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UNO R4 Minima Compatible

UNO R4 Minima Compatible

The UNO R4 Minima Compatible Board is a fully compatible development board designed as a cost-effective alternative to the official Arduino UNO R4 Minima while maintaining the same functionality, pin layout, and software compatibility. Based on the UNO R4 architecture, it supports existing Arduino projects and libraries, making it suitable for embedded systems, IoT devices, robotics, automation, education, and rapid prototyping. In addition to full compatibility with the official board, this version incorporates several practical hardware improvements. It features an additional GPIO header row for easier external connections, a dial switch for convenient hardware mode selection instead of solder jumpers, and a USB Type-C interface for reliable power and programming. Cost-optimized components help reduce overall board cost while maintaining stable performance for professional and educational applications.

Package Includes

  • 1 × UNO R4 Minima Compatible Board
  • 1 × USB Type-C Cable
56.50 AED 56.50 AED (Tax included)

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Features

  • Fully compatible with the official Arduino UNO R4 Minima.
  • Maintains the same pin layout and functionality.
  • Compatible with the Arduino IDE and UNO ecosystem libraries.
  • Additional GPIO header row for easier wiring and expansion.
  • USB Type-C interface for programming and power.
  • Dial switch for convenient hardware mode selection.
  • No soldering required for switching operating modes.
  • Cost-optimized hardware design while maintaining stable performance.
  • Suitable for rapid prototyping and educational projects.
  • Breadboard and shield compatible using the standard UNO layout.

Principle of Operation

The UNO R4 Minima Compatible Board operates as a standard Arduino-compatible microcontroller development platform. Programs are uploaded from the Arduino IDE through the USB Type-C interface, where they are stored in the onboard microcontroller and executed independently.

The onboard GPIO pins allow the microcontroller to interface with sensors, displays, communication modules, motors, relays, and other electronic peripherals. Digital, analog, PWM, and serial communication peripherals enable the board to perform monitoring, control, automation, and data acquisition tasks.

The integrated dial switch simplifies hardware configuration by allowing operating modes to be selected without modifying solder jumpers, making development faster and more convenient.

Applications

  • Arduino development projects
  • Embedded systems
  • Internet of Things (IoT)
  • Robotics
  • Industrial automation
  • Sensor interfacing
  • Motor control
  • Data acquisition systems
  • Educational STEM projects
  • Rapid prototyping

Pinout

The board follows the standard Arduino UNO R4 Minima pin layout, ensuring compatibility with existing shields and accessories.

Arduino Uno R4 Minima — SunFounder 3in1 Kit documentation

Pin Group Function
D0 – D13 Digital Input / Output Pins
D3, D5, D6, D9, D10, D11 PWM Outputs
A0 – A5 Analog Inputs
UART Serial Communication
SPI High-Speed Peripheral Communication
I²C Two-Wire Communication Interface
5V Power Output
3.3V Power Output
VIN External Power Input
GND Ground
USB Type-C Programming and Power

Wiring

The board connects directly to a computer using the included USB Type-C cable for programming and power. External modules connect to the standard Arduino GPIO headers using jumper wires.

Arduino UNO R4 Minima Overview & Getting Started Guide

Peripheral Connection
Computer USB Type-C
Digital Sensors D0–D13
Analog Sensors A0–A5
I²C Modules SDA / SCL
SPI Devices MOSI / MISO / SCK / SS
Servo Motors PWM Pins

Library Required

No special libraries are required for basic operation. The board is fully compatible with the Arduino IDE and standard Arduino libraries.

Commonly used libraries include:

  • Wire (I²C Communication)
  • SPI
  • EEPROM
  • Servo
  • SoftwareSerial (if required)

Example Code


// Blink Example

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(500);

  digitalWrite(LED_BUILTIN, LOW);
  delay(500);
}

Specifications

Product Type UNO R4 Minima Compatible Development Board
Compatibility Arduino UNO R4 Minima
Operating Voltage 5V
Recommended Input Voltage 6V – 24V DC
Digital I/O Pins 14
Analog Inputs 6
PWM Channels 6
USB Interface USB Type-C
Mode Selection Dial Switch
GPIO Expansion Additional Header Row
Software Support Arduino IDE

Resources