The Arduino UNO R4 Minima is a next-generation high-performance microcontroller board built for demanding embedded applications while maintaining full compatibility with Arduino UNO R3 shields, modules, and accessories. Powered by the Renesas RA4M1 Arm Cortex-M4 processor running at 48 MHz, it offers more than triple the processing performance of its predecessor along with significantly expanded memory—ideal for complex coding, advanced IoT systems, robotics, industrial automation, sensor interfacing, and high-precision electronics projects.

Engineered for developers seeking a powerful yet cost-efficient platform, the UNO R4 Minima introduces premium new hardware features including a 12-bit DAC for true analog output, CAN bus for automotive and industrial communication, an integrated operational amplifier for real analog signal conditioning, and an SWD debugging port for professional-grade development. With 6–24V wide-range input support, durable 5V logic for shield compatibility, and a modern USB-C interface, the UNO R4 Minima elevates performance while retaining the simplicity and reliability Arduino is known for.

This board is ideal for students, hobbyists, engineers, educators, and IoT innovators who require robust hardware for next-level prototypes and production-ready designs.

Features:

• Renesas RA4M1 Arm Cortex-M4 48MHz microcontroller for high-speed processing

• Over 3× the performance of the UNO R3 for complex, real-time tasks

• 256KB Flash and 32KB SRAM enabling memory-intensive applications

• Integrated 12-bit DAC for precise analog output, waveform generation, and audio signals

• High-resolution ADC (up to 14-bit) for accurate analog sensing

• Built-in CAN bus interface for automotive and industrial communication networks

• SWD debugging port for advanced embedded debugging and professional workflows

• USB-C programming and power interface for durability and modern connectivity

• 5V operating logic ensures full compatibility with existing Arduino UNO R3 shields

• Wide 6–24V VIN power input for motors, actuators, and high-power projects

• Onboard operational amplifier for signal amplification and conditioning

• HID USB capability for keyboard and mouse emulation

• Fully backward-compatible UNO form factor for seamless project upgrades

Specifications:

• Microcontroller: Renesas RA4M1, 48 MHz Arm Cortex-M4

• Flash Memory: 256 KB

• SRAM: 32 KB

• EEPROM: 8 KB

• Operating Voltage: 5V

• Input Voltage (VIN): 6–24V

• Clock Speed: 48 MHz

• Programming Interface: USB-C

• Digital I/O Pins: 14

• PWM Pins: 6

• Analog Inputs (ADC): 6 (up to 14-bit resolution)

• DAC Output: 1 (12-bit)

• SPI Ports: 1

• I2C Ports: 1

• CAN Bus Interface: 1

• On-board Operational Amplifier: Yes

• Debug Port: SWD

• Form Factor: Standard Arduino UNO

How to Use:

• Connect the board to a computer using a USB-C cable for powering and programming

• Install the latest Arduino IDE and select “Arduino UNO R4 Minima” from the board manager

• Utilize the expanded memory and high-performance Cortex-M4 CPU for complex algorithms and real-time processing

• Use the DAC pin to generate analog waveforms, tones, or control analog devices

• Interface sensors through the high-resolution ADC inputs for accurate measurements

• Use CAN bus pins to connect with automotive networks or multi-node communication systems

• Apply the onboard OP AMP for input signal conditioning or analog amplification

• Utilize SWD debugging for in-depth inspection of firmware during development

• Power the board through VIN (6–24V) for high-power robotics or industrial applications

• Attach UNO R3-compatible shields without any additional adaptation

Usage Instructions:

• Always supply correct voltage between 6–24V when using VIN to avoid damage

• Ensure correct polarity when connecting external power sources

• Use level-shifting methods if interfacing with 3.3V-only devices

• Avoid short circuits when working with motors or high-current actuators

• Install necessary libraries in the Arduino IDE for CAN bus, DAC, HID, or OP AMP functionalities

• Use SWD pins and compatible debugging tools for firmware inspection

• Follow Arduino documentation for pin mapping and advanced features

• Keep USB-C port clean and avoid excessive bending of connected cables

• Use proper grounding when integrating multiple sensors or modules

Package Includes:

• 1 × Arduino UNO R4 Minima (Original)

• 1 × USB Cable

• 1 × Quick Start Guide

Ideal For:

• Embedded systems development

• High-accuracy sensor systems and data logging

• Automotive CAN communication projects

• Robotics and mechatronics with up to 24V power input

• Industrial automation and machine control

• Advanced STEM learning and classroom robotics

• IoT prototyping and secure device development

• Audio generation and real analog output applications

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