the supplied Robocraze listing as Made in India, making it a distinctive addition to the Arduino UNO R4 range.

Technical Specifications

Technical Parameter	Specification
Product Type	Microcontroller Development Board
Board Name	Arduino UNO R4 Minima
Model / SKU	ABX00080
Microcontroller	Renesas RA4M1
CPU Architecture	32-bit Arm Cortex-M4
Clock Speed	48 MHz
Operating Voltage	5V
Flash Memory	256 KB
SRAM	32 KB
Data Memory / EEPROM	8 KB
Digital I/O Pins	14
PWM-Capable Pins	6
Analog Input Pins	6
Analog Input Resolution	Up to 14-bit
DAC	1 × up to 12-bit DAC
RTC	Built-in Real-Time Clock
CAN	1 × CAN interface; external transceiver required
UART	1
I²C	1
SPI	1
OP AMP	Built-in
FPU	Built-in Floating Point Unit
HID	Supported for keyboard/mouse emulation
USB Connector	USB-C
VIN / DC Input	6–24V
USB Input	5V nominal
DC Current per I/O Pin	8 mA
Board Width	68.85 mm
Board Length	53.34 mm
Board Form Factor	Arduino UNO
Operating Temperature	-40°C to +85°C
Origin	Made in India*
Quantity	1 board

*The supplied Robocraze product listing identifies this UNO EK version as Made in India.

Technical Specification Pointer

32-Bit RA4M1 Platform: The UNO R4 Minima uses a 48 MHz Renesas RA4M1 Arm Cortex-M4 microcontroller with 256 KB Flash, 32 KB SRAM and 8 KB data memory, while retaining a 5V UNO form factor. It additionally provides a DAC, RTC, CAN interface support, OP AMP, FPU and USB-C connectivity.

Key Features

• 32-bit Arm Cortex-M4: Powered by the Renesas RA4M1 microcontroller running at 48 MHz.
• Expanded Memory: 256 KB Flash, 32 KB SRAM and 8 KB data memory.
• 5V UNO Platform: Retains the 5V operating voltage and familiar UNO form factor.
• USB-C Connectivity: Uses a modern USB-C connector for programming and USB power.
• 12-bit DAC: Provides analog output capability for compatible applications.
• Real-Time Clock: Built-in RTC for time and date based projects.
• CAN Bus Support: Provides CAN connectivity; an external CAN transceiver is required.
• 14 Digital I/O: Provides 14 digital input/output pins.
• 6 PWM Pins: Supports PWM-based control on six digital pins.
• 6 Analog Inputs: Supports analog signal acquisition with resolution of up to 14 bits.
• HID Support: Can be used for projects that emulate compatible USB input devices such as keyboards and mice.
• OP AMP and FPU: Additional microcontroller peripherals for suitable signal-processing and computational applications.

Recommended Applications

• Embedded programming
• Electronics prototyping
• STEM education
• Sensor-based projects
• Automation projects
• Data acquisition
• Analog signal generation
• Real-time monitoring projects
• CAN-based development
• USB HID projects
• IoT prototypes
• Advanced Arduino projects
• Electronics and embedded-system experimentation

Educational Applications

The UNO R4 Minima can be used to teach and demonstrate:

• 32-bit microcontroller architecture
• Embedded C/C++ programming
• Digital input and output
• Analog signal acquisition
• PWM control
• Digital-to-analog conversion
• Real-time clock applications
• Serial communication
• I²C and SPI communication
• CAN bus fundamentals
• USB HID concepts
• Sensor interfacing
• Embedded-system development

Project Possibilities

The board can be used for projects such as:

• Sensor monitoring systems
• Digital control systems
• Data acquisition projects
• Real-time clock applications
• Analog signal generation
• USB keyboard or mouse emulation projects
• CAN-based communication experiments
• Automation prototypes
• Environmental monitoring systems
• Embedded control projects
• STEM demonstration models
• Advanced electronics prototypes

Compatibility Notes

The UNO R4 Minima maintains the UNO form factor, pinout and 5V operating voltage and is designed for compatibility with existing UNO R3 shields and hardware.

However, not every UNO R3 library or sketch is automatically compatible. Software that depends directly on the older AVR architecture may require changes when moving to the UNO R4 Minima.

CAN communication also requires an external CAN transceiver; the board does not provide a complete CAN physical-layer interface by itself.

What’s Included

• 1 × Official Arduino UNO EK (एक) R4 Minima

Important Notes

• This is an official Arduino board.
• The supplied product listing identifies this specific UNO EK version as Made in India.
• The board operates at 5V logic/operating voltage.
• VIN/DC input is specified for 6–24V.
• The 8 mA figure is the specified maximum DC current per I/O pin; it should not be treated as a recommendation for driving high-current loads directly.
• Motors, high-current LEDs, relays and other higher-current loads should be controlled through suitable driver circuitry rather than directly from microcontroller I/O pins.
• CAN communication requires an external transceiver.
• Some UNO R3 software libraries that rely on AVR-specific functionality may require modification for UNO R4.
• Product images and accessories may vary by package; the package contents above should be treated as the listed board only unless additional accessories are specifically stated.

Product Summary

The Arduino UNO EK (एक) R4 Minima – Made in India combines the familiar UNO development-board format with a 32-bit Renesas RA4M1 Arm Cortex-M4 running at 48 MHz. With 256 KB Flash, 32 KB SRAM, 8 KB data memory, 14 digital I/O pins, 6 analog inputs, PWM, DAC, RTC, CAN support, USB-C and additional microcontroller peripherals, it provides an expanded platform for electronics education, embedded development, automation and advanced Arduino projects.