Arduino UNO R4 Minima

The Arduino UNO R4 Minima is a arduino + microcontroller component used by makers, students and engineers for electronics and embedded-systems projects.

The next evolution of the world's most popular development board. The Arduino UNO R4 Minima brings a massive performance upgrade with the Renesas RA4M1 microcontroller (Arm Cortex-M4, 48 MHz), 256 KB flash, and 32 KB SRAM - while maintaining full backward compatibility with existing UNO shields and projects. Available now from Tech Depot India, Bengaluru.

Specifications

• Microcontroller: Renesas RA4M1 (R7FA4M1AB3CFM#AA0)
• Core: Arm Cortex-M4F @ 48 MHz
• Flash Memory: 256 KB
• SRAM: 32 KB
• Operating Voltage: 5V
• Input Voltage (VIN): 6-24V
• Digital I/O Pins: 14 (6 PWM capable)
• Analog Input Pins: 6 (14-bit ADC)
• DAC Output: 1 (12-bit DAC)
• USB Connector: USB-C

Why Choose Arduino UNO R4 Minima?

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Key Features of Arduino UNO R4 Minima

• Perfect upgrade path from UNO R3 - same form factor, vastly better performance
• USB-C for modern, reliable connectivity and HID device emulation
• CAN bus and DAC open up industrial, automotive, and audio applications
• Extensive Arduino ecosystem - thousands of libraries, tutorials, and community resources
• Supported by Arduino IDE 2.x and Arduino Cloud for seamless development
• 3x More Flash Memory: 256 KB vs 32 KB - run larger, more complex sketches with ease
• 16x More SRAM: 32 KB vs 2 KB - handle bigger data buffers, arrays, and variables
• Arm Cortex-M4F Core: Hardware floating-point unit for fast math, DSP, and signal processing
• 14-Bit ADC Resolution: Far more precise analog readings compared to the R3's 10-bit ADC
• 12-Bit DAC Output: Generate true analog output signals - no external DAC needed

Perfect For

• Precision Data Logging: Use the 14-bit ADC and built-in RTC to log sensor data with timestamps - ideal for weather stations, environmental monitoring, and lab experiments.
• Audio & Signal Generation: Leverage the 12-bit DAC to generate waveforms, build a simple synthesizer, or create audio alert systems without external hardware.
• CAN Bus Automotive Projects: Connect directly to vehicle OBD-II systems, build custom dashboards, or prototype automotive sensor networks using the onboard CAN controller.
• Custom USB HID Devices: Create custom keyboards, macro pads, game controllers, or MIDI controllers using native USB HID emulation.
• Industrial Automation Prototyping: Use CAN bus, higher memory, and faster processing for PLC-style control, motor drivers

Key Upgrades Over UNO R3

• 3x More Flash Memory: 256 KB vs 32 KB - run larger, more complex sketches with ease
• 16x More SRAM: 32 KB vs 2 KB - handle bigger data buffers, arrays, and variables
• Arm Cortex-M4F Core: Hardware floating-point unit for fast math, DSP, and signal processing
• 14-Bit ADC Resolution: Far more precise analog readings compared to the R3's 10-bit ADC
• 12-Bit DAC Output: Generate true analog output signals - no external DAC needed
• Built-in CAN Bus: Direct connectivity for automotive, industrial, and robotics protocols
• Real-Time Clock (RTC): Onboard RTC with dedicated VRTC pin for timekeeping applications
• USB-C Connector: Modern, reversible, and robust USB-C replaces the old Micro-USB/Type-B
• HID Support: Emulate keyboard, mouse, and gamepad over USB natively
• Full Backward Compatibility: Same UNO footprint - all existing shields, sensors, and accessories work

Frequently Asked Questions

Customer Support

Email: techdepotindia@gmail.com

WhatsApp: Available for setup and troubleshooting help

Order your Arduino UNO R4 Minima today and start building your next project.

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